Pumps
Photo Type Series Description Main Specifications
Piston
Pumps
PVS
Variable Volume Piston
Pump
0.49 - 2.76in
3
/rev, 3000psi
Piston
Pumps
PZS
Variable Volume Piston
Pump
4.27 - 6.10in
3
/rev, 4085psi
7.93 - 13.42in
3
/rev, 3642psi
Vane
Pumps
VDR
Variable Volume Vane
Pump
7.9gpm, 2000psi
10.5gpm, 1000psi
Vane
Pumps
VDC
High-Pressure Type
Variable Volume Vane
Pump
7.9 - 31.7gpm, 2000psi
Vane
Pumps
VDS
Small Variable Volume
Vane Pump
0.5in
3
/rev, 4.0gpm, 1000psi
Uni-Pumps UVN
Variable Volume Vane
Pump
7.6gpm, 1160psi
PVS SERIES
VARIABLE VOLUME PISTON PUMP
0
M
*
*
Discharge
port
Suction
port
Drain
port
PVS Series Variable
Volume Piston Pumps
0.49 to 2.76in
3
/rev
3000psi
¡¡
Design No. 30 is applied on PVS-0B to make the pump more compact and lighter, and reduce noise.
¡¡
Production of PVS-3B has been discontinued. Use PZS-3B.
¡¡
Pressure adjustment 3 type has been added to PVS-1B-22 and PVS-2B-45. (Design No. 20 is applied only on
PVS-2B-45*3.)
P-1
Pressure rate control response is fast.
The construction is simple, which
improves reliability and eliminates
problems.
Pressure balance of the shoe and
the swash plate in the lateral
direction is accomplished by
discharged fluid directed to the
cavity of the shoe
--- For a completely hydraulically
balanced
assembly. The smooth operation
achieved contributes to the
features of high efficiency, low
noise and extended life.
Reliable fast response
mechanism
Pressure balanced shoe in the
lateral direction optimally
utilizes the discharged fluid
Sharp cut-off characteristics
obtained with simple adjusting
mechanism
The special shaped fluid flow port and
minute grooves have been developed
to reduce noise and thus makes the
operating sound negligible.
The NACHI flow adjusting mechanism,
operating with the action of the
semi-cylindrical swash plate, allows
very sharp cut-off characteristics.
Adjusting operation is easily made
with a spanner tool.
Special shaped fluid flow
port reduces noise
The swash plate a semi-cylindrical
design concept is an advancement to
the conventional type. In addition to
the innovative form, the swash plate
adopts special bearings to control
sideway motion. Consequently, power
is received directly regardless of
changes in the load. Stable operations
can be achieved.
The stable swash plate
enhances various operational
properties
Features
Energy-saving Type with
Drastically Reduced Loss
A NACHI-proprietary semi-circular bar-
rel swash plate that receives pressure
on its surface ensures a stable dis-
charge volume at all times. This elimi-
nates excess discharge volume, and
enables the effective use of power cor-
responding to the load cycle.
This "energy-saving type" conserves
energy, reduces power loss, and helps
to reduce hydraulic costs.
Silent Type That Demonstrates
Its Power Quietly
Proprietary low-noise mechanisms are
incorporated on the shoe, swash plate,
valve plate, and other locations to
ensure silent operation. In particular, a
semi-circular barrel swash plate stabi-
lizes operation characteristics to ensure
silent operation.
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 1
¡Handling
¡Cautions during Pump Installation
and Piping
zUse flexible couplings for connecting the
pump shaft to the drive shaft, and pre-
vent a radial or thrust load from being
applied on the pump shaft.
xFor centering of the pump shaft, limit the
eccentricity between the drive shaft and
hydraulic pump shaft to 0.05 mm, and
keep the angle error within 1°.
cSet the clamping length of couplings and
hy-draulic pump shafts so that it is within
at least 2/3 or more of the coupling width.
vUse a sufficiently rigid pump mounting
base.
bSet the pressure on the pump suction
side to -0.03 MPa or more (suction port
flow velocity within 2 m/sec).
nRaise part of the drain piping to above
the topmost part of the pump body, and
insert the return section of the drain pip-
ing into the hydraulic operating fluid.
Also, observe the values in the following
table to limit the drain back pressure to
0.1 MPa.
¡Management of Hydraulic Operating
Fluid
zUse good-quality hydraulic operating
fluid, and use within a kinematic viscosi-
ty range of 20 to 200 mm
2
/sec during
operation. Use an R&O type and wear-
resistant type of IS-OGV32 to 68 or
equivalent.
The optimum kinematic viscosity during
operation is 20 to 50 mm
2
/sec.
xThe operating temperature range is 5 to
60°C. When the oil temperature at start-
up is 5°C or less, warm up the hydraulic
pump by low-pressure, low-operation
speed operation until the oil temperature
reaches 5°C.
cProvide a suction strainer with a filtering
grade of about 100µm (150 mesh). Be
sure to provide a return line filter of
grade 20µm or less on the return line to
the tank. (When the hydraulic pump is
used at a high pressure of 14 MPa or
more, we recommend providing a filter
of 10µm or less.
vManage the hydraulic operating fluid so
that contamination is maintained at class
NAS10 or lower.
bUse hydraulic operating fluid within an
operating ambient temperature of 0 to
60°C.
¡Cautions at Startup
zBefore you start pump operation, fill the
pump body with clean hydraulic operating
fluid via the lubrication port.
xAn unload is required when the motor is
started under condition λ-Δ. Consult your
agent regarding the circuit.
cMake sure that the pump operates in the
direction of rotation the same as that indi-
cated by the arrow on the pump body.
vAir entering the pump or pipes may
cause noise or vibration. At startup, set
the pump discharge side to a noload
state, and operate the pump in the inch-
ing mode to release any air in the pump
or pipes.
bProvide an air bleed valve in circuits
where it is difficult to release air at start-
up.
¡How to Set Pressure and Discharge
Volume
The default pump discharge volume is
set to "maximum" and default discharge
pressure is set to "minimum". Change
the discharge volume and discharge
pressure settings according to your par-
ticular operating conditions.
P-2
Specifications
Model
No
.
Item
PVS-0B
PVS-1B
PVS-2B
Pipe joint size
3/8"
or more
1/2"
or more
Pipe I.D
φ
7.6 mm dia or
more
φ
12 mm
dia or more
Pipe length
1m or less 1m or less
Model No.
Volume
cm
3
/rev
(in
3
/rev)
Discharge volume at no-load r/min (gpm)
Pressure
adjustment range
MPa
(PSI)
Allowable
peak
pressure
MPa
(PSI)
Revolution
speed min
-1
Weight
Lb
1000min
-1
1200min
-1
1500min
-1
1800min
-1
Min. Max.
PVS-0B-8*0-E30
1
2
3
8.0
(0.49)
8.0
(2.1)
9.6
(2.5)
12.0
(3.2)
14.4
(3.8)
2
~
13.5 (286 ~ 500)
2
~
17.5 (286 ~ 1000)
3
~
14. (429 ~ 2000)
3
~
21. (429 ~ 3000)
25
(3643)
500 2000
17.0
PVS-1B-16*0-(*)-E13
1
2
3
16.5
(1.01)
16.5
(4.4)
19.8
(5.2)
24.7
(6.5)
29.7
(7.8)
2
~
13.5 (286 ~ 500)
2
~
17.5 (286 ~ 1000)
3
~
14. (429 ~ 2000)
3
~
21. (429 ~ 3000)
25
(3643)
500 2000
23.0
PVS-1B-22*0--(*)-E13
1
2
3
22.0
(1.34)
22.0
(5.8)
26.4
(7.0)
33.0
(8.7)
39.6
(10.5)
2
~
13.5 (286 ~ 500)
2
~
17.5 (286 ~ 1000)
3
~
14. (429 ~ 2000)
3
~
21. (429 ~ 3000)
25
(3643)
500 2000
23.0
PVS-2B-35*0--(*)-E13
1
2
3
35.0
(2.14)
35.0
(9.2)
42.0
(11.1)
52.5
(13.9)
63.0
(16.6)
2
~
13.5 (286 ~ 500)
2
~
17.5 (286 ~ 1000)
3
~
14. (429 ~ 2000)
3
~
21. (429 ~ 3000)
25
(3643)
500 2000
51.0
PVS-2B-45*0--(*)-E13
1
2
3--(*)-E20
45.0
(2.76)
45.0
(11.9)
54.0
(14.3)
67.5
(17.9)
81.0
(21.5)
2
~
13.5 (286 ~ 500)
2
~
17.5 (286 ~ 1000)
3
~
14. (429 ~ 2000)
3
~
21. (429 ~ 3000)
25
(3643)
500 2000
51.0
Note) 1. The standard direction of rotation is clockwise when viewed from the shaft end. Consult your agent separately for a counterclockwise direction of rotation.
2. A keyed straight shaft is standard. For details on spline shafts, consult your agent separately.
Model No.
Injection amount cm
3
PVS-0B-8 220
PVS-1B-16, 22 300
PVS-2B-35, 45 650
[Pressure adjustment]
Turning the pres-
sure adjusting
screw CW increas-
es the pressure.
[Discharge volume
adjustment]
Turning the flow
rate adjusting screw
CW decreases the
discharge volume.
Note)
· For details regarding the relationship between
flow rate adjustment length rand pump capacity
q, see the tables provided in the installation
dimension drawings for each of the pumps.
· Firmly tighten the lock nuts after you have fin-
ished adjustments.
CW
CCW
Pressure
adjustment range
Discharge
volume
Pressure
Discharge
volume
Discharge volume
adjustment range
CW
CCW
Pressure
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 2
P-3
132N16B1–– ––PVS
Design code 30: PVS-0B
12: PVS-1B, PVS-2B (Rc piping)
13: PVS-1B, PVS-2B (SAE piping)
20: PVS-2B-45N3
Pressure compensating range [See Note]
Control Type [See Note]
Max. volume cc/rev 8, 16, 22, 35, 45
(in
3
/rev 0.5, 1.0, 1.3, 2.1, 2.8)
Mounting B: flang mounting
A: Foot mounting
Pump size: 0, 1, 2
PVS series variable volume piston pump
Aux. symbol No code:
Z:
Side port type
Axial port type
No code:
E:
Rc for piping and metric for others
SAE for piping and metric for others
( )
Explanation of model No
❚
NQ, RS, WS, RQS and CS types are not available for the PVS-0B-8, and the NQ, RQS and CS types are not available
for the PVS-1B-
16
22
-Z and PVS-2B-
35
45
-Z.
[Note]
¡Variable control mechanism
Standard type
N* :
Pressure compensation type (manual
mode)
Option type
P* :
Pressure compensation type (remote
control mode)
N*Q* :
2-pressure, 2-flow rate control
R*
A
&
*
:
Solenoid cutoff control
S
W*
A
&
*
:
2-pressure control
S
RQ*
A
&
*
:
2-pressure, 2-flow rate
S
control w/ solenoid cutoff
C*
A
&
*
:
2-cutoff control
S
¡* :
Pressure adjustment range
0 : 2 ~ 3.5MPa {286 ~ 500psi}
1 : 2 ~ 7MPa {286 ~ 1000psi}
2 : 3 ~ 14MPa {429 ~ 2000psi}
3 : 3 ~ 21MPa {429 ~ 3000psi}
¡&
*
:
Applicable to solenoid specifications A, S
A&
*
: SA-G01
S
&
*
: SS-G01
1 : 100V 50/60Hz
2 : 200V 50/60Hz
3 : DC12V
4 : DC24V
5 : AC115V 60Hz
6 : AC230V 60Hz
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 3
P-4
Variable Control Mechanisms
Standard type
Option type
Symbol
External View Characteristics Hydraulic Circuit Explanation
N
NACHI
Drain port
Pressure
adjusting screw
Flow rate
adjusting screw
Discharge volume
Discharge pressure
0
M
*
*
Discharge
port
Suction
port
Drain
port
Pressure compensation type
(manual system)
When the discharge pressure
reaches the preset volume
set by the pressure compen-
sator, the discharge volume is
automatically reduced to hold
the pressure at the set pres-
sure.
P
NACHI
Drain port
Flow rate
adjusting screw
Pilot port
Differential pressure
adjusting screw
(adjustment forbidden)
Discharge volume
Discharge pressure
0
M
*
*
Pilotport
Discharge
port
Suction
port
Drain
port
Pressure compensation type
(remote control mode)
This mode demonstrates the
same characteristics as the
manual mode.
The discharge pressure can be
adjusted by external pilot pres-
sure. The discharge volume can
be adjusted manually. Note 2)
NQ
NACHI
P1 pressure adjusting screw
q1 flow rate adjusting screw
q2 flow rate
adjusting screw
P2 pressure
adjusting screw
Drain port
q
2
q
1
P1
P2
Discharge volume
Discharge pressure
0
M
N
*
*
Discharge port
Suction
port
Drain
port
2-pressure, 2-flow rate control
type
The discharge volume
changes in two stages by the
pump's built-in sequence
valve. This allows convention-
al high/ low pressure control
to be performed on a single
pump unit, and save energy in
the hydraulic circuit.
RS
(RA)
SOL b
NACHI
Drain port
Pressure
adjusting screw
(at solenoid ON)
Flow rate
adjusting screw
SOL
"OFF"
SOL
"ON"
Discharge volume
Discharge pressure
0
M
*
*
Discharge port
Suction
port
Drain
port
Solenoid cutoff control type
A solenoid valve for unload is
integrated into the pressure
compensation type to mini-
mize energy loss when pump
output is not required. Only a
slight amount of heat is gen-
erated.
WS
(WA)
NACHI
Drain port
Pressure
adjusting screw
(at solenoid OFF)
Flow rate
adjusting screw
Pressure
adjusting screw
(at solenoid ON)
SOL b
SOL
"OFF"
P1
P2
SOL
"ON"
Discharge volume
Discharge pressure
0
M
*
*
Discharge port
Suction
port
Drain
port
2-pressure control type
Two pressure compensation
types can be obtained by switch-
ing the solenoid valve ON/OFF.
Two types of output control are
possible with the actuator set to
a constant speed.
RQS
(RQA)
SOL b
NACHI
Drain port
P1 pressure adjusting screw
P2 pressure
adjusting screw
(at solenoid ON)
q1 flow rate
adjusting screw
q2 flow rate
adjusting screw
P2
q1
q2 P1
SOL OFF
SOL ON
Discharge volume
Discharge pressure
*
*
0
M
N
Discharge port
Suction
port
Drain
port
2-pressure, 2-flow rate control
type w/ solenoid cutoff
The discharge volume can be
changed in two stages by the
sequencer valve and solenoid
valve for unload mounted on
the pump, and unloading is
possible when pressure oil is
not required.
CS
(CA)
NACHI
Drain port
P2 pressure adjusting screw
q1 flow rate adjusting screw
q2 flow rate
adjusting screw
Differential pressure
adjusting screw
(adjustment forbidden)
q1
q2
P1
P2
SOL OFF
SOL ON
Discharge volume
Discharge pressure
*
*
0
M
N
Discharge port
Suction
port
Drain
port
2-cutoff control type
Two types of pressure - flow
rate characteristics can be
obtained by the solenoid
valve and cylinder mounted
on the pump.
Note 1) Many other variable control mechanism are also available in addition to those in the above table. Please consulat your agent for details.
Note 2) We recommend ZR-T02-*-5895* as the remote control valve. For details, consult your agent. Prevent the pipe volume up to the remote control valve from falling
below 150cm
3
.
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 4
P-5
Manual mode: standard type
Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm
2
/s
PVS-0B-8N*-E30
List of Sealing Parts
Pressure Compensation Type
Installation Dimension Drawing
Cross-sectional Drawing
Performance Curves
3231 31 32813
7
964
14
19
30
5
22936
37
39
40
33 34 27 17 22 25 16 20 10 3538 28 15 12 11 24 26 21 18
Part No.
Part Name
Part No.
Part Name
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Body
Case
Shaft
Cylinder barrel
Valve plate
Piston
Shoe
Shoe holder
Barrel holder
Swash plate
Thrust bush
Spring holder
Gasket
Spring C
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Spring S
Control piston
Guide pin
Parallel key
Retainer
Needle
Ball bearing
Needle bearing
Oil seal
Snap ring
Snap ring
Snap ring
O-ring
O-ring
29
30
31
32
33
34
35
36
37
38
39
40
Parallel pin
Spring pin
Hexagon socket head bolt
Cross-recessed coun-
tersunk head screw
Hexagon socket
set screw
Hexagon nut
Hexagon plug
Metal plug
Nameplate
Lubrication port plate
CAUTION plate
Rivet
Parts marked by an asterisk "*" are not available on the market.
Consult your agent.
10
10
8
6
4
2
3
515
PVS-0B-8N -30
cm
3
/rev
Relationship between flow rateadjustme
length ( ) and pump capacity (q)
Pump capacity q cm
3
/rev
Flow rate adjustment range
Flow rate adjustment length mm
Set a flow rate adjustment length within
the above range. Oil will leak if the pump
is operated below the adjustment range
lower limit.
Part
No.
Part Name Q'ty
PVS-0B-8
Size Remarks
13 Packing 1 PS46-100000 3 Bond
23 Oil seal 1 TCV-254511 N.O.K
27 O-ring 1 1B-P9 JIS B 2401
28 O-ring 1 1B-P11 JIS B 2401
Efficiency Curves
Pressure-Flow Curves
Input Power Curves
Input Power at Deadhead
Noise Level
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 5
P-6
Installation Dimension Drawing
Cross-sectional Drawing
PVS-1B-
16
N*-E13 (Side Port Type)
22
PVS-1B-
16
N*-Z13 (Axial Port Type)
22
Parts marked by an asterisk "*" are not available on the market.
Consult your agent.
List of Sealing Parts
Part No.
Part Name
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Body
Case
Shaft
Cylinder barrel
Valve plate
Piston
Shoe
Shoe holder
Barrel holder
Swash plate
Thrust bush
Seal holder
Gasket
Spring C
Spring S
Control piston
Needle
Key
Nut
Retainer
Plug
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
Ball bearing
Needle bearing
Oil seal
Snap ring
Snap ring
Snap ring
O-ring
O-ring
O-ring
Pin
Hexagon socket head bolt
Cross-recessed coun-
tersunk head screw
Hexagon socket set screw
Metal plug
Nameplate
CAUTION plate
Spring holder
Lubrication port plate
Rivet
Guide pin
Part No.
Name Q'ty Size Remarks
13 Gasket 1 PS46-101000
Nihon Gasket
24 Oil seal 1 TCN-254511 N.O.K
28 O-ring 1 1B-G55 JIS B 2401
29 O-ring 1 1B-P9 JIS B 2401
30 O-ring 1 1B-P14 JIS B 2401
10
7616
5
31
29
27
1222
111389
17
23
2 2026 14 4
2135
19
34
18
3
24
252815 39 303841
33 32
36
40
371
The relation between flow adjusting
length (
r
) and pump displacement
(q)
Pump Displacement
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 6
P-7
Performance Curves
Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm
2
/s
PVS-1B-16N*-(Z)-E13
Performance Curves
Typical characteristics at hydraulic oper-
ating fluid kinematic viscosity of 32 mm
2
/s
PVS-1B-22N*-(Z)-E13
Oil ISO VG 32 Oil temp. 50°C (122°F)
Oil ISO VG 32 Oil temp. 50°C (122°F)
Efficiency Curves
Pressure-Flow Curves
Efficiency Curves
Pressure-Flow Curves
Input Power at Deadhead
Noise Level
Oil Temperature Rise Curves
Input Power Curves
Input Power at Deadhead
Noise Level
Input Power Curves
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 7
P-8
Installation Dimension Drawing
PVS-2B-
35
N*-(Z)-
E13
45 E20
Cross-sectional Drawing
PVS-2B-
35
N*-
E13
(Side Port Type)
45 E20
PVS-2B-
35
N*-Z-
E13
(Axial Port Type)
45 E20
PVS-2B-45N3-(Z)-20
Part
No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Body
Case
Shaft
Cylinder barrel
Valve plate
Piston
Shoe
Shoe holder
Barrel holder
Swash plate
Thrust bush
Seal holder
Gasket
Spring C
Spring S
Part
No.
Part Name
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Control piston
Needle
Key
Nut
Retainer
Plug
Ball bearing
Needle bearing
Oil seal
Snap ring
Snap ring
Snap ring
O-ring
O-ring
O-ring
Part
No.
Part Name
31
32
33
34
35
36
37
38
39
40
41
42
43
Backup ring
Pin
Hexagon socket
head bolt
Cross-recessed coun-
tersunk head screw
Flow rate adjust-
ing screw
Metal plug
Nameplate
CAUTION plate
Spring holder
Guide
Lubrication port
Orifice
Rivet
List of Sealing Parts
Part
No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Body
Case
Shaft
Cylinder barrel
Valve plate
Piston
Shoe
Shoe holder
Barrel holder
Swash plate
Thrust bush
Seal holder
Gasket
Spring C
Spring S
Control piston
Part
No.
Part Name
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Needle
Key
Nut
Retainer
Plug
Roller bearing
Needle bearing
Oil seal
Snap ring
Snap ring
Snap ring
O-ring
O-ring
O-ring
Backup ring
Pin
List of Sealing Parts
Part
No.
Part Name
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
Hexagon socket head bolt
Cross-recessed coun-
tersunk head screw
Flow rate adjusting screw
Metal plug
Nameplate
CAUTION plate
Spring holder
Guide
Lubrication port plate
Orifice
Rivet
Orifice
Pin
O-ring
Plug
Parts marked by an asterisk "*" are not available on the market. Consult your agent.
Parts marked by an asterisk "*" are not available on the market. Consult your agent.
24.9
_
0
0.5
Part No. Part Name Q'ty
PVS-2B-35/45
Size Remarks
13 Gasket 1
*
Nihon Gasket
24 Oil seal 1
TCN-305011Z
N.O.K
28 O-ring 1 1B-G70 JIS B 2401
29 O-ring 1 1B-P14 JIS B 2401
30 O-ring 1 1B-P11 JIS B 2401
31 Backup ring 1 T2-P11 JIS B 2407
Part No. Part Name Q'ty
PVS-2B-45N3
Size Remarks
13 Gasket 1
*
Nihon Gasket
24 Oil seal 1
TCN-305011Z
N.O.K
28 O-ring 1 1B-G70 JIS B 2401
29 O-ring 1 1B-P14 JIS B 2401
30 O-ring 1 1B-P11 JIS B 2401
46 O-ring 2 1B-P5 JIS B 2401
31 Backup ring 1 T2-P11 JIS B 2407
18
3
25281222
15
39 21 2976173616423230311935
40
23
237 5 27 14 4 20 9 8 13 10 11 34 26 24 1
41
33 38
43
18
3
252812221539 21 2976173616423230311935
40
23
237 5 27 14 4 20 9 8 13 10 11 34 26 24 1
41
3833
43
45
44
46
47
Shaft
dimension
mm (inch)
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 8
P-9
Performance Curves
Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm
2
/s
PVS-2B-35N*-(Z)-E13
Performance Curves
Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm
2
/s
PVS-2B-45N*-(Z)-E13, E20
Efficiency Curves
Pressure-Flow Curves
Input Power Curves
Input Power at Deadhead
Noise Level
Efficiency Curves
Pressure-Flow Curves
Input Power Curves
Input Power at Deadhead
Noise Level
Oil ISO VG 32 Oil temp. 50°C (122°F)
Oil ISO VG 32 Oil temp. 50°C (122°F)
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 9
P-10
Response Performance
Pressure Compensator
Model No.
Response Time (s) Surge Pressure MPa{kgf/cm
2
}
t1 t2 PS
PVS-0B-8 0.03 ~ 0.04 0.04 ~ 0.06 12 ~ 4{20.4 ~ 40.8}
PVS-1B-16 0.05 ~ 0.06 0.07 ~ 0.08 14 ~ 7{40.8 ~ 71.4}
PVS-1B-22 0.05 ~ 0.06 0.07 ~ 0.08 15 ~ 8{51 ~ 81.6}
PVS-2B-35 0.05 ~ 0.06 0.05 ~ 0.07 16 ~ 9{61.2 ~ 91.8}
PVS-2B-45 0.05 ~ 0.06 0.05 ~ 0.07 16 ~ 9{61.2 ~ 91.8}
0
M
M
Ps
14MPa
1MPa 1MPa
FC
SOL ON
SOL OFFSOL OFF
MPa
Time s
(Q=0)
(Q=MAX)
Q
t1
t2
Test Circuit
Piping volume 400 cm
3
Pressure MPa
Legend
Response performance changes according to pipe volume and size.
Use an anti-surging valve to prevent surge voltage.
Note) O-ring 1A/B-** refers to JIS B2401-1A/B.
List of Sealing Parts
Part
No.
Name Q'ty
Size
For 0B, 1B, 2B
9 O-ring 1 1A-P14
10 O-ring 3 1B-P6
11 O-ring 1 1B-P10
Part No.
Part Name
Part No.
Part Name
1
2
3
4
5
6
7
Body
Spool
Holder
Plunger
Spring
Retainer
Pressure adjusting bolt
8
9
10
11
12
13
14
Nut
O-ring
O-ring
O-ring
Plug
Plug
Mounting bolt
7
8649113
14
532101112
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 10
P-11
Pressure Compensation Type
remote control mode
PVS-0B-8P*-E30
PVS-2B-
35
P*-E13, E20
45
PVS-1B-
16
P*-E13
22
1/4"SAE
NACHI
3/8"SAE
4–M10x16
5(0.19)25.4
(1.00)
12.5(0.49)
158(6.22)
6(0.23)
49.5(1.94)77(3.03)
181(7.12)
55(2.16)
43(1.69)
236(9.29)(MAX)
r
Flow rate adjust-
ment length
Flow rate adjust-
ing screw
Pilot port
Drain port
Key width
Differential pressure adjusting screw
(adjustment forbidden)
φ
82.6
( )
–0.036
–0.071
3.250
3.249
21.2
( )
–0.03
–0.25
0.834
0.824
φ
19.05
( )
–0.036
–0.021
0.750
0.749
4.76
( )
0
–0.012
0.187
0.186
22
( )
±0.2
0.874
0.858
22
( )
47.5
±0.2
1.877
1.862
24
(0.94)
φ
Explanation of model No.:
Pressure adjustment range
0: 2- 3.5MPa {286-500psi}
1: 2- 7MPa {286-1000psi}
2: 3-14MPa {429-2000psi}
3: 3-21MPa {429-3000psi}
P: Pressure compensation type (remote control mode)
Max. pump capacity (cm
3
/rev)
Nominal 8, 16, 22, 35, 45 (in
3
/rev 0.5, 1.0, 1.3, 2.1, 2.8)
Pump size 0, 1, 2
Design No.
E30: PVS-0
*
E13: PVS-1
*
, PVS-2
*
E20: PVS-2
*
-45P3 only
E30P8B0–– –PVS
SAEJ518b-1
1/4
SAEJ518b-1
1/4"SAE
NACHI
1/2"SAE
4–M10x16
144(5.66)
146(5.74)
172(6.77)
65(2.55)
13(0.51)
45(1.77)
104(4.09)
172(6.77)
3(0.11)
53(2.08)
3
(0.10)
38(1.49)
60(2.36)
6(0.23)
192(7.55)
15(0.69)
88(3.46)
317(12.48)(MAX)
222(8.74)
69.5(2.73)
r
A
B
A
B
in
3
/rev
0 3
0 2
3
13D
20D
2.1
2.8
Pilot port pp
Lock nut
Drain port
Flow rate
adjusting screw
Differential pressure
adjusting screw
(adjustment forbidden)
Lubrication port
Discharge port
Suction port
Pressure
Range
Design
No.
Flow rate
adjustment
length
Key width
4.76
( )
6.3
+0.015
–0.010
0.248
0.247
22
( )
26.2
±0.2
1.039
1.023
22
( )
52.4
±0.2
2.070
2.055
22
( )
24.9
00
–
0.5
0.980
0.960
22
( )
27.85
00
–
0.25
1.096
1.086
φ
22
( )
25.385
00
–
0.025
0.999
0.998
22
( )
22.23
00
–
0.021
0.875
0.843
φ
φ
82.6
( )
101.6
0
–0.051
4.000
3.997
28
(1.10)
φ
P-Q Characteristics
Set by remote
control V
Max. pump capacity q
cm
3
/rev
Discharge pressure P MPa
Installation Dimension Drawing
SAEJ518b-3/4 SAEJ518b-1
106.4(4.18)
130(5.11)
52(2.04)
11
(0.43)
73(2.87)
88(3.46)
42(1.65)
124(4.88)
82(3.22)
137(5.39)
3
(0.11)
60(2.36)
Lubrication port
Discharge port
Suction port
1/2"SAE
3/8"SAE
1/4"SAE
11(0.43)
164.5(6.74)
(
MAX
)
6(0.23)
149.5(5.88)
127.5(5.01)
49.5(1.94)
5(0.19)
25.4
(1.00)
214(8.42)
(
MAX
)
42.5(1.69)
5(0.19)
10(0.39)
93.5(3.68)
18
(0.70)
r
(flow rate adjust-
ment length)
Pilot port
Drain port
Lock nut
Flow rate
adjusting screw
Discharge port
Discharg
1/2"SAE
Key width
4.76
( )
0
–0.012
0.187
0.186
φ
82.6
( )
–0.036
–0.071
3.250
3.249
21.2
( )
–0.03
–0.25
0.834
0.824
φ
19.05
( )
–0.036
–0.021
0.750
0.749
3/4"SAE
142(5.59)
77(3.03)
29(1.14)
110(4.33)
130(5.11)
R46(1.81)
106.4(4.18)
49(1.92)
11(0.43)
47(1.85)
78(3.07)
53.2(2.09)
132(5.19)
6(0.23)
3(0.11)
Discharge port
Suction port
Lubrication port
1/2"SAE
width
( )
012
0.187
0.186
φ
82.6
( )
–0.036
–0.071
3.250
3.249
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 11
P-12
2-pressure, 2-flow Rate Control Type
PVS-1B-
16
N*Q*-E13
22
PVS-2B-
35
N*Q*-E13, E20
45
(MIN)
NACHI
3/8"SAE
4–M10x16
SAEJ518b-3/4 SAEJ518b-1
5
(0.19)
25.4
(1.00)
12.5(0.49)
158(6.22)
6(0.23)
77(3.03)
181(7.12)
49.5(1.94)
43(1.69)
296(11.65)(MAX)
23(0.90)
106.4(4.18)
130(5.11)
52(2.04)
11(0.43)
73(2.87)
88(3.46)
42(1.65)
124(4.88)
82(3.22)
137(5.39)
3
(0.11)
107.5(4.23)(MAX)
Drain port
P2 pressure
adjusting screw
q1 flow rate
adjusting screw
q2 flow rate
adjusting screw
Key width
Pressure compensator
Lubrication port
P1 pressure
adjusting screw
Discharge port
Suction port
φ
82.6
( )
–0.036
–0.071
3.250
3.249
21.2
( )
–0.03
–0.25
0.834
0.824
φ
19.05
( )
–0.036
–0.021
0.750
0.749
4.76
( )
0
–0.012
0.187
0.186
22
( )
±0.2
0.874
0.858
22
( )
47.5
±0.2
1.877
1.862
24
(0.94)
φ
NACHI
1/2"SAE
4–M10x16
SAEJ518b-1
1/4
SAEJ518b-1
53(2.08)
3
(0.11)
38(1.49)
6(0.23)
192(7.55)
15(0.69)
88(3.46)
222(8.74)
352(13.85)(MAX)
60(2.36)
60(2.36)(Min)
144(5.66)
146(5.74)
172(6.77)
65(2.55)
13(0.51)
45(1.77)
107.5(4.23)(MAX)
104(4.09)
3
(0.11)
172(6.77)
A
B
Drain port
P2 pressure
adjusting screw
q1 flow rate
adjusting screw
q2 flow rate
adjusting screw
Key width
Pressure compensator
Lubrication port
P1 pressure
adjusting screw
Discharge port
Suction port
A
B
in
3
/rev
0 3
0 2
3
13D
20D
2.1
2.8
Pressure
Range
Design
No.
22
( )
24.9
00
–
0.5
0.980
0.960
22
( )
27.85
00
–
0.25
1.096
1.086
φ
22
( )
25.385
00
–
0.025
0.999
0.998
22
( )
22.23
00
–
0.021
0.875
0.843
φ
φ
82.6
( )
101.6
0
–0.051
4.000
3.997
4.76
( )
6.3
+0.015
–0.010
0.248
0.247
22
( )
26.2
±0.2
1.039
1.023
22
( )
52.4
±0.2
2.070
2.055
28
(1.10)
φ
NQ: 2-pressure, 2-flow rate control
Max. pump capacity (cm
3
/rev)
Nominal 16, 22, 35, 45 (in
3
/rev 1.0, 1.3, 2.1, 2.8)
Pump size 1, 2
Pressure adjustment range N
*
: High-pressure adjustment range, P2
Q
*
: Low-pressure adjustment range, P1
0: 2- 3.5MPa {286-500psi}
1: 2- 7MPa {286-1000psi}
2: 3-14MPa {429-2000psi}
3: 3-21MPa {429-3000psi}
E1331QN16B1–– –
E13: PVS-1
*
, PVS-2
*
E20: PVS-2
*
-45N3Q
*
Design No.
Explanation of model No.:
PVS
Pump Model No. q2 Adjustment Range (in
3
/rev) Default q2 (Setting in
3
/rev)
PVS-1B-16 0 ~ 0.6 0.20
PVS-1B-22 0 ~ 0.8 0.26
PVS-2B-35 0 ~ 1.1 0.42
PVS-2B-45 0 ~ 1.4 0.54
Note 1)
The setting range of maximum pump capacity q
1
varies according to the setting of q
2
.
Note 2) Overall efficiency at a low flow rate is worse than at the maximum flow rate. Pay
attention to this when selecting the motor capacity for the drive.
Installation Dimension Drawing
P1
q
1
q
2
0P2
P1
q
1
q
2
0P2
P-Q Characteristics
Discharge pressure P MPa
Pump capacity q
cm
3
/rev (Note 2)
P-Q Characteristics
Discharge pressure P MPa
Pump capacity q
cm
3
/rev (Note 2)
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 12
P-13
Solenoid Cutoff Control Type
PVS-1B-
16
R*
A
*-E13
22 S
PVS-2B-
35
R*
A
*-E13, E20
45 S
❚
The coil surface temperature increases if this pump is kept continuously energized.
Do not touch the surface of the coil directly with your hands.
SAEJ518b-3/4
SAEJ518b-1
SOL b
NACHI
3/8"SAE
4–M10x16
106.4(4.18)
130(5.11)
52(2.04)
11(0.43)
124(4.88)
82(3.22)
137(5.39)
3(0.11)
108(4.25)
213(8.38)(SS-G01)
177(6.93)(SA-G01)
42(1.65)
5(0.19)
25.4
(1.00)
12.5(0.49)
158(6.22)
6(0.23)
77(3.03)
181(7.12)
55(2.16)
43(1.69)
47.4(1.86)
49.5(1.94)
199.8(7.86)
Pressure adjusting
screw
(at solenoid ON)
Drain port
Flow rate adjusting
screw
Lubrication
port
Discharge port
Suction port
Differential pressure
adjusting screw
(adjustment forbidden)
Key width
4.76
( )
0
–0.012
0.187
0.186
φ
82.6
( )
–0.036
–0.071
3.250
3.249
21.2
( )
–0.03
–0.25
0.834
0.824
φ
19.05
( )
–0.036
–0.021
0.750
0.749
24
(0.94)
φ
22
( )
±0.2
0.874
0.854
22
( )
47.5
±0.2
1.877
1.862
SAEJ518b-1
1/4
1/4"SAE
NACHI
SOL b
1/2"SAE
144(5.66)
146(5.74)
172(6.77)
65(2.55)
13(0.51)
45(1.77)
194.5(7.65)(SA-G01)
230.5(9.07)(SS-G01)
90.5(3.56)
104(4.09)
3(0.11)
172(6.77)
53(2.08)
3
(0.11)
38(1.49)
60(2.36)
6(0.23)
192(7.55)
15(0.69)
88(3.46)
317(12.48)(MAX)
222(8.74)
69.5(2.73)
SAEJ518b-1
A
B
4–M10x16
Pressure adjusting
screw
(at solenoid ON)
Lock nut
Flow rate adjust-
ing screw
Pilot port
Drain port
Differential pressure
adjusting screw
(adjustment forbidden)
Key width
Differential pressure
adjusting screw
(adjustment forbidden)
Lubrication port
Suction port
Discharge port
A
B
in
3
/rev
0 3
0 2
3
13D
20D
2.1
2.8
Pressure
Range
Design
No.
22
( )
24.9
00
–
0.5
0.980
0.960
22
( )
27.85
00
–
0.25
1.096
1.086
φ
22
( )
25.585
00
–
0.025
0.999
0.998
22
( )
22.23
00
–
0.021
0.875
0.843
φ
4.76
( )
6.3
+0.015
–0.010
0.248
0.247
22
( )
26.2
±0.2
1.039
1.023
22
( )
52.4
±0.2
2.070
2.055
φ
82.6
( )
101.6
0
–0.051
4.000
3.997
28
(1.10)
φ
Pressure adjustment range
0: 2- 3.5MPa {286-500psi}
1: 2- 7MPa {286-1000psi}
2: 3-14MPa {429-2000psi}
3: 3-21MPa {429-3000psi}
R : Solenoid cutoff control
A
S
Max. pump capacity (cm
3
/rev)
Nominal 16, 22, 35, 45 (in
3
/rev 1.0, 1.3, 2.1, 2.8)
Pump size 1, 2
1: AC110-115V
2: AC220-230V
3: DC12V
4: DC24V
Solenoid power supply
A: SA-G01
S: SS-G01
Solenoid specifications
E1321SR16B1–– –
Explanation of model No.:
PVS
Installation Dimension Drawing
SOL
"ON"
SOL
"OFF"
P-Q Characteristics
Discharge pressure P MPa
Pump capacity q
cm
3
/rev
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 13
P-14
2-pressure Control Type
PVS-1B-
16
W*
A
*-E13
22 S
PVS-2B-
35
W*
A
*-E13, E20
45 S
❚
The coil surface temperature increases if this pump is kept continuously energized.
Do not touch the surface of the coil directly with your hands.
SOL b
NACHI
3/8"SAE
4–M10x16
SAEJ518b-3/4
5(0.19)
25.4
(1.00)
12.5(0.49)
158(6.22)
6(0.23)
77(3.03)
181(7.12)
55(2.16)
43(1.69)
49.5(1.94)
106.4(4.18)
130(5.11)
52(2.04)
11(0.11)
42(1.65)
124(4.88)
82(3.22)
137(5.39)
3
(0.11)
127(5.00)
231(9.09)(SS-G01)
195(7.69)(SA-G01)
Pressure adjusting
screw
(at solenoid OFF)
Flow rate
adjusting screw
Drain port
Pressure adjusting screw
(at solenoid ON)
Discharge port
Suction port
SAEJ518b-1
Lubrication port
Differential pressure
adjusting screw
(adjustment forbidden)
Key width
4.76
( )
0
–0.012
0.187
0.186
φ
82.6
( )
–0.036
–0.071
3.250
3.249
21.2
( )
–0.03
–0.25
0.834
0.824
φ
19.05
( )
–0.036
–0.021
0.750
0.749
22
( )
±0.2
0.874
0.854
22
( )
47.5
±0.2
1.877
1.862
24
(0.94)
φ
SAEJ518b-1
1/4
1/2"SAE
NACHI
SOL b
1/2"SAE
4–M10x16
144(5.66)
146(5.74)
172(6.77)
65(2.55)
13(0.51)
45(1.77)
90.5(3.56)
104(4.09)
3(0.11)
172(6.77)
53(2.08)
3(0.11)
38(1.49)
60(2.36)
6(0.23)
192(7.55)
15(0.59)
88(3.46)
317(12.48)(MAX)
222(8.74)
69.5(2.73)
A
B
SAEJ518b-1
212.5(8.36)(SA-G01)
248.5(9.78)(SS-G01)
Pressure adjusting
screw
(at solenoid OFF)
Lock nut
Flow rate adjusting
screw
Pilot port pp
Drain port
Pressure adjusting
screw (at solenoid ON)
Differential pressure
adjusting screw
(adjustment forbidden)
Key width
Differential pressure
adjusting screw
(adjustment forbidden)
Lubrication port
Discharge port
Suction port
A
B
in
3
/rev
0 3
0 2
3
13D
20D
2.1
2.8
Pressure
Range
Design
No.
22
( )
24.9
00
–
0.5
0.980
0.960
22
( )
27.85
00
–
0.25
1.096
1.086
φ
22
( )
25.585
00
–
0.025
0.999
0.998
22
( )
22.23
00
–
0.021
0.875
0.843
φ
4.76
( )
6.3
+0.015
–0.010
0.248
0.247
22
( )
26.2
±0.2
1.039
1.023
22
( )
52.4
±0.2
2.070
2.055
φ
82.6
( )
101.6
0
–0.051
4.000
3.997
28
(1.10)
φ
Pressure adjustment range
0: 2- 3.5MPa {286-500psi}
1: 2- 7MPa {286-1000psi}
2: 3-14MPa {429-2000psi}
3: 3-21MPa {429-3000psi}
W : 2-pressure control
A
S
Max. pump capacity (cm
3
/rev)
Nominal 16, 22, 35, 45 (in
3
/rev 1.0, 1.3, 2.1, 2.8)
Pump size 1, 2
1: AC110-115V
2: AC220-230V
3: DC12V
4: DC24V
Solenoid power supply
A: SA-G01
S: SS-G01
Solenoid specifications
E1321SW16B1–– –
Explanation of model No.:
PVS
Installation Dimension Drawing
SOL
"ON"
SOL
"OFF"
P
1 P2
P-Q Characteristics
Discharge pressure P MPa
Pump capacity q
cm
3
/rev
01P_Piston(P01-14)_E.q 07.6.7 4:16 PM Page 14
P-15
2-pressure, 2-flow rate Control Type w/ Solenoid Cutoff
PVS-1B-
16
RQ*
A
*-E13
22 S
PVS-2B-
35
RQ*
A
*-E13(E20)
45 S
❚
The coil surface temperature increases if this pump is kept continuously energized.
Do not touch the surface of the coil directly with your hands.
SOL b
NACHI
3/8"SAE
5(0.19)
25.4
(1.00)
12.5(0.49)
158(6.22)
6(0.23)
23
(0.90)
77(3.03)
181(7.12)
49.5(1.94)
43(1.69)
221(8.70)
296(11.65)(MAX)
106.4(4.18)
130(5.11)
52(2.04)
11(0.43)
124(4.88)
82(3.22)
137(5.39)
3
(0.11)
42(1.65)
107.5(4.23)(MAX)
4–M10x16
SAEJ518b-3/4 SAEJ518b-1
213(8.38)(SS-G01)
177(6.96)(SA-G01)
P2 pressure adjusting
screw
(at solenoid ON)
Drain port
q1 flow rate
adjusting screw
q2 flow rate
adjusting screw
Differential pressure
adjusting screw
(adjustment forbidden)
Lubrication port
P1 pressure
adjusting screw
Discharge port
Suction port
Key width
4.76
( )
0
–0.012
0.187
0.186
22
( )
±0.2
0.874
0.854
22
( )
47.5
±0.2
1.877
1.862
24
(0.94)
φ
φ
82.6
( )
–0.036
–0.071
3.250
3.249
21.2
( )
–0.03
–0.25
0.834
0.824
φ
19.05
( )
–0.036
–0.021
0.750
0.749
SOL b
NACHI
1/2"SAE
144(5.66)
146(5.74)
172(6.77)
65(2.55)
45(1.77)
13(0.51)
90.5(3.56)
107.5(4.23)(MAX)
104(4.09)
3(0.11)
172(6.77)
53(2.08)
3(0.10)38(1.49)
6(0.23)
192(7.55)
15(0.59)
88(3.46)
222(8.74)
352(13.89)(MAX)
60(2.36)
4–M10x16
A
B
194.5(7.65)(SA-G01)
230.5()9.07(SS-G01)
SAEJ518b-1
1/4
SAEJ518b-1
Pressure adjusting
screw (at solenoid ON)
q1 flow rate
adjusting screw
q2 flow rate
adjusting screw
Drain port
Key width
Lubrication port
P1 pressure
adjusting screw
Discharge port
Suction port
Differential pressure
adjusting screw
(adjustment forbidden)
A
B
in
3
/rev
0 3
0 2
3
12D
20D
2.1
2.8
Pressure
Range
Design
No.
22
( )
24.9
00
–
0.5
0.980
0.960
22
( )
27.85
00
–
0.25
1.096
1.086
φ
22
( )
25.585
00
–
0.025
0.999
0.998
22
( )
22.23
00
–
0.021
0.875
0.843
φ
4.76
( )
6.3
+0.015
–0.010
0.248
0.247
22
( )
26.2
±0.2
1.039
1.029
22
( )
52.4
±0.2
2.070
2.055
φ
82.6
( )
101.6
0
–0.051
4.000
3.997
28
(1.10)
φ
Pressure adjustment range
0: 2- 3.5MPa {286-500psi}
1: 2- 7MPa {286-1000psi}
2: 3-14MPa {429-2000psi}
3: 3-21MPa {429-3000psi}
RQ : 2-pressure, 2-flow rate control w/
solenoid cutoff
A
S
Max. pump capacity (cm
3
/rev)
Nominal 16, 22, 35, 45 (in
3
/rev 1.0, 1.3, 2.1, 2.8)
Pump size 1, 2
1: AC110-115V
2: AC220-230V
3: DC12V
4: DC24V
Solenoid power supply
A: SA-G01
S: SS-G01
Solenoid specifications
E1321SRQ16B1–– –
Explanation of model No.:
PVS
Installation Dimension Drawing
SOL "ON"
SOL "OFF"
Discharge pressure P MPa
Pump capacity q
cm
3
/rev
P-Q Characteristics
01P_Piston(P15-20)_E.q 07.6.7 4:14 PM Page 15
P-16
2-cutoff Control Type
PVS-1B-
16
C*
A
*-E13
22 S
PVS-2B-
35
C*
A
*-E13(E20)
45 S
❚
The coil surface temperature increases if this pump is kept continuously energized.
Do not touch the surface of the coil directly with your hands.
NACHI
3/8"SAE
4–M10x16
5(0.19)
25.4
(1.00)
12.5(0.49)
158(6.22)
6(0.23)
77(3.03)
181(7.12)
49.5(1.94)
43(1.69)
331(13.03)(SS-G01)
25
(0.98)
295(11.61)(SA-G01)
296(11.65)(MAX)
106.4(4.18)
130(5.11)
52(2.04)
11(0.43)
124(4.88)
82(3.22)
137(5.39)
3(0.11)
42(1.65)
88(3.46)
80(3.14)
102(4.05)
SAEJ518b-3/4
Suction port
q1 flow rate adjusting screw
q2 flow rate adjusting screw
Drain port
Lubrication port
Discharge port
P1 pressure
adjusting screw
SAEJ518b-1
1/4
Differential pressure
adjusting screw
(adjustment forbidden)
Key width
4.76
( )
0
–0.012
0.187
0.186
φ
82.6
( )
–0.036
–0.071
3.250
3.249
21.2
( )
–0.03
–0.25
0.834
0.824
φ
19.05
( )
–0.036
–0.021
0.750
0.749
24
(0.94)
φ
22
( )
±0.2
0.874
0.854
22
( )
47.5
±0.2
1.877
1.862
NACHI
1/2"SAE
4–M10x16
144(5.66)
146(5.74)
172(6.77)
65(2.55)
45(1.77)
13(0.51)
90.5(3.56)
102(4.01)
104(4.09)
3
(0.11)
172(6.77)
53(2.08)
3(0.10)38(1.49)
6(0.23)
192(7.55)
15(0.59)
88(3.46)
222(8.74)
352(13.85)(MAX) 60(2.36)
351(13.81)(SA-G01)
387(15.23)(SS-G01)
A
B
SAEJ518b-1
1/4
SAEJ518b-1
q1 flow rate adjusting screw
Drain port
q2 flow rate adjusting screw
Differential pressure adjusting screw
(adjustment forbidden)
P2 pressure
adjusting screw
Lubrication port
P1 pressure adjusting
screw
Discharge port
Suction port
A
B
in
3
/rev
0 3
0 2
3
12D
20D
2.1
2.8
Pressure
Range
Design
No.
22
( )
24.9
00
–
0.5
0.980
0.960
22
( )
27.85
00
–
0.25
1.096
1.086
φ
22
( )
25.385
00
–
0.025
0.999
0.998
22
( )
22.23
00
–
0.021
0.875
0.843
φ
Key width
4.76
( )
6.3
+0.015
–0.010
0.248
0.247
22
( )
26.2
±0.2
0.874
0.854
22
( )
52.4
±0.2
2.070
2.055
φ
82.6
( )
101.6
0
–0.051
4.000
3.997
28
(1.10)
φ
Pressure adjustment range
0: 2- 3.5MPa {286-500psi}
1: 2- 7MPa {286-1000psi}
2: 3-14MPa {429-2000psi}
3: 3-21MPa {429-3000psi}
RQ : 2-pressure, 2-flow rate control w/
solenoid cutoff
A
S
Max. pump capacity (cm
3
/rev)
Nominal 16, 22, 35, 45 (in
3
/rev 1.0, 1.3, 2.1, 2.8)
Pump size 1, 2
1: AC110-115V
2: AC220-230V
3: DC12V
4: DC24V
Solenoid power supply
A: SA-G01
S: SS-G01
Solenoid specifications
E1321SRQ16B1–– –
Explanation of model No.:
PVS
Installation Dimension Drawing
SOL "ON"
SOL
"OFF"
Discharge pressure P MPa
Pump capacity q
cm
3
/rev
P-Q Characteristics
01P_Piston(P15-20)_E.q 07.6.7 4:14 PM Page 16
P-17
Foot Mounting Kit
Flange kit
For PVS-1B, 2B
SAE 2 BOLT MOUNTING
01P_Piston(P15-20)_E.q 07.6.7 4:14 PM Page 17
P-18
To improve reliability, design Nos. 17 and 31 were adopted due to remodeling of the grease injection system
connecting section.
Uni-pump Specifications
Explanation of model No.
Motor selection curves
¡How to select the motor
The lower side of the output curves for each of the motors shown above indicates the operating range under rated output
for that motor.
UPV-0A
{204}
20
{184}
18
{163}
16
{143}
14
{122}{102}{81.6}
12
4
6
16
8
10 21
2460
2
{214}
( /min)
{20.4}{40.8}{61.2}
8
10
12
14
0.75kW
1.5kW
2.2kW
3.7kW
Discharge volume Q
Discharge pressure P MPa {kgf/cm
2
}
10
40
20
30
0.75kW
1.5kW
2.2kW
3.7kW
5.5kW
UPV-1A
{204}
20
{184}
18
{163}
16
{143}
14
{122}{102}{81.6}
12
8
10 21
2460
{214}{20.4}{40.8}{61.2}
( /min)
Discharge volume Q
Discharge pressure P MPa {kgf/cm
2
}
20
80
40
60
3.7kW
5.5kW
7.5kW
UPV-2A
{204}
20
{184}
18
{163}
16
{143}
14
{122}{102}{81.6}
12
8
10 21
2460
{214}{20.4}{40.8}{61.2}
( /min)
Discharge volume Q
Discharge pressure P MPa {kgf/cm
2
}
M: 230VAC
C: 230/460VAC
Pressure adjustment range
0: 2- 3.5MPa {20.4- 35.7kgf/cm
2
}
1: 2- 7MPa {20.4- 71.4kgf/cm
2
}
2: 3-14MPa {30.6-143kgf/cm
2
}
3: 3-21MPa {30.6-214kgf/cm
2
} (Note) Not available at 45 cm
3
/rev
Variable control mechanism
N: pressure compensation type
Max. pump capacity (cm
3
/rev)
Nominal 8, 16, 22, 35, 45
Motor mounting method
Mounting foot type
Pump size 0: PVS-0B, 1: PVS-1B, 2: PVS-2B
PVS series uni-pump
Number of motor poles 4: 4 poles
0.7: 0.75kW 3.7: 3.7kW
1.5: 1.5 kW 5.5: 5.5kW
2.2: 2.2 kW 7.5: 7.5kW
Motor output
Motor terminal None: Right side viewed from shaft end
A: Left side viewed from shaft end
Note) UPV-
UPV-2A
is 0.75-5.5kW
is 3.7-7.5kW
0A
1A
41 1.5N16A1–– –– – 17(31)–UPV
Design No. 17: PVS-1B 0.75-5.5kW
PVS-2B 3.7 -7.5kW
31: PVS-0B 0.75-3.7kW
Auxiliary symbol None: Side port type
Z: Axial port type (PVS-1B, 2B)
01P_Piston(P15-20)_E.q 07.6.7 4:14 PM Page 18
P-19
UPV-0A-8**-**-4-31
(side port type)
UPV-1A-
16
**-**-4-17
22
(side port type)
UPV-2A-
35
**-**-4-17
45
(side port type)
1. A class E totally enclosed fan-cooled type is used as the reference motor.
2. 200 V/220 V, 60 Hz and 200 V, 50 Hz are used as the reference motor voltages.
3. Viewed from the pump side, the suction port on the left side and the discharge port on the right side are used as the
reference port locations.
4. Broken lines indicate instances for the A terminal. Broken lines pass through to the other side of the pump along its
center.
Note: A terminal measurements are in parentheses ( ).
(Round drain hole)
View R (4 locations)
R
Lubrication port
B terminal
A terminal
Discharge port
G1/2
Suction port
G3/4
Drain port
Rc 3/8
A terminal
B terminal
Fan cover
110(4.33)
77(3.03)
M
EE
G
C
H
KD
KL KL
D
J
11(0.43)
164.5(6.48)(MAX)
18(0.71)
50(1.97)
L
IL A
OO
FF
N
T
S
149.5(5.89)
φ
Flow rate
adjusting screw
Pressure adjusting screw
(suction port, discharge
port position)127.5(5.02)
Suction port shape
R
View R (4 locations)
4-M10X16(0.63)
Lubrication
port
B terminal
Suction port
SAEJ518b-1
Discharge port
SAE518b-3/4
B terminal
4-M10X16(0.63)
Drain port
Rc 3/8
Pump model
No. nameplate
A terminal
D
I
82(3.23)
124(4.88)
EE
M
J
C
H
G
KL KL
F
77(3.03)
IL
187(7.36)(MAX)
55(2.17)
OO
L
N
181(7.13)
F
22±0.2
T
S
A
KD
φ
24(Dia 0.95)
φ
Flow rate
adjusting screw
Pressure adjusting screw
A terminal
(suction port, discharge
port position)158(6.22)
( )
0.87
0.86
26.2±0.2
( )
1.04
1.02
52.4±0.2
( )
2.07
2.05
47.5±0.2
( )
1.88
1.86
24(Dia 0.95)
φ
View R (4 locations)
Suction port shape
Suction port
Discharge port
SAEJ518b-1
B terminal
Flow rate
adjusting screw
Drain port
Rc 1/2
B terminal
A terminal
A terminal
Lubrication
port
69.5(2.74)
144(5.67)
F
KL
G
L
O
N
O
222(8.75)
A
J
E
104(4.09)
C
M
H
S
77(3.03)
T
F
257(10.12)(MAX)
IL
E
I
D
KL
SAEJ518b-1
1/4
(Round drain hol)
KD
φ
R
Pressure adjusting screw
4-M10X16(0.63)
4-M10X16(0.63)
28(Dia 1.10)
φ
28(Dia 1.10)
φ
(suction port, discharge
port position)192(7.56)
26.2±0.2
( )
1.04
1.02
52.4±0.2
( )
2.07
2.05
30.2±0.2
( )
1.20
1.18
58.7±0.2
( )
2.32
2.30
Installation Dimension Drawings
01P_Piston(P15-20)_E.q 07.6.7 4:14 PM Page 19
P-20
Motor Specifications
Output
kW
(HP)
Motor Dimensions
Frame
No.
Weight
kg
A IL C D E F G H I J L M N
S
×
T
KD KL O
0.75
(1.0)
4.88 4.23
80
( )
3.15
3.13
6.30 2.46 1.97 0.39 6.30
−
1.34 9.11 6.10 5.31
0.39
×
0.98
0.39
×
0.63
0.47
×
0.98
0.47
×
0.98
0.47
×
0.98
0.47
×
0.98
φ
0.87
φ
0.87
φ
0.87
φ
0.87
φ
1.34
φ
1.34
4.96 0.83 80M 12
1.5
(2.0)
5.61 4.67 7.01 2.76 2.46 0.39 7.05
−
1.38 10.28 6.69 6.10 5.35 5.35 90L 16
2.2
(3.0)
6.32 5.35 7.68 3.14 2.76 0.51 7.78
−
1.77 11.67 7.68 6.89 5.91 1.79 100L 20
3.7
(5.0)
6.73 5.65 8.62 3.74 2.76 0.55 8.72
−
1.77 12.38 8.82 6.89 6.34 2.09 112M 29
5.5
(7.5)
8.54 6.44 10.87 4.25 2.76 0.63 10.63 12.26 1.97 14.98 9.84 6.89 8.54 1.32 132S 48
7.5
(10.2)
8.54 6.44 10.87 4.25 2.76 0.63 10.63 12.26 1.97 14.98 9.84 6.89 8.54 1.32 132S 54
*Unit = inch
90
( )
3.54
3.52
100
( )
3.94
3.92
112
( )
4.41
4.89
132
( )
5.20
5.18
132
( )
5.20
5.18
01P_Piston(P15-20)_E.q 07.6.7 4:14 PM Page 20
P-21
PZS SERIES
VARIABLE VOLUME PISTON PUMP
*
*
*
M
0
Discharge
port
Suction
port
Drain
port
PZS Series
Variable Volume Piston Pump
4.27 to 13.47in
3
/rev
4.27 to 6.10in
3
/rev 4085psi
7.93 to 13.42in
3
/rev 3642psi
¡Handling
¡ Pump Installation and Piping
Precautions
zUse flexible couplings for connect-
ing the pump shaft to the drive
shaft, and prevent radial or thrust
load from being applied to the
pump shaft.
xEccentricity between the drive shaft
and pump shaft should be no greater
than 0.05mm, with an eccentric angle
error of 1° or less.
cKeep the clamping length of cou-
plings and pump shafts at least 2/3
the length of the coupling width.
vUse a sufficiently rigid pump mount-
ing base.
bSet pump suction side pressure to
-0.03 MPa or more (suction port
flow velocity less than 2 m/sec).
nRaise part of the drain piping so it is
above the topmost part of the pump
body, and insert the return section of
the drain piping into the hydraulic
operating fluid. Also, observe the
values in the following table in order
to limit the drain back pressure to
0.1 MPa.
mMount the pump so the pump shaft
is oriented horizontally.
,Use of rubber hose is recommend-
ed in order to minimize noise and
vibration.
¡Management of Hydraulic Operating
Fluid
zUse only good-quality hydraulic
operating fluid with a kinematic vis-
cosity during operation within the
range of 20 to 200 mm
2
/sec.
Normally, you should use an R&O
type and wear-resistant type of IS-
OGV32 to 68 or equivalent. The
optimum kinematic viscosity during
operation is 20 to 50 mm
2
/sec.
xThe operating temperature range is
5 to 60°C. When the oil tempera-
ture at startup is 5°C or less, run
the pump at low pressure and low
speed until the oil temperature
reaches 5°C.
cProvide a suction strainer with a fil-
tering grade of about 100
μ
(150
mesh).
(Continued on following page)
Features
qq
High pressure and high efficiency.
These pumps are available in high
pressure ranges (up to 28 MPa) with
a high operational efficiency.
ww
Low noise and low pulsation.
These pumps have been developed
for low noise and low pulsation opera-
tion using the semi-cylindrical swash
plate and an increased number of pis-
tons (from 9 to 11 units).
ee
High reliability and long ser-
vice life.
Optimum pressure balance provided
by the spherical valve plate and the
use of copper alloy bushings on the
piston sliding surface of the cylinder
barrel ensure stable operation for a
wider operational range.
rr
Applicable for multiple-pump
layout.
In addition to a single pump layout,
PZS Series pumps are applicable for
double-pump layout for combination
with an IP pomp (constant discharge
pump) for wider range of applications.
Additionally, an adapter kit is avail-
able to make a double pump with
other pumps (ex. PVS-1B, VDC-1B).
Note 1. Fixed discharge pump can be configured by combining with an IP pump.
2. Pump capacity adjustment ranges are for control codes N, RS, and WS. For information about control code NQ, see page P-26.
3. The standard direction of rotation is clockwise when viewed from the shaft end. Contact your agent for information about counterclockwise rotation.
4. A keyed straight shaft is standard. Contact your agent for information about spline shafts.
Specifications
Model No.
Item
3B, 4B, 5B 6B
Pipe joint
size
At least 3/4" At least 1"
Pipe I.D.
At least
φ
17 At least
φ
22
Pipe length 1 m or less 1 m or less
Model No.
Pump
Capacity
in
3
/rev
(Adjustment
Range)
Rated
Pressure
MPa
{psi}
Maximum
Working
Pressure MPa
{psi}
Pressure Adjustment
Range MPa
{psi}
Revolution Speed min
−
1
Weight
kg
Fixed Discharge Pump (Note 1)
Min. Max.
Capacity
in
3
/rev
Pressure
MPa
{psi}
PZS-3B-*- 70* 1-E4481A
3-E4481A
4-E10
4.27
(2.74 to 4.27)
21
{3000
}
28
{4085
}
2to27 {291 to 1000}
2 to 21 {291 to 3000}
2 to 28 {291 to 4085}
500 1800
37
0.22 to 0.50
21
{3000}
PZS-4B-*-100* 1-E4481A
3-E4481A
4-E10
6.10
(2.44 to 6.10)
21
{3000
}
28
{4085
}
2to27 {291 to 1000}
2 to 21 {291 to 3000}
2 to 28 {291 to 4085}
500 1800
58
0.22 to 0.96
21
{3000}
PZS-5B-*-130* 1-E10
3
4
7.93
(3.11 to 7.93)
21
{3000
}
25
{3642
}
2to27 {291 to 1000}
2 to 21 {291 to 3000}
2 to 25 {291 to 3642}
500 1800
86
0.22 to 1.97
21
{3000}
PZS-6B-*-180* 1-E10
3
4
10.98
(6.16 to 10.98)
21
{3000
}
25
{3642
}
2to27 {291 to 1000}
2 to 21 {291 to 3000}
2 to 25 {291 to 3642}
500 1800
123
0.22 to 3.90
21
{3000}
PZS-6B-*-220* 1-E10
3
4
13.42
(7.56 to 13.42)
21
{3000
}
25
{3642
}
2to27 {291 to 1000}
2 to 21 {291 to 3000}
2 to 25 {291 to 3642}
500 1500
126
0.22 to 3.90
21
{3000}
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 21
P-22
vManage hydraulic operating fluid so
contamination is maintained at
class NAS10 or lower.
bUse hydraulic operating fluid when
the operating ambient temperature is
in the range of 0 to 60°C.
¡Startup Precautions
zBefore starting up the pump, fill the
pump body with clean hydraulic
operating fluid through the lubrica-
tion port.
xAn unload circuit is required when
the motor is started under
condition O−3. Contact your agent
about the unload circuit.
cCheck to make sure that the rotation
direction of the pump is the same as
the rotation direction indicated by the
arrow on the pump body.
vAir entering the pump or pipes can
cause noise or vibration. At startup,
set the pump discharge side to a
no-load state, and operate the
pump in the inching mode to
remove any air that might be in the
pump or pipes.
bEquip an air bleed valve in circuits
where it is difficult to release air
before startup.
¡Configuring Pressure and Discharge
Rate Settings
The factory default pump discharge
rate setting is the setting's maxi-
mum value, while the default dis-
charge pressure is the settings min-
imum value. Change the discharge
rate and discharge pressure set-
tings in accordance with your par-
ticular operating conditions.
[
Pressure Adjustment
]
Rotating the pres-
sure adjusting
screw clockwise
increases pres-
sure.
[
Discharge Volume
Adjustment
]
Rotating the flow
rate adjusting
screw clockwise
decreases the dis-
charge rate.
Note: Securely tighten the lock nut after making
adjustments.
Model No. Oil Amount cm
3
PZS-3B 1000
PZS-4B 1800
PZS-5B 2200
PZS-6B 3000
Understanding Model Numbers
Standard type
Pressure compensation(N)
Option type
2-Pressure, 2-Flow Rate Control Type (NQ)
Pressure adjustment range
1: 2 to 7MPa
{291 to 1000psi}
3: 2 to 21MPa
{291 to 3000psi}
4: 2 to 28MPa
{291 to 4085psi}
Note: PZS-5B/6B maximum operating pressure: 25MPa (3642psi)
Design number
E4481A for N1 or N3 PZS 3/4B
E10 for others
Variable Control Mechanisms
N: Pressure compensation control
Pump capacity (in
3
/rev)
4.27, 6.10, 7.93, 10.98, 13.42
Mounting method B: Flange type mounting A: Foot type mounting
Pump size 3, 4, 5, 6
PZS – – –4 B 100 E10N
Pressure adjustment range
1: 2 to 7MPa
{291 to 1000psi}
3: 2 to 21MPa
{291 to 3000psi}
4: 2 to 28MPa
{291 to 4085psi}
Note: PZS-5B maximum operating pressure: 25MPa (3642psi)
Design number
Variable Control Mechanisms
NQ: 2-pressure, 2-flow rate control
Pump capacity (in
3
/rev)
4.27, 6.10, 7.93
Mounting method B: Flange type mounting A: Foot type mounting
Pump size 3, 4, 5
PZS 4 B 100 N Q E10–– –
Pump capacity
cm
3
/ rev
Discharge pressure MPa
P-Q characteristics
PH
PL
q
L
q
H
P-Q characteristics
Pump capacity
cm
3
/ rev
Discharge pressure MPa
*
*
*
M
0
Discharge
port
Suction port Drain port
Rotate left
Rotate
right
Pressure
Pressure adjustment range
Discharge
rate
Pressure
Discharge rate adjustment range
Discharge rate
Rotate left
Rotate right
*
*
*
M
0
Discharge
port
Suction
port
Drain
port
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 22
P-23
Installation Dimension Drawings
Pressure Compensation Type
Installing a remote control relieve valve to the
pilot port provides remote control of pressure
compensation.
PZS-3B-70N*-E10, E4481A
Solenoid Cutoff Control Type (RS)
2-Pressure Control System (WS)
Pressure adjustment range
1: 2 to 7MPa
{291 to 1000psi}
3: 2 to 21MPa
{291 to 3000psi}
4: 2 to 28MPa
{291 to 4085psi}
Note: PZS-5B/6B maximum operating pressure: 25MPa (3642psi)
Design number
Solenoid power supply
1: AC100V
2: AC200V
3: DC12V
4: DC24V
Variable Control Mechanisms
RS: Solenoid cutoff control
Pump capacity (in
3
/rev)
4.27, 6.10, 7.93, 10.98, 13.42
Mounting method B: Flange type mounting A: Foot type mounting
Pump size 3, 4, 5, 6
PZS 4 B–– –100 R S E10
Pressure adjustment range
1: 2 to 7MPa
{291 to 1000psi}
3: 2 to 21MPa
{291 to 3000psi}
4: 2 to 28MPa
{291 to 4085psi}
Note: PZS-5B/6B maximum operating pressure: 25MPa (3642psi)
Variable Control Mechanisms
WS: 2-pressure control type
Pump capacity (in
3
/rev)
4.27, 6.10, 7.93, 10.98, 13.42
Design number
Solenoid power supply
1: AC100V
2: AC200V
3: DC12V
4: DC24V
Mounting method B: Flange type mounting A: Foot type mounting
Pump size 3, 4, 5, 6
PZS 4 B 100 W E10S–– –
SOL"ON"
SOL"OFF"
P-Q characteristics
Pump capacity
cm
3
/ rev
Discharge pressure MPa
*
*
*
M
0
Discharge
port
Suction port Drain port
SOL"ON"
SOL"OFF"
P-Q characteristics
Pump capacity
cm
3
/ rev
PH
PL
Discharge pressure MPa
*
*
*
M
0
Discharge
port
Suction port Drain port
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 23
P-24
PZS-4B-100N*-E10, E4481A
PZS-5B-130N*-E10
PZS-6B-180N*-E10
PZS-6B-220N*-E10
Flow Adjustment Rotation Angle (r) and Pump Capacity (q)
Use a flow adjustment length that is within the range noted in the above
chart. Using a length that is outside the lower limit adjustment range can
lead to oil leaks.
Use a flow adjustment length that is within the range noted in the above
chart. Using a length that is outside the lower limit adjustment range can
lead to oil leaks.
105
140
120
130
100
80
20
70
60
51
40
42
45
252015
Flow rate adjustment length mm
PZS-5B-130
PZS-4B-100
PZS-3B-70
Pump capacity q
cm
3
/rev
105
225
220
200
175
180
150
75
125
124
100
101
252015
Flow rate adjustment length mm
PZS-6B-220
PZS-6B-180
Pump capacity q
cm
3
/rev
Flow rate adjustment
length: R
End plug
Lock nut
Flow rate
adjusting screw
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 24
P-25
2-Pressure, 2-Flow Rate Control Type
PZS-3B-70N*Q*-10
PZS-4B-100N*Q*-10
PZS-5B-130N*Q*-10
Pump Volume Adjustable Range
Pump Model No.
Volume Adjustment Range cm
3
/rev
Factory Default
qL Setting (cm
3
/rev)
q
H Note 1
q
L Note 2
PZS-3B-70N*Q*-10 5 to 70 5 to 40 14
PZS-4B-100N*Q*-10 16 to 100 7 to 60 20
PZS-5B-130N*Q*-10 17 to 130 8 to 70 26
Note1: The setting range for pump maximum capacity qH depends on the qL setting.
Note2: Overall efficiency at a low flow rate is worse than at the maximum flow rate. Keep this in
mind when deciding on the drive motor capacity.
Drain port (3/4SAE)
P
H pressure
adjusting screw
q
H flow rate
adjusting screw
M10x16
Discharge
port
SAEJ518b-1
1/2
Suction
port
SAEJ518b-1
1/4
PL pressure
adjusting screw
q
L flow rate
adjusting screw
8(0.31)
85(3.35)
58.7(2.31)
30.2
(1.19)
223(8.78)
128(5.04)
164(6.46)
128(5.04)
85(3.35)
136(5.35)
18(0.71)
5(0.20)
48(1.89)
34
(1.34)
411(16.18)(MAX)
127.5(5.02)
172(6.77)
279(10.98)
17(0.67)
177(6.97)
30
(1.18)
φ
PCD 181(7.13)
φ
Lubrication port
Key width
7.94
( )
0
–0.05
0.31
0.31
35.33
( )
–0.03
–0.25
1.39
1.38
φ
31.75
( )
–0.036
–0.051
1.25
1.24
φ
127
( )
–0.036
–0.051
5.00
4.99
M12x20
Drain port (3/4SAE)
P
H pressure adjusting screw
q
H flow rate
adjusting screw
Discharge port
SAEJ518b-2
Suction port
SAEJ518b-2
P
L pressure adjusting screw
q
L flow rate
adjusting screw
452(17.80)(MAX)
197(7.76)
129(5.08)
100(3.95)
90(3.54)
320(12.60)
257(10.12)
8(0.04)
55(2.17)
10(0.39)
77.8(3.06)
153(6.02)
161.6(6.36)
200(7.87)
161.6(6.36)
21(0.83)
81(3.19)
91(3.58)
228.5(9.00)
φ
33
(1.30)
φ
Lubrication port
φ
152.4
( )
–0.036
–0.051
6.00
5.99
42.2
( )
–0.03
–0.15
1.66
1.65
φ
38.1
( )
–0.036
–0.030
1.50
1.49
Key width
9.53
( )
0
–0.015
0.38
0.37
42.9
(1.69)
M12x20
Drain port (3/4SAE)
P
H pressure adjusting screw
q
H flow rate
adjusting screw
Discharge port
Suction port
P
L pressure adjusting screw
q
L flow rate
adjusting screw
6(0.24)
67(2.64)
25(0.98)
10(0.39)
100(3.93)
268(10.55)
35(1.38)
88.9(3.50)
466(18.35)(MAX)
110(4.33)
224.6(8.84)
265(10.43)
224.6(8.84)
265(10.43)
155(6.10)
110(4.33)
215(8.46)
141(5.55)
SAEJ518b-2
1/2
SAEJ518b-2
1/2
22
(0.87)
φ
38
(1.50)
φ
Lubrication port
φ
165.1
( )
–0.036
–0.040
6.50
6.50
49.428
( )
–0.03
–0.25
1.95
1.94
φ
44.45
( )
–0.0
–0.05
1.75
1.75
Key width
11.113
( )
0
–0.015
0.44
0.44
50.8
(2.00)
Discharge pressure MPa
P
L
q
H
q
L
PH
P-Q characteristics
cm
3
/rev
Pump capacity q
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 25
P-26
40
(1.57)
44
(1.73)
48
(1.89)
52
(2.05)
36
(1.42)
40
50
60
70
80
90
100
Adjustment length: L2 mm(inch)
20 22
(0.87)
24 26
(1.02)
28 30
(1.18)
32 34
(1.34)
16 18
(0.73)
14
(0.55)
0
20
10
30
40
50
60
70
80
Adjustment length: L1 mm(inch)
90
100
110
120
130
140
32
(1.26)
Pump maximum capacity
adjustment length
Pump small capacity
adjustment length
PZS-5B
PZS-4B
PZS-3B
PZS-5B
PZS-4B
PZS-3B
qL (small capacity)
adjusting screw
q
H (maximum capacity)
adjusting screw
L1
L2
Pump capacity q
L
(cm
3
/rev)
Pump capacity q
L
(cm
3
/rev)
PZS Pump 2-Pressure 2-Flow Rate Control Flow Rate Adjustment Graph
•
Be sure to adjust the low flow rate first, and then adjust the maximum flow rate.
•
Remember that the maximum flow rate adjustment range (lower limit) changes in accordance with the low flow rate
adjustment. The maximum flow rate adjustment lower limit is equivalent to the low flow rate adjustment length (L1) plus
11mm.
•
Pump efficiency at a low flow rate is worse than at the maximum flow rate. Keep this in mind when deciding on the drive
motor capacity.
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 26
P-27
2-Pressure Control Type
PZS-3B-70W*S
PZS-4B-100W*S*-10
PZS-5B-130W*S*-10
PZS-6B-180W*S*-10
PZS-6B-220W*S*-10
Drain port (3/4SAE)
Flow rate
adjusting screw
M10x16
Discharge port
SAEJ518b-1
1/2
Suction port
P
L pressure
adjusting screw
P
H pressure
adjusting screw
242(9.53)
8(0.32)
85(3.35)
261(10.28)
58.7(2.31)
30.2(1.19)
223(8.78)
296(11.65)(MAX)
128(5.04)
164(6.46)
128(5.04)
85(3.35)
136(5.35)
18(0.71)
306(12.05)(MAX)
5(0.20)
48(1.89)
34
(1.34)
PCD 181(7.13)
145(5.71)
102.5(4.04)
128(5.04)
57(2.24)
30(1.18)
17(0.67)
SAEJ518b-1
1/4
φ
φ
Lubrication
port
172(6.77)
Key width
7.94
( )
0
–0.05
0.31
0.31
35.33
( )
–0.03
–0.25
1.39
1.38
φ
31.75
( )
–0.036
–0.051
1.25
1.25
φ
127
( )
–0.036
–0.051
5.00
5.00
Drain port (3/4SAE)
Flow rate
adjusting screw
Discharge port
SAEJ518b-2
Suction port
SAEJ518b-2
M12x20
P
H pressure adjusting screw
P
L pressure adjusting screw
33(1.30)
262(10.31)
129(5.08)
161.6(6.36)
200(7.87)
8(0.31)
90(3.54)
153(6.02)
100(3.94)
161.6(6.36)
257(10.12)
10(0.39)
55(2.17)
347(13.66)(MAX)
77.8(3.06)
42.9
(1.69)
91(3.58)
228.5(9.00)
81(3.19)
25(0.98)
21(0.83)
φ
φ
Lubrication
port
Key width
9.53
( )
0
–0.015
0.38
0.37
42.2
( )
–0.03
–0.15
1.66
1.66
φ
38.1
( )
–0.036
–0.030
1.50
1.50
φ
152.4
( )
–0.06
–0.05
6.00
6.00
Flow rate
adjusting screw
Drain port (3/4SAE)
Discharge port
Suction port
SAEJ518b-2
1/2
SAEJ518b-2
1/2
M12x20
P
H pressure
adjusting screw
P
L pressure
adjusting screw
32.5
(1.28)
6(0.24)
67(2.64)
25(0.98)
10(0.39)
100(3.94)
268(10.55)
316(12.44)
35(1.38)
50.8(2.00)
88.9(3.50)
362(14.25)(MAX)
272(10.71)
133(5.24)
141(5.55)
70(2.76)
110(4.33)
224.6(8.84)
265(10.43)
224.6(8.84)
265(10.43)
155(6.10)
110(4.33)
22(0.87)
Lubrication
port
φ
Key width
11.113
( )
0
–0.051
0.44
0.44
49.428
( )
–0.03
–0.25
1.95
1.94
φ
44.45
( )
–0.036
–0.051
1.75
1.75
φ
165.1
( )
–0.06
–0.040
6.50
6.50
Discharge port
Suction port
Drain port (3/4SAE)
Flow rate
adjusting screw
M12x20
P
L pressure
adjusting screw
P
H pressure
adjusting screw
147(5.79)
156.5(6.16)
265(10.43)
194(7.64)
76(2.99)
245(9.65)
88(3.46)
12(0.47)
53.5(2.11)
5(0.20)
60(2.36)
74(2.91)
333(13.11)
410.5(16.16)
50.8(2.00)
88.9(3.50)
25(0.98)
131(5.16)
131(5.16)
265(10.43)
99(3.90)
224.6(8.84)
224.6(8.84)
22(0.87)
296(11.65)
52(2.05)
φ
SAEJ518b-3
SAEJ518b-2
1/2
φ
Lubrication
port
Key width
14
( )
0
–0.018
0.55
0.55
φ
50
( )
+0.021
+0.008
1.97
1.97
φ
165.1
( )
–0.06
–0.040
6.50
6.50
❚
Using the installed solenoid valve so it is continuously conducting current can cause the coil surface to become hot.
Do not touch the surface of the coil directly with your hands.
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 27
P-28
Solenoid Cutoff Control Type
PZS-3B-70R*S*-10
PZS-4B-100R*S*-10
PZS-6B-180R*S*-10
PZS-6B-220R*S*-10
❚
Using the installed solenoid valve so it is continuously conducting current can cause the coil surface to become hot.
Do not touch the surface of the coil directly with your hands.
Drain port (3/4SAE)
Pressure adjusting
screw
Flow rate
adjusting screw
M10x16
Discharge port
SAEJ518b-1
1/2
Suction port
8(0.32)
85(3.35)
261(10.28)
58.7(2.31)
30.2(1.19)
223(8.78)
296(11.65)(MAX)
128(5.04)
164(6.46)
172(6.77)
128(5.04)
85(3.35)
136(5.35)
18(0.71)
306(12.05)(MAX)
5(0.20)
48(1.89)
34
(1.34)
145(5.71)
202(7.95)
102.5(4.04)
128(5.04)
57(2.24)
17(0.67)
SAEJ518b-1
1/4
PCD 181(7.13)
φ
30
(1.18)
φ
Lubrication
port
Key width
7.94
( )
0
–0.05
0.31
0.31
φ
31.75
( )
–0.036
–0.051
1.25
1.25
φ
127
( )
–0.06
–0.051
5.00
5.00
35.33
( )
–0.03
–0.25
1.39
1.38
Drain port (3/4SAE)
Pressure adjusting screw
Flow rate
adjusting screw
Discharge port
Suction port
M12x20
222(8.74)
129(5.08)
161.6(6.36)
200(7.87)
8(0.31)
90(3.54)
153(6.02)100(3.94)
161.6(6.36)
257(10.12)
10(0.39)
55(2.17)
77.8(3.06)
42.9
(1.69)
91(3.58)
81(3.19)
25(0.98)
195(7.68)
21(0.83)
Lubrication
port
347(13.66)(MAX)
SAEJ518b-2
SAEJ518b-2
33
(1.30)
φ
228.5(9.00)
φ
Key width
9.53
( )
0
–0.015
0.38
0.37
42.2
( )
–0.03
–0.15
1.66
1.66
φ
38.1
( )
–0.036
–0.030
1.50
1.50
φ
152.4
( )
–0.06
–0.05
6.00
6.00
Flow rate
adjusting screw
Pressure adjusting screw
Drain port (3/4SAE)
Discharge port
Suction port
M12x20
133(5.24)
232(9.13)
141(5.55)
70(2.76)
32.5
(1.28)
6(0.24)
67(2.64)
25(0.98)
10(0.39)
100(3.94)
268(10.55)
316(12.44)
35(1.38)
50.8(2.00)
88.9(3.50)
362(14.25)(MAX)
110(4.33)
224.6(8.84)
265(10.43)
224.6(8.84)
265(10.43)
155(6.10)
110(4.33)
SAEJ518b-2
1/2
SAEJ518b-2
1/2
38(1.50)
φ
Lubrication
port
22(0.87)
φ
Key width
11.113
( )
0
–0.051
0.44
0.44
49.428
( )
–0.03
–0.25
1.95
1.94
φ
44.45
( )
–0.036
–0.051
1.75
1.75
φ
165.1
( )
–0.06
–0.040
6.50
6.50
Discharge port
Suction port
Drain port (1"SAE)
Pressure adjusting screw
Flow rate
adjusting screw
M12x20
147(5.79)
156.5(6.16)
256(10.08)
265(10.43)
194(7.64)
76(2.99)
245(9.65)
88(3.46)
12(0.47)
5(0.20)
60(2.36)
74(2.91)
333(13.11)
410.5(16.16)
50.8(2.00)
88.9(3.50)
25(0.98)
131(5.16)
131(5.16)
265(10.43)
99(3.90)
224.6(8.84)
224.6(8.84)
SAEJ518b-3
SAEJ518b-2
1/2
Lubrication
port
22(0.87)
φ
53.5(2.11)
52(2.05)
φ
Key width
14
( )
0
–0.018
0.55
0.55
φ
50
( )
+0.021
+0.008
1.97
1.97
φ
165.1
( )
–0.06
–0.040
6.50
6.50
PZS-5B-130R*S*-10
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 28
P-29
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
20
30
10
0
40
50
60
100
110
120
130
50
60
70
80
90
100
1800min
–1
1500min
–1
Overall efficiency η
Volume efficiency ηv
1500min
–1
1800min
–
1
General Performance
Lin
Lin
Q
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
2
0
8
6
4
1800min
–1
1500min
–1
Axial Input at Full Cutoff
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
60
80
70
1800min
–1
1500min
–1
Noise Characteristics
DR
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
20
0
40
60
0
5
10
100
120
140
1800min
–1
1500min
–1
1500min
–1
1800min
–1
Pressure - Flow Rate
Characteristics
Q
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
Q=126
r/min
Q=100
r/min
Q=80
r/min
Q=60
r/min
30
40
20
10
50
60
Axial input
Efficiency
η
,
η
v%
Axial input at full cutoff
kW
Discharge rate
Q
r
/min
Discharge rate
Q
r
/min
Input
Lin kW
Input
Lin kW
Axial input kW
Drain rate
DR
r
/min
Noise Level dB(A)
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
20
0
40
60
80
140
160
180
50
60
70
80
90
100
1800min
–1
1500min
–1
Overall efficiency η
Volume efficiency ηv
1500min
–1
1800min
–1
General Performance
Lin
Lin
Q
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
2
0
8
6
4
1800min
–1
1500min
–1
Axial input at full cutoff
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
60
80
70
1800min
–1
1500min
–1
Noise Characteristics
DR
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
20
0
40
60
80
0
5
10
100
140
180
1800min
–1
1500min
–1
1500min
–1
1800min
–1
Pressure - Flow Rate
Characteristics
Q
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 28
{70.4} {143} {214} {286}
Q=60
r/min
Q=100
r/min
Q=180
r/min
Q=140
r/min
60
80
40
20
100
Axial input
Efficiency
η
,
η
v%
Discharge rate
Q
r
/min
Discharge rate
Q
r
/min
Input
Lin kW
Input
Lin kW
Drain rate
DR
r
/min
Noise Level dB(A)
Axial input kW
Axial input at full cutoff
kW
Performance Curves
Typical Characteristics at a Hydraulic Operating Fluid Kinematic Viscosity of 46 mm
2
/s
PZS-3B-70N*-10
Typical Characteristics at a Hydraulic Operating Fluid Kinematic Viscosity of 46 mm
2
/sPZS-4B-100N*-10
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 29
P-30
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
40
60
20
0
80
100
120
180
200
220
240
50
60
70
80
90
100
1800min
–1
1500min
–1
Overall efficiency η
Volume efficiency ηv
1500min
–1
1800min
–1
General Performance
Lin
Q
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
60
80
70
1800min
–1
1500min
–1
Noise Characteristics
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
Q=234
r/min
Q=200
r/min
Q=150
r/min
Q=100
r/min
60
80
40
20
100
120
Axial input
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{71} {143} {214} {255}
40
0
80
120
0
5
10
160
200
240
1800min
–1
1500min
–1
1500min
–
1
1800min
–1
Pressure – Flow Rate
Characteristics
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{71} {143} {214} {255}
2
0
12
14
10
8
6
4
Axial input at full cutoff
1800min
–1
1500min
–1
Efficiency
η
,
η
v%
Discharge rate
Q
r
/min
Discharge rate
Q
r
/min
Drain rate
DR
r
/min
Input
Lin kW
Input
Lin kW
Axial input kW
Axial input at full cutoff
kW
Noise Level dB(A)
Typical Characteristics at a Hydraulic Operating Fluid Kinematic Viscosity of 46 mm
2
/sPZS-5B-130N*-10
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
40
60
20
0
80
100
120
140
240
270
330
300
50
60
70
80
90
100
1800min
–1
1500min
–1
Overall efficiency η
Volume efficiency ηv
1500min
–1
1800min
–1
General Performance
Lin
Q
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
2
0
12
14
16
10
8
6
4
1800min
–1
1500min
–1
Axial input at full cutoff
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214}{255}
60
80
70
1800min
–1
1500min
–1
Noise Characteristics
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
Q=324
r/min
Q=250
r/min
Q=200
r/min
Q=150
r/min
60
100
80
40
20
140
120
Axial input
Efficiency
η
,
η
v%
Discharge rate
Q
r
/min
Discharge rate
Q
r
/min
Drain rate
DR
r
/min
Input
Lin kW
Input
Lin kW
Axial input kW
Axial input at full cutoff
kW
Noise Level dB(A)
Lin
DR
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{71} {143} {214} {255}
40
0
80
120
160
0
5
10
210
270
330
1500min
–
1
Pressure – Flow Rate
Characteristics
Q
1800min
–1
1800min
–1
1500min
–1
Typical Characteristics at a Hydraulic Operating Fluid Kinematic Viscosity of 46 mm
2
/sPZS-6B-180N*-10
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 30
P-31
Typical Characteristics at a Hydraulic Operating Fluid Kinematic Viscosity of 46 mm
2
/sPZS-6B-220N*-10
Cross-sectional Drawing
PZS-3B-70N*-E4481, E10
PZS-4B-100N*-E4481, E10
PZS-6B-**N*-E10
List of Sealing Parts
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
Body
Case
Shaft
Cylinder barrel
Valve plate
Piston
Shoe
Shoe holder
Barrel holder
Swash plate
Thrust bush
Seal holder
Thrust plate
Spring C
Spring S
Control piston
End plug
Guide screw
Spring holder
Retainer
Needle
Key
Plug
Pin
Orifice
Nut
Ball bearing
Part No.
Part Name
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
Needle bearing
Oil seal
Snap ring
Snap ring
Snap ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
Backup ring
Orifice
Flat philips head screw
Plug
Pin
Bolt
Plug
O-ring
Plate
Washer
Bolt
Eye bolt
Part
No.
Name
Product Number
Remarks
PZS-3B Q'ty
PZS-4B
Q'ty PZS-6B Q'ty
29 Oil seal TCN-456812 1 TCN-507212 1 TCN-659013 1 NOK
33 O-ring 1B-G95 1 1B-G105 1 1B-G135 1 JIS B 2401
34 O-ring 1B-G130 1 1B-G155 1 1B-G200 1
″
35 O-ring 1B-G50 1 1B-G50 1 1B-G65 1
″
36 O-ring 1B-P34 1 1B-P36 1 1B-P41 1
″
37 O-ring 1B-P12 1 1B-P16 1 1B-P16 1
″
38 O-ring 1B-P21 2 1B-P21 3 1B-P21 3
″
39 O-ring Note 1 1 1B-P9 1 1B-P10 1
″
40 O-ring 1B-P8 5 1B-P8 5 1B-P8 8
″
41 Backup ring T2-P12 1 T2-P16 1 T2-P16 1 JIS B 2407
48 O-ring Note 1 1 1B-G85 1 1B-G85 1 JIS B 2401
Note 1: Contact your agent about this type of O-ring.
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
40
60
20
0
80
100
120
140
240
270
330
300
50
60
70
80
90
100
Overall efficiency η
Volume efficiency ηv
1500min
–1
1200min
–1
General Performance
Lin
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
2
8
10
12
14
16
6
4
1500min
–1
1200min
–1
Axial Input at Deadhead
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
60
80
70
1200min
–1
1500min
–1
Noise Characteristics
1500min
–1
1200min
–1
Discharge rate Q
Input
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{70.4} {143} {214} {255}
Q=330
r/min
Q=250
r/min
Q=200
r/min
Q=150
r/min
80
100
40
60
20
10
120
160
140
Axial input
Efficiency
η
,
η
v%
Discharge rate
Q
r
/min
Discharge rate
Q
r
/min
Drain rate
DR
r
/min
Input
Lin kW
Input
Lin kW
Axial input kW
Axial input at Deadhead kW
Noise Level dB(A)
Lin
DR
Discharge pressure P MPa{kgf/cm
2
}
0 7 14 21 25
{71.4} {143} {214} {255}
40
0
80
120
160
0
5
10
210
270
330
1500min
–1
1200min
–1
1500min
–1
1200min
–1
Pressure – Flow Rate
Characteristics
Q
Discharge rate
Drain rate
Input
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 31
P-32
PZS-5B-130N*-E10
PZS-5B
Pressure Compensator
Part No.
Part Name
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
Ball bearing
Needle bearing
Oil seal
Snap ring
Snap ring
Snap ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
Backup ring
Bolt
Flat philips head screw
Plug
Plug
Plug
Orifice
O-ring
Plate
Washer
Bolt
Plug
Eye bolt
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
10-1
10-2
10-3
10-4
10-5
11
Valve body
Spool
Spring guide
Sprint bearing
Spring
Retainer
Needle valve
Valve seat
Spring
Adjustment screw kit
Adjustment screw
Nut
O-ring
Nut
Spring pin
Retainer
Part No.
Part Name
12
13
14
15
16
17
18
19
20
21
22
Collar
Plug
Plug
Nut
Socket head screw
O-ring
O-ring
O-ring
O-ring
O-ring
Plug
Parts marked by an asterisk "*" are not available on the market. Consult your agent.
Part No.
Name Q'ty Size
Remarks
13 Gasket 1 * 3 Bond
30 Oil seal 1 TCN-608212 N. O. K
34 O-ring 1 1B-G125 JIS B 2401
35 O-ring 2 1B-P21 JIS B 2401
36 O-ring 1 1B-P16 JIS B 2401
37 O-ring 1 1B-P42 JIS B 2401
38 O-ring 1 1B-P14 JIS B 2401
39 O-ring 5 1B-P8 JIS B 2401
40 O-ring 2 1B-P7 JIS B 2401
41 Backup ring 1 T2-P16 JIS B 2407
48 O-ring 1 1B-G85 JIS B 2401
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
Body
Case
Shaft
Cylinder barrel
Valve plate
Piston
Shoe
Shoe holder
Barrel holder
Swash plate
Thrust plate
Seal holder
Gasket
Spring C
Spring S
Control piston
End plug
Guide screw
Thrust bush
Spring holder
Retainer
Needle
Key
Plug
Pin
Connector
Nut
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 32
P-33
PZM-*-10 IHM-55-10
List of Sealing Parts
Screw In Type
Welded Type
Foot Mounting Installation Measurement Chart
Piping Flange Kit
Foot Mounting
Kit Model No.
Applicable Pump
Model No.
Accessories Measurements (inch)
Bolt Q'ty
Washer
Q'ty A B C E F G H (I)
PZM-3-10 PZS-3B
TH-16×40
4 WP-16 4 11.63
13.15
6.00 0.04
−
5.50 7.99 4.11
PZM-4-10 PZS-4B
TB-20×45
4 WP-20 4 11.42
13.15
6.30 0.04
−
5.31 7.79
3.74
IHM-55-10 PZS-5B
,
6B
TH-20×50
4 WS-B-20 4 13.00
14.57
7.87 0.04 4.92 4.92
11.81
1.57
Foot Mounting
Kit Model No.
Measurements (mm)
Weight
kg
(J) K L M N P Q R (S) T
φ
D
φ
d1
φ
d2
φ
d4
PZM-3-10 2.36 0.98 5.04 5.04 0.98 M16 10.20
−
1.75 2.40 5.00 1.38 0.71 3.39 13.5
PZM-4-10 2.44 1.10 6.36 6.36 0.98 M20 10.63 8.66 1.30 2.44 6.00 1.34 0.71 6.00 18.0
IHM-55-10
2.76
(Note)
1.18 8.84 8.84
1.18 M20 13.39 10.83 0.79 3.54
6.50
1.34 0.71
5.51
32.0
Note The IHM-55-10 (J) dimension (2.76) is the value for the PZS-5B. This dimension becomes 2.28 in the case of the PZS-6B.
The IHM-55-10 (I) dimension (1.57) is the value for the PZS-5B. This dimension becomes 1.10 in the case of the PZS-6B.
Screw In Type
Flange Kit model No.
Applicable Pump
Model No.
IN Flange
Flange Part No.
Bolt
Washer O-ring
PJF-10300T PZS-3B IH03J-100120 1
TH-12×55
4 WS-B-12 4
1B-G50 1
PJF-10400T PZS-4B IH03J-100160 1
TH-12×60
4 WS-B-12 4
1B-G60 1
PJF-10500T PZS-5B IH03J-100200 1
TH-12×65
4 WS-B-12 4
1B-G75 1
PJF-10600T PZS-6B IH03J-100240 1
TH-16×75
4 WS-B-16 4
1B-G85 1
Welded Type
Flange Kit model No.
Applicable Pump
Model No.
IN Flange
Flange Part No.
Bolt
Washer O-ring
PJF-10300E PZS-3B IH03J-200120 1
TH-12×55
4 WS-B-12 4
1B-G50 1
PJF-10400E PZS-4B IH03J-200160 1
TH-12×60
4 WS-B-12 4
1B-G60 1
PJF-10500E PZS-5B IH03J-200200 1
TH-12×75
4 WS-B-12 4
1B-G75 1
PJF-10600E PZS-6B IH03J-200240 1
TH-16×75
4 WS-B-16 4
1B-G85 1
OUT Flange
Plug
Flange Part No.
Bolt
Washer O-ring
IH03J-100100 1
TH-10×55
4 WS-B-10 4
1B-G40 1 TPHA-1/4 1
IH03J-100160 1
TH-12×60
4 WS-B-12 4
1B-G60 1
−
IH03J-100200 1
TH-12×65
4 WS-B-12 4
1B-G75 1
−
IH03J-100200 1
TH-12×65
4 WS-B-12 4
1B-G75 1
−
OUT Flange
Plug
Flange Part No.
Bolt
Washer O-ring
IH03J-200100 1
TH-10×55
4 WS-B-10 4
1B-G40 1 TPHA-1/4 1
IH03J-200160 1
TH-12×60
4 WS-B-12 4
1B-G60 1
−
IH03J-200200 1
TH-12×65
4 WS-B-12 4
1B-G75 1
−
IH03J-200200 1
TH-12×65
4 WS-B-12 4
1B-G75 1
−
• O-ring 1B-** refers to JIS B2401-1B-**.
Foot Mounting Kit
4 to P
L
R
G
H
S
TT
A
B
C
K
J
I
d2
d1
φ
φ
N
E
Q
M
D
φ
4-P
L
R
d1
d2
E
N
T
T
A
B
M
Q
C
G
F
S
H
K
(J)
(I)
D
d
4
φ
φ
φ
φ
Part
No.
Name
Part Number
Remarks
PZS-3B, 4B Q'ty PZS-5B, 6B Q'ty
10-3 O-ring 1B-P10A 1 1B-P10A 1 JIS B 2401
17 O-ring 1B-P8 1 1B-P11 2
″
18 O-ring 1B-P9 4 1B-P9 5
″
19 O-ring 1B-P5 1 1B-P14 1
″
20 O-ring 1B-P12 1 1B-P22 1
″
21 O-ring 1B-P14 1 1B-P14 1
″
01P_Piston(P21-33)_E.q 07.6.7 4:15 PM Page 33
VDS SERIES SMALL VARIABLE
VOLUME VANE PUMP
VDS Series
Small Variable Volume Vane Pump
0.5in
3
/rev
4.0gpm
1000psi
V-1
qHigh efficiency operation
with minimal power loss
All the performance of the original
new VDR series mechanisms
combines with precision machin-
ing for a pump that minimizes
power loss, especially at full cut-
off.
wQuiet operation
Journal bearings with a proven
record on IP pumps plus new suc-
tion and discharge port configura-
tions reduce operating noise and
deliver quiet operation with mini-
mal vibration, even in the high-
pressure range.
eCompact and simple
design, easy operation
Compact and quiet, VDS Series
variable vane pumps are economi-
cal and easy to handle. A simple
design allows use in a wide range
of hydraulic systems.
rPrecise characteristics,
prompt response
Prompt response at both ON-OFF
and OFF-ON ensures instanta-
neous, stable, high-precision oper-
ation.
tSolidly built for high effi-
ciency and long life
VDS Series pumps are built to
last, with a design that incorpo-
rates years of NACHI experience
and know-how. Specially selected
materials and skilled workman-
ship provide outstanding durability
along with stable, high-efficiency
operation.
¡Handling
zThe direction of rotation for this
pump is clockwise (rightward) when
viewed from the shaft side.
xDrain piping must be direct piping up
to a point that is below the tank fluid
level, and back pressure due to pipe
resistance should not exceed
0.03MPa.
cWhen adjusting pressure, pressure
is increased by clockwise (right-
ward) rotation of the adjusting screw
and decreased by counterclockwise
(leftward) rotation.
vWhen adjusting the flow rate, the
flow rate is decreased by clockwise
(rightward) rotation of the adjusting
screw and increased by counter-
clockwise (leftward) rotation. The
graph on the right provides general
guidelines for the relationship
between the rotation angle of the
flow rate adjusting screw and the no-
load discharge rate.
bFactory Default P-Q Settings
(Standard Model)
•
Flow Rate Setting = Maximum flow
rate for model as indicated in the
catalog
•
Pressure Setting = Pressure shown
in table below
However:Q=q × n × 10
−3
Q : No-load Discharge Rate (r/min)
q : Capacity (cm
3
/rev)
N : Revolution Speed min
−1
The values indicated above are at
maximum pump discharge volume
with the flow volume adjusting screw
at the 0° position.
The broken line shows the flow volume
adjustment range lower limit value.
nThrust Screw
The thrust screw is precision adjust-
ed at the factory during assembly.
Never touch the thrust screw.
See callout 9 in the cross-section
diagram on page V-4.
mInitial Operation
Before operating the pump for the
first time, put the pump discharge
side into the no-load state and then
repeatedly start and stop the motor
to bleed all air from inside the pump
and the suction piping. After confirm-
ing that the pump is discharging oil,
continue the no-load operation for at
least 10 minutes to discharge all the
air from the circuit.
,For the hydraulic operating fluid, use
an R&O type and wear-resistant type
of ISO VG32 to 68 or equivalent (vis-
cosity index of at least 90). Use
hydraulic operating fluid that pro-
vides kinematic viscosity during
operation in the range of 20 to
150mm
2
/s.
.The operating temperature range is
15 to 60°C. When the oil temperature
at startup is 15°C or less, perform a
warm-up operation at low pressure
until the oil temperature reaches
15°C. Use the pump in an area where
the temperature is within the range
of 0 to 60°C.
(Continued on following page)
Features
Specifications
0.61
0.48
0.36
0.24
0.18
0.12
3
Pump capacity q in /rev
Factory Default
Pressure Settings
MPa{psi}
1 : 2.0 {286}
2 : 3.5 {500}
3 : 7.0 {1000}
Model
Delivery
(r/min (gpm) at No-Load)
Pressure
Adjust Range
kgf/cm
2
(psi)
Drive Speed (rpm)
Max. Setting
Pressure
kgf/cm
2
(psi)
Weight
kgf (rbs)
Foot Mounting Flange Mounting 1800rpm 1500rpm Minimum Maximum
VDS-OA-1A1-E11 VDS-OB-1A1-E11
15
(4.0)
12.5
(3.3)
10
~
20
(143
~
286)
800 1800
20
(286)
A-type 6.5
(14.3)
B-type 4.5
(9.9)
VDS-OA-1A2-E11 VDS-OB-1A2-E11
15
~
35
(214
~
500)
35
(500)
VDS-OA-1A3-E11 VDS-OB-1A3-E11
30
~
70
(429
~
1000)
70
(1000)
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 1
⁄0Suction pressure is -0.03 to
+0.03MPa (-4.3 to +4.3psi), and
the suction port flow rate should
to be no greater than 2m/sec.
⁄1Avoid pulley, gear, and other
drive systems that impart a radi-
al or thrust load on the end of
the pump shaft.
Mount the pump so its pump
shaft is oriented horizontally.
⁄2Provide a suction strainer with a
filtering grade of about 100 μm
(150 mesh). For the return line to
the tank, use a 25 μm line filter.
⁄3Manage hydraulic operating
fluid so contamination is main-
tained at class NAS10 or lower.
Take care to avoid contamina-
tion with water or other foreign
matter, and watch for discol-
oration. Whitish fluid indicates
that air has contaminated the
fluid, and brownish fluid indi-
cates the fluid is dirty.
⁄4Contact your agent about using
water- and glycol-based
hydraulic operating fluids.
⁄5At startup, repeat the inching
operation (start-stop) to bleed air
from the pump and pipes.
⁄6Equip an air bleed valve in cir-
cuits where it is difficult to bleed
air before startup.
⁄7To ensure proper lubrication of
the pump's rubbing surfaces,
supply oil to the interior of the
pump before starting operation.
⁄8When centering the pump shaft,
eccentricity with the motor shaft
should be no greater than
0.05mm.
The angle error should be no
greater than 1°.
V-2
OUT
DR
PCD 106.4
(4.17)
1/2" SAE IN3/8" SAE OUT
1/4" SAE DR
Flow rate adjusting screw
Pressure adjusting screw
4 to 11
(0.43)
25
(0.98)
17.5
(0.69)
25(0.98)
33(1.30)
MAX 199.8(7.87)
135(5.31)
50.8(2.00)
47(1.85)
96(3.78)
14.5
(0.57)
118.5(4.67)
13(0.51)
59.5(2.34)
99.5(3.92)
26
(1.02)
100(3.94)
61(2.40)
2-36.5
(1.44)
127(5.00)
152.5(6.00)
17.73
0
–0.25
3.97
+0.03
0
65(2.56)
84(3.31)
φ
φ
15.875
(
)
φ
0
–0.025
0.625
0.624
69.8
±0.1
(2.752)
(2.744)
Understanding Model Numbers
Installation Dimension Drawings
VDS-0A-1A-*-E11
Foot Mounting Type mm (inch)
Note) Foot Mounting Kit: IHM-2-10
Design number
Pressure adjustment range
1: 1 to 2MPa {146 to 292psi} 2: 1.5 to 3.5MPa {218 to 500psi}
3: 3 to 7MPa {437 to 1000psi}
Mounting method
A: Foot type mounting B: Flange type mounting
Ring size 1: 4.0gpm (1800 min no load)
Pump size: 0
–1
Pump Type: VDS Series Compact Variable Vane Pump
–– –
VDS O 1A E11
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 2
V-3
Performance Curves
VDS-0B-1A-*-E11
Flange Mounting
Typical characteristics at hydraulic operating fluid kinematic
viscosity of 32 mm
2
/s
Discharge pressure P MPa{kgf/cm }
Discharge pressure P MPa{kgf/cm }
01234567
{10.2} {20.4} {30.6} {40.8} {51.0} {61.2} {71.4}
0
0 234567
{20.4}
1
{10.2} {30.6} {40.8} {51.0} {61.2} {71.4}
0.5
1.0
1.5
5
10
15
1A1
1800min
1800min
–1
1800min
–1
1500min
–1
1500min
–1
–1
1800min
–1
1500min
–1
1500min
–1
1A2
1A3
0.2
0
0.6
0.4
1.0
0.8
Q
2
Discharge pressure P MPa{kgf/cm }
0 234567
{20.4}
1
{10.2} {30.6} {40.8} {51.0} {61.2} {71.4}
50
60
70
80
Measurement Position: 1 meter behind pump
2
2
Discharge rate Q /min
Input Lin (kW)
Power loss kW
Noise level dB(A)
1/4" SAE
DR
1/2" SAE
IN
3/8" SAE
OUT
(IN-OUT port dimension)
Width
across flats
DR
OUT
Pressure adjusting screw
Flow rate adjusting screw
82.55
0
0
–0.05
MAX 58
10
4
125
106
5.5
2-
11
100
26
61
17.73
0
–0.25
3.97
+0.03
0
25
15.875
–0.025
33
65
MAX 130
42
20
3282
118.5
φ
φ
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 3
V-4
Cross-sectional Drawing
VDS-0B-1A*-E11
Part No.
Part Name
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Key
Nut
O-ring
O-ring
O-ring
O-ring
O-ring
Screw
Bearing
Screw
Screw
Oil seal
Snap ring
Pin
Nameplate
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Body
Cover (A)
Cover (B)
Shaft
Cam ring
Vane
Plate (S)
Plate (H)
Thrust screw
Screw
Piston
Holder
Spring
Nut
Cap
List of Sealing Parts
Seal Kit: VBAS-200B00
Applicable Pump Model: VDS-0A/B-1A
*
-E11
Note)
1.Oil seals are manufactured by Nippon Oil Seal
Industry Co. Ltd. (NOK).
2.O-ring 1A/B-** refers to JIS B2401-1A.
Part No.
Part Name Part Number Q'ty
18 O-ring AS568-032 1
19 O-ring AS568-023 1
20 O-ring S71 (NOK) 1
21 O-ring 1A-P20 1
22 O-ring 1A-P10 2
27 Oil seal TCN-17358 1
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 4
V-5
VDR 22 DESIGN SERIES VARIABLE
VOLUME VANE PUMP
VDR22 Design Series
Variable Volume Vane Pump
7.9gpm at 2000psi
10.5gpm at 1000psi
qStable, highly efficient
operation up to 14MPa
A biased piston that minimizes ring
vibration and leak-free pressure bal-
ance construction enables highly effi-
cient high-pressure operation, and
very stable performance up to 14MPa.
wHigh-precision instanta-
neous response
Response has been improved by a
special bias piston mechanism.
Prompt response at both ON-OFF and
OFF-ON ensures instantaneous, sta-
ble, high-precision operation.
eSilent operation, even in
the high pressure range
Quiet journal bearings, a bias piston
that allows a 3-point support system,
and new suction and discharge port
shapes all contribute to minimize
operation noise. Silent, vibration-free
operation is ensured, even in the high
pressure range.
rReduced power loss
A combination of NACHI-original
mechanical innovations and precision
machining create a pump that mini-
mizes power loss, especially at full
cutoff.
t
Solid construction stands up to
harsh operating conditions
The tough and rugged construction of
this pump is made possible by a long
history of quality pump designs. This,
in combination with specially selected
materials and skilled workmanship,
provides outstanding durability.
¡Handling
z
Rotation Direction
The direction of rotation is always is
clockwise (rightward) when viewed
from the shaft side.
x
Drain
Drain piping must be direct piping up to
a point that is below the tank fluid level,
and back pressure due to pipe resis-
tance should not exceed 0.03MPa.
When using a pump that has drain ports
at two locations, use the drain port that
is higher after the pump is installed.
c
Discharge Volume Adjustment
The discharge flow rate is decreased
by clockwise (rightward) rotation of
the discharge rate adjusting screw,
and increased by counterclockwise
(leftward) rotation. Loosen the lock nut
before making adjustments. After
adjustment is complete, re-tighten the
lock nut. The graph on the right pro-
vides general guidelines for the rela-
tionship between the rotation angle of
the flow rate adjusting screw and the
no-load discharge rate.
(Continued on following page)
Features
Specifications
0
0.30
0.42
0.60
0.91
1.20
1.52
90 180 270 360 450
3
Pump capacity in /rev
Single Pump
Model type
Delivery at no load
r/min (gpm)
Pressure
adjusting
range
kgf/cm
2
(psi)
Drive speed
rpm
Max. setting
pressure
kgf/cm
2
(psi)
Weight
kg (lbs)
Foot Mounting Flange Mounting 1800 r.p.m. 1500 r.p.m. 1200 r.p.m. Max. Min.
VDR-1A-1A2-*22 VDR-1B-1A2-*22
30
(7.9)
25
(6.6)
20
(5.3)
15
~
35
(214
~
500)
1800 800
35
(500)
9
(19.9)
VDR-1A-1A3-*22 VDR-1B-1A3-*22
30
~
70
(429
~
1000)
70
(1000)
VDR-1A-1A4-*22 VDR-1B-1A4-*22
65
~
105
(929
~
1500)
105
(1500)
VDR-1A-1A5-*22 VDR-1B-1A5-*22
90
~
140
(1286
~
2000)
140
(2000)
VDR-1A-2A2-*22 VDR-1B-2A2-*22
40
(10.6)
33
(8.7)
27
(7.1)
15
~
35
(214
~
500)
1800 800
35
(500)
9
(19.9)
VDR-1A-2A3-*22 VDR-1B-2A3-*22
30
~
70
(429
~
1000)
70
(1000)
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 5
However: Q=q
×
n
×
10
−
3
Q :No-load Discharge Rate Q r/min
q :Volume cm
3
/rev
N :Revolution Speed min
−
1
The broken line shows the flow
volume adjustment range lower
limit value.
Note)
The values indicated above are at max-
imum discharge volume with the flow
volume adjusting screw at the 0
°
posi-
tion.
vPressure Adjustment
Pressure is decreased by clock-
wise (rightward) rotation of the
discharge rate adjusting screw,
and increased by counterclock-
wise (leftward) rotation.
bFactory Default P-Q Settings
(Standard Model)
•
Flow Rate Setting = Maximum
flow rate for model as indicated
in the catalog
•
Pressure Setting = Pressure
shown in table to the right
nThrust Screw
The thrust screw is precision
adjusted at the factory during
assembly. Never touch the
thrust screw. See callout @1 in
the cross-section diagram on
page V-9.
mInitial Operation
Before operating the pump for
the first time, put the pump dis-
charge side into the no-load
state and then repeatedly start
and stop the motor to bleed all
air from inside the pump and the
suction piping. After confirming
that the pump is discharging oil,
continue the no-load operation
for at least 10 minutes to dis-
charge all the air from the cir-
cuit.
Provide an air bleed valve in cir-
cuits where it is difficult to bleed
air before startup.
,Sub Plate
Use the following table for speci-
fication when a sub plate is
required.
For detailed dimensions, see
pages.
.For the hydraulic operating fluid,
use type ISO VG32 or equiva-
lent (viscosity index of at least
90) for pressures of 7MPa or
lower, and type ISO VG68 or
equivalent (viscosity index of at
least 90) for pressures greater
than 7MP.
⁄0The operating temperature
range is 15 to 60°C. When the
oil temperature at startup is
15°C or less, perform a warm-up
operation at low pressure until
the oil temperature reaches
15°C. Use the pump in an area
where the temperature is within
the range of 0 to 60°C.
⁄1Suction pressure is -0.03 to
+0.03MPa (-0.3 to +0.3kgf/cm
2
),
and the suction port flow rate
should be to greater than 2m/sec.
⁄2Avoid pulley, gear, and other
drive systems that impart a radi-
al or thrust load on the end of
the pump shaft. Mount the pump
so its pump shaft is oriented
horizontally.
(Continued on following page)
V-6
–– –
Design code
Pressure adjusting range
2: 15
~
35kgf/cm
2
(214
~
500psi)
3: 30
~
70kgf/cm
2
(429
~
1000psi)
4: 65
~
105kgf/cm
2
(929
~
1500psi)
5: 90
~
140kgf/cm
2
(1286
~
2000psi)
Mounting
A: Subplate mounting
B: Flange mounting
Ring size
1: 30R/min (7.9gpm) at 1800rpm
2: 40R/min (10.6gpm) at 1800rpm
Pump size-1
Pressure volume characteristics
A: Constant volume type
VDR series Nachi variable volume vane pump
VDR 1 A 1 A 5 22
No Code: PT for piping and metric for others
E: NPT for piping and metric for others
Understanding Model Numbers
Factory Default
Pressure Settings
MPa{kgf/cm
2
}
2 : 3.5 {35.7}
3 : 3 {30.6}
4 : 6.5 {66.3}
5 : 9 {91.8}
Single pump
Pump Model No.
Sub Plate Number
Motor(kW)
VDR-1A-1A*-22
MVD-1-115-10
0.75 to 1.5
MVD-1-135-10
2.2 to 3.7
VDR-1A-2A*-22
MVD-1-115Y-10
0.75 to 1.5
MVD-1-135Y-10
2.2 to 3.7
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 6
V-7
⁄3
Provide a suction strainer with a fil-
tering grade of about 100
μ
m (150
mesh). For the return line to the
tank, use a 25
μ
m line filter.
⁄4
Manage hydraulic operating fluid so
contamination is maintained at
class NAS10 or lower. Take care to
avoid contamination with water or
other foreign matter, and watch out
for discoloration. Whitish fluid indi-
cates that air has contaminated the
fluid, and brownish fluid indicates
the fluid is dirty.
⁄5
Contact your agent about using
water- and glycol-based hydraulic
operating fluids.
⁄6
At startup, repeat the inching opera-
tion (start-stop) to bleed air from the
pump and pipes.
⁄7
Equip an air bleed valve in circuits
where it is difficult to bleed air
before startup.
⁄8
To ensure proper lubrication of the
pump's rubbing surfaces, supply oil
to the interior of the pump before
starting operation.
⁄9
When centering the pump shaft,
eccentricity with the motor shaft
should be no greater than 0.05mm.
Use a pump mounting base of suffi-
cient rigidity. The angle error
should be no greater than 1
°
.
Installation Dimension Drawings
VDR-1A-*A*-22
VDR-1B-*A*-22
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 7
V-8
Performance Curves
Typical characteristics at hydraulic operating fluid kinematic vis-
cosity of 32 mm
2
/s
Power Loss Curves at
Full-cut off
Noise Level
measured at 1m behind pump
VDR-1*-1A2-22 VDR-1*-1A3-22 VDR-1*-1A4-22
VDR-1*-1A5-22 VDR-1*-2A2-22 VDR-1*-2A3-22
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 8
V-9
Cross-sectional Drawing
13
35
37
14
4
18 25 12 11
7
8
34
21
22
15
16 33
32 17 24
42 43 42
38
26
46
20
3
36
30
41
31
29 10 47
39
1
9
19
27
28 23
5
40
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Body (A)
Body (B)
Cover
Cover
Shaft
Rotor
Ring
Vane
Plate (S)
Plate (H)
Piston
Spring
Screw
Nut
Piston
Holder
Adapter
Packing
Bearing (S)
Bearing (H)
Thrust screw
Nut
Key
Screw
Part No.
Part Name
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Pin
Spring pin
Oil seal
Snap ring
Backup ring
Backup ring
O-ring
O-ring
O-ring
O-ring
O-ring
Screw
Screw
Nut
Plug
O-ring
O-ring
O-ring
O-ring
Screw
Key
Nameplate
Cap
Pin
VDR-1A-*A*-22
List of Sealing Parts
Single Pump
Note)
1. Oil seals are manufactured by Nippon Oil Seal Industry Co. Ltd. (NOK).
2. O-ring 1A-** refers to JIS B2401-1A-**.
3. For VDR-1B-*-22, the seal kit number becomes VDBS-101B00,
without the 42 and 43 O-rings.
Part
No.
Applicable Pump Model No.
VDR-1A-*-22
Seal Kit Number
VDBS-101A00
Part Name Part Number Q'ty
18 Packing VDB32-101000 1
27 Oil seal ISRD-224211 1
29 Backup ring VDB34-101000 1
30 Backup ring VDB34-201000 1
31 O-ring S85(NOK) 1
32 O-ring 1A-P22 1
33 O-ring 1A-P5 1
34 O-ring 1A-P14 1
35 O-ring 1A-P12 1
40 O-ring AS568-036 1
41 O-ring AS568-029 1
42 O-ring 1A-P22 2
43 O-ring 1A-P10A 1
VDR-1A
VDC-1A
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 9
V-10
qHigh efficiency, high pres-
sure operation
The unique pressure regulator and
pressure balance mechanism, plus the
exclusive three-point ring support sys-
tem has improved performance during
high pressure operation. The pump
operates with high efficiency and sta-
ble performance up to a maximum of
140kgf/cm
2
(2000 psi).
wLow vibration and noise
levels
The new mechanisms reduces vibra-
tion and noise levels. Of particular
note is the unique and exclusive three-
point support system which uses, a
regulating piston and a bias piston to
eliminate vibration. The mechanism,
together with improvements to the
shape of the inlet and outlet ports and
high performance journal bearings,
has reduced the noise level during
operation.
eFast response
The ring stopper mechanism serves to
allow swift response whether in start-
ing, stopping, or with load fluctuations,
for high precision operation.
r
Stable discharge with sharp
cut-off characteristics
A revolutionary pressure compen-
sator type pressure regulation
mechanism provides, stable sharp
cut-off characteristics. The com-
pensator serves to provide stable
and constant volume through our
the pressure ranges.
tHigh efficiency operation
with reduced power loss
Efficiency has been improved with
the new mechanisms and Nachi's
high precision machining technolo-
gy. Power loss has been reduced,
expecially during dead-heading.
yEasy adjusting in mainte-
nance and handling
Maintenance is easier due to the
positioning of the pressure adjust-
ing mechanism and the volume
adjusting mechanism on the same
side of the pump.
Features
Overview
The VDC series high pressure vari-
able volume vane pumps are a new
series of pumps. In addition to Nachi's
three exclusive mechanisms (pres-
sure control; pressure balance; ring
stopper mechanism), a unique and
exclusive three-point ring support sys-
tem which makes maximum utilization
of high pressure oil has been adopted
to provide stable high pressure and
quiet operation.
The new series of hydraulic pumps
are ideal for applications, such as:
machine tools, industrial machinery
and vehicles.
VDC SERIES HIGH PRESSURE TYPE
VARIABLE VOLUME VANE PUMP
VDC Series
High-Pressure Type Variable Volume Vane Pump
7.9 to 31.7gpm
2000psi
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 10
V-11
Specifications
Single Pump
Double Pump
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 11
V-12
¡Handling
zThe rotation is clockwise as
viewed from the shaft side.
xDrain Drain piping must be direct
piping up to a point that is below
the tank fluid level, and piping
should comply with the conditions
shown in the table below to
ensure that back pressure due to
pipe resistance does not exceed
0.1MPa. When using a pump that
has drain ports at two locations,
use the drain port that is higher
after the pump is installed.
In the case of a double pump,
run separate pipes from both
the shaft side and the head side
drains directly connect to the
tank, so the drain pipe is below
the surface of the oil.
cDischarge Volume Adjustment
The discharge flow rate is
decreased by clockwise (right-
ward) rotation of the discharge
rate adjusting screw, and
increased by counterclockwise
(leftward) rotation.
Loosen the lock nut before making
adjustments. After adjustment is
complete, re-tighten the lock nut.
The graph below provides general
guidelines for the relationship
between the rotation angle of the
flow rate adjusting screw and the
no-load discharge rate.
However: Q=q
×
N
×
10
−3
Q:
No-load Discharge RateQr/min
q : Volume cm
3
/rev
N : Revolution Speed min
−1
vPressure Adjustment Pressure is
increased by clockwise (right-
ward) rotation of the discharge
rate adjusting screw, and
decreased by counterclockwise
(leftward) rotation.
Loosen the lock nut before making
adjustments. After adjustment is
complete, re-tighten the lock nut.
bP-Q adjustment at time of ship-
ment from plant
°
Flow adjustment: Has already
been adjusted to maximum
flow indicated for the model
type in the catalog.
°
Pressure adjustment: Has
already been adjusted to pre-
set pressures given in Table
below:
nThrust Screw and Stopper
The thrust screw and stopper
are precision adjusted at the
factory during assembly. Never
touch them.
See callouts 15/43 and 15/38 in
the VDC-1A and 2A/3A cross-
section diagrams on pages V-19
and V-20.
mAn unload circuit is required
when the motor is started under
condition λ
−
Δ. Contact your
agent about the unload circuit.
,Initial Operation Before operating
the pump for the first time, put
the pump discharge side into the
no-load state and then repeatedly
start and stop the motor to bleed
all air from inside the pump and
the suction piping. After confirm-
ing that the pump is discharging
oil, continue the no-load opera-
tion for at least 10 minutes to dis-
charge all the air from the circuit.
Provide an air bleed valve in cir-
cuits where it is difficult to bleed
air before startup.
.Sub Plate
Use the table below for to speci-
fy a sub plate type when one is
required.
(Continued on following page)
0
0.7
1.2
0.5
0.4
0.6
2.4
1.8
3.0
4.2
3.6
90 180 270 360 450
VDC-3
3
Pump capacity q in /rev
Note)
The values indicated above are at
maximum pump discharge volume
with the flow volume adjusting screw
at the 0°position.
The broken line shows the flow volume
adjustment range lower limit value.
Model No.
Item
VDC-1 VDC-2 VDC-3
Pipe Joint
Size
At least
1/4"
At least
1/4"
At least
3/8"
Pipe I.D.
At least
φ
7.6
At least
φ
7.6
At least
φ
9.6
Pipe
Length
1m or
less
1m or
less
1m or less
CW: Pressure increases
CCW: Pressure decreases
CCW: Flow increases
CW: Flow decreases
Pump pressure
adjusting range
Preset pressure
when shipped
from plant
2: 15
~
35 kgf/cm
2
(214
~
500 psi)
3: 20
~
70 kgf/cm
2
(286
~
1000 psi)
4: 50
~
105 kgf/cm
2
(714
~
1500 psi)
5: 70
~
140 kgf/cm
2
(1000
~
2000 psi)
35 kgf/cm
2
(500 psi)
35 kgf/cm
2
(500 psi)
50 kgf/cm
2
(714 psi)
70 kgf/cm
2
(1000 psi)
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 12
V-13
⁄0Foot Mounting
For a double pump with VDC-3 foot
mounting, the foot mounting kit
and pump are sold as a set. When
only the mounting feet are
required, pump mounting bolts,
washers and other parts are sold
together as the Foot Mounting Kit.
⁄1Hydraulic oil: When the pump is
to be used at pressures of less
than 70kgf/cm
2
(1000 psi), use
good quality petroleum base
hydraulic oil with a rating of
30
~
50cSt (141
~
232 SUS) (equiv-
alent to ISO VG32) at 40˚C
(104˚F). Operation at pressure
exceeding 70kgf/cm2 (1000 psi),
use oil with a rating of 50
~
70cSt
(232
~
324 SUS) (equivalent to
ISO VG68) at 40˚C (104˚F).
⁄2The operating temperature range
is 15 to 60°C. When the oil temper-
ature at startup is 15°C or less,
perform a warm-up operation at
low pressure until the oil tempera-
ture reaches 15°C. Use the pump
in an area where the temperature
is within the range of 0 to 60°C.
⁄3Suction pressure is -0.03 to
+0.03MPa (-4.3 to +4.3psi), and the
suction port flow rate should be no
greater than 2m/sec.
⁄4Avoid pulley, gear, and other
drive systems that impart a radi-
al or thrust load on the end of
the pump shaft.
Mount the pump so its pump
shaft is oriented horizontally.
⁄5Provide a suction strainer with a
filtering grade of about 100
μ
m
(150 mesh). For the return line to
the tank, use a 25
μ
m line filter.
⁄6Manage hydraulic operating fluid
so contamination is maintained at
class NAS10 or lower. Take care
to avoid contamination with water
and other foreign matter, and
watch out for discoloration.
Whitish fluid indicates that air has
contaminated the fluid, and brown-
ish fluid indicates the fluid is dirty.
⁄7Contact your agent about using
water- and glycol-based hydraulic
operating fluids.
⁄8At startup, repeat the inching
operation (start-stop) to bleed air
from the pump and pipes.
⁄9Equip an air bleed valve in cir-
cuits where it is difficult to bleed
air before startup.
¤0To ensure proper lubrication of the
pump's rubbing surfaces, supply
oil to the interior of the pump
before starting operation.
¤1Alignment: Alignment between
the pump shaft and the motor
shaft should be parallel within
0.05mm (0.002 inch), and within
1˚ for the angle between the two
shafts. Use a pump mounting
base of sufficient rigidity.
Pump Model No. Sub Plate Number Motor (kW)
VDC-1A-1A*-20
MVD-1-115-10 0.75 to 1.5
MVD-1-135-10 2.2 to 3.7
VDC-1A-2A*-20
MVD-1-115Y-10 0.75 to 1.5
MVD-1-135Y-10 2.2 to 3.7
VDC-2A-*A*-20
MVD-2-135-10 2.2 to 3.7
MVD-2-160-10 5.5
VDC-2A-2A*-20 MVD-2-160Z-10 5.5
Sub Plate Number
Understanding Model Numbers
Single Pump
–– ––
Design code
E20 = VDC-1A, VDC-2A, VDC-3A/B
E35 = VDC-1B, VDC-2B
20 = All metric version
Pressure adjusting range
2: 15
~
35 kgf/cm
2
214
~
500 psi
3: 20
~
70 kgf/cm
2
286
~
1000 psi
4: 50
~
105 kgf/cm
2
714
~
1500 psi
5: 70
~
140 kgf/cm
2
1000
~
2000 psi
VDC series variable volume vane pump
Pump size: 1, 2, 3
Mounting
A: Foot mounting
B: Flange mounting
Pressure volume characteristics
A: Constant volume type
Ring size: 1, 2
VDC 2 A 1 A 4 20/35
Note: Remote control pressure compensating type is available. Please check with factory.
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 13
V-14
Double Pump
––––
Design code
E35 = VDC-11B, VDC-12B
E20 = VDC-13B
20 = All metric version
Pressure adjusting range of shaft end pump
3: 20
~
70 kgf/cm
2
286
~
1000 psi
5: 70
~
140 kgf/cm
2
1000
~
2000 psi
Mounting B: Flange mounting
Ring size of head end pimp
Pressure volume characteristics of head end pump
Pressure adjusting range of head end pump
Pump size of shaft end pump: 1, 2, 3
Pump size of head end pump: 1, 2
Pressure volume characteristics of shaft end pump
A: Constant volume type
Ring size of shaft end pump: 1, 2
VDC series double variable volume vane pump
VDC 1 2 B 1 A 5 2 A 3 20
Installation Dimension Drawings
VDC-1A-*A*-*20 mm(inch)
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 14
V-15
VDC-2A-*A*-*20 mm(inch)
VDC-1B-*A*-E35
(SAE-A MOUNT)
VDC-3A-1A*-*20 mm(inch)
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:02 PM Page 15
V-16
VDC-2B-*A*-E35
(SAE-B MOUNT)
VDC-3B-A*-20 mm(inch)
(SAE-C MOUNT)
VDC-11B-*A*-*A*-E35 mm(inch)
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:03 PM Page 16
V-17
VDC-12B-*A*-*A*-E35 mm(inch)
VDC-22B-*A*-*A*-E35 mm(inch)
VDC-13B-*A*-*A*-*20 mm(inch)
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:03 PM Page 17
V-18
Performance Curves
Power loss
Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm
2
/s
pressure
0 3.5 10.5 14.0
500 1500 2000
(mpa)
(psi)
7.0
1000
1800min
–1
1500min
–1
0
0.5
1.5
2.0
1.0
VDC-1
Power loss at full cutoff kW
(mpa)
(psi)
Pressure
0 3.5 10.5 14.0
500 1500 2000
7.0
1000
1800min
–1
1500min
–1
1
3
4
2
VDC-2
Power loss at full cutoff kW
(mpa)
(psi)
Pressure
0 3.5 10.5 14.0
500 1500 2000
7.0
1000
1800min
–1
1500min
–1
1
3
5
4
2
VDC-3
Power loss at full cutoff kW
VDC-1A(B)-1A3-20/35 VDC-2A(B)-1A3-20/35 VDC-3A(B)-1A3-20
VDC-1A(B)-1A5-20/35 VDC-2A(B)-1A5-20/35 VDC-3A(B)-1A5-20
VDC-1 VDC-2 VDC-3
Noise Characteristics
VDC-1*-1A*-20/35 VDC-2*-1A*-20/35 VDC-3*-1A*-20/35
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:03 PM Page 18
V-19
VDC-1A-*A*-E20/35
VDC-2A-*A*-E20/35
Cross-sectional Drawing
Part No.
Part Name
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Key
Pin
Holder
Holder
Orifice
Oil seal
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
Backup ring
Part No.
Part Name
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
Backup ring
Cap
Snap ring
Screw
Screw
Screw
Screw (stopper)
Screw
Plug
Plug
Pole
Nameplate
Valve body
Spool
Holder
Plunger
Spring
Retainer
Screw
Nut
O-ring
O-ring
Plug
Plug
Screw
Note) Seal kit = VCBS-101A00 (VDC-1A)
Seal kit = VCBS-101B00 (VDC-1B)
Seal kit = VCBS-102A00 (VDC-2A)
Seal kit = VCBS-102B00 (VDC-2B)
Part
No.
Applicable Pump Model No.
VDC-1A-*-20 VDC-2A-*-20
Seal Kit Number
VCBS-101A00 VCBS-102A00
Part Name Part Number Q'ty Part Number Q'ty
24 Oil seal TCV-224211 1 TCN-325211 1
25 O-ring S85(NOK) 1 1A-G115 1
26 O-ring AS568-034 1 AS568-150 1
27 O-ring AS568-026 1 AS568-134 1
28 O-ring 1A-P14 1 1A-P18 1
29 O-ring 1A-P22 1 1A-G35 1
30 O-ring 1A-P20 1 1A-G35 1
31 O-ring 1A-P5 2 1A-P9 2
32 O-ring 1A-P6 4 1A-P7 4
33 O-ring 1A-P25 1 1A-G35 1
34 O-ring 1A-P22 1 1A-G35 1
35 O-ring 1A-P10A 1 1A-P15 1
36 Backup ring
VCB34-101000
1
VCB34-102000
1
37 Backup ring
VCB34-201000
1
VCB34-202000
1
57 O-ring 1A-P14 1 1A-P14 1
58 O-ring
1B-P6(Hs90)
3
1B-P6(Hs90)
3
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Body (1)
Body (2)
Cover (1)
Cover (2)
Shaft
Ring
Vane
Plate (S)
Plate (H)
Piston (1)
Piston (2)
Bearing
Bearing
Spring
Thrust screw
Screw
Nut
Nut
Seal Component Table (VDC-1*, VDC-2*)
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:03 PM Page 19
V-20
VDC-3A-1A*-E20
39
38
29
5
27
14
12
8
28
17
32 7
11
22
27
21
29
16
18
21
40
30
2
13
42
24
25
10
15
1
34
9
13
23
33
3
35
41
19
6
54
53
45
46
44
56
48 52
47
49
51
50
4
37
31
43
26
20
36
Part No.
Part Name
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Nut
Nut
Key
Pin
Holder
Orifice
Oil seal
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
Cap
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Body (1)
Body (2)
Mounting
Cover (1)
Cover (2)
Shaft
Ring
Vane
Plate (S)
Plate (H)
Piston (1)
Piston (2)
Bearing
Spring
Thrust screw
Screw
Part No.
Part Name
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Snap ring
Screw
Screw
Screw
Screw
Screw (stopper)
Screw
Plug
Washer
Nameplate
Pole
Valve body
Spool
Holder
Plunger
Spring
Retainer
Screw
Nut
O-ring
O-ring
Plug
Plug
Screw
Seal Component Table (VDC-3*)
Note) Seal kit = VCBS-103B00
Part
No.
Applicable Pump Model No.
VDC-3A(B)-*-20
Seal Kit Number
VCBS-103B00
Part Name Part Number Q'ty
23 Oil seal TCN-385811 1
24 O-ring 1A-G130 1
25 O-ring
AS568-154(Hs90)
1
26 O-ring
AS568-151(Hs90)
1
27 O-ring 1A-G40 2
28 O-ring 1A-P22 1
29 O-ring 1A-P9 2
30 O-ring 1A-P7 2
31 O-ring 1A-P7 2
52 O-ring 1A-P14 1
53 O-ring 1B-P6(Hs90) 3
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:03 PM Page 20
V-21
Part
No.
Part Name
VDC-11A-*-*-20 VDC-12A-*-*-20 VDC-22A-*-*-20 VDC-13A-*-*-20
Part Number
Q'ty
Part Number
Q'ty
Part Number
Q'ty
Part Number
Q'ty
6 O-ring
⎯
1A-G60 1 1A-G60 1
⎯
7 O-ring 1A-G85 1 1A-G45 1 1A-G60 1 1A-G85 1
VDC Series
Double Pump
Note)
• See the description of the single pump for seal parts that are not included in the list.
List of Sealing Parts
4
7
9
10
2
5
6
8
1
3
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
Body (2)
Body (3)
Shaft (S)
Shaft (H)
Joint
O-ring
O-ring
Screw
Screw
Screw
Note: Other parts are same as single pump.
02V_Vane Pumps(P01-24)_E.q 07.6.7 4:03 PM Page 21
UVN Series
Variable Volume Vane Uni-Pump
The New Uni-Pump All-in-One Pump and Motor
Get all of the power and almost none of the noise with our new
Uni-Pump integrated variable vane pump and motor. Featuring our
original pump and electromotor shaft connection, the Uni-Pump
produces limited noise.
This compact, all-in-one type even consumes 40% less energy than
standard models. Pump capacities up to 7.6gpm with 1160psi. Low
heat generation results in a longer operation life.
Specifications
Model
Vane pump side
Motor
side
AC230V
Weight
lbs.
Delivery gpm
at no load
Pressure
Adjustment
Range psi
UVN-1A-0A2-0.7E-4M-11
3.8
219~562
1HPX4p 41.9
UVN-1A-0A2-1.5E-4M-11 2HPX4p 48.5
UVN-1A-0A3-0.7E-4M-11
510~872
1HPX4p 41.9
UVN-1A-0A3-1.5E-4M-11 2HPX4p 48.5
UVN-1A-0A4-0.7E-4M-11
802~1165
1HPX4p 41.9
UVN-1A-0A4-1.5E-4M-11 2HPX4p 48.5
UVN-1A-1A2-1.5E-4M-11
7.6
219~582
2HPX4p 48.5
UVN-1A-1A2-2.2E-4M-11 3HPX4p 58.4
UVN-1A-1A3-1.5E-4M-11
510~872
2HPX4p 48.5
UVN-1A-1A3-2.2E-4M-11 3HPX4p 68.4
UVN-1A-1A4-1.5E-4M-11
802~1165
2HPX4p 48.5
UVN-1A-1A4-2.2E-4M-11 3HPX4p 68.4
Motor Selection Method
The available range in the the rated output of each motor is
shown below the output curve of each motor in the graph.
(Example)
Find the motor to be used at a pressure of 3.5MPa (507psi)
discharge rate of 3.2gpm and frequency of 60Hz.
(Solution)
As illustrated by the broken line in the graph, you are looking for
the motor located above the crossing port between the pressure
of 3.5MPa (507psi) and discharge rate of 3.2gpm.
Model Code
Dimensional Drawings
NACHI AMERICA INC.
17500 23 Mile Road, Macomb, MI 48044
Tel. (800)622-4410 Fax. (586)226-5289
Conditions
The value in the left-hand drawing represents typical
characteristics under the following conditions:
Oil used: ISO VG32 or its equivalent
Oil temperature: 104 +/- 41ºF
Measuring distance: 3.3 feet around the unit
Note:
The noise characteristics depend on the
installation floor base conditions and the
p r esence of the surrounding substance re f l e c t i n g the
sound, and so may be different from the above
description in some cases.
Model
Dimensions (Inch)
A IL C KD E F G H J L M N TXS R* KB O P I
UVN-1A-*A*-0.7E-4M-11 0.79 3.54 3.15 6.18 2.46 1.97 0.09 4.72 2.80 9.06 6.10 4.72 0.59X0.39 0.20 4.33 2.56 5.12 3.62
UVN-1A-*A*-1.5E-4M-11 0.79 3.94 3.54 6.89 2.76 2.46 0.13 5.04 3.07 10.04 6.69 5.91 0.59X0.39 0.20 4.72 2.56 5.12 3.94
UVN-1A-*A*-2.2E-4M-11 0.79 4.33 3.94 7.68 3.15 2.76 0.13 5.43 3.46 11.22 7.87 6.50 0.67X0.47 0.24 5.28 2.56 5.31 4.33
Power Consumption
Oil Temperature Characteristics
Conditions
The value on the left-hand drawing represents typical
characteristics under the following conditions:
Oil used: ISO VG32 or its equivalent
Speed: 1800 min
-1
Room temperature: 84ºF
Motor: 0.75~2.2kW
Notes:
1. For 5.0MPa (724psi) of a 2.6 gallon tank. It should
be noted that there is a big rise in oil temperature
under continuous operation. In this case, we
recommend use of a 5.3 gallon tank.
2. Rise of oil temperature depends on the conditions
of using an actual machine, and so may be
d i f f e rent from the above description in some cases.
Noise Characteristics
Performance Characteristics -
When being used as NSP power unit with radiator