SECTIONAL
COMPACT CATALOGUE
DIRECTIONAL CONTROL VALVES
SD25
2 DBC005E
Nominal flow rating 240 l/min
Operating pressure (maximum) parallel circuit 315 bar 4600 psi
series circuit 210 bar 3050 psi
Back pressure (maximum) on outlet port T 25 bar 360 psi
Internal leakage A(B)→T
∆
p=100 bar -- 1450 psi
fluid and valve at 40
°
C
4cm
3
/min 0.24 in
3
/min
Fluid Mineral base oil
Fluid temperature with NBR (BUNA--N) seals from --20° to 80°C
with FPM (VITON) seals from --20° to 100°C
Viscosity operating range from 15 to 75 mm
2
/s from 15 to 75 cSt
min. 12 mm
2
/s 12 cSt
max. 400 mm
2
/s 400 cSt
Max level of contamination 19/16 -- ISO 4406
Ambient temperature from --40° to 60°C
NOTE -- For different conditions please contact Sales Dept.
Working conditions
Features
Simple, compact and heavy duty designed sectional valve from 1 to 12 sections for open and closed centre hydraulic systems.
H Fitted with a main pressure relief valve and a load check valve on every working section
H Available with parallel or series circuit.
H Optional carry--over port.
H A wide variety of service ports and circuit valves.
H Available manual, pneumatic, hydraulic, electro--hydraulic, and remote with flexible cables spool control kits.
H Diameter 25 mm (0.98 in) interchangeable spools.
Thiscatalogueshows technicalspecificationsanddiagrams measuredwithmineraloilof46 mm
2
/s -- 46cStviscosityat40 °Ctemper-
ature.
5
th
edition September 2003:
This edition supersedes all prior documents.
WARNING!
All specifications of this catalogue refer to the standard product at this date.
Walvoil, oriented to a continuous improvement, reserves the right to
discontinue, modify or revise the specifications, without notice.
WALVOIL IS NOT RESPONSIBLE FOR ANY DAMAGE CAUSED BY AN
INCORRECT USE OF THE PRODUCT.
Additional information
This catalogue shows the product in the most standard configurations.
Please contact Sales Dpt. for more detailed information or special request.
Dimensional data (parallel circuit)
WALVOIL
P0000001
117211009
MADE IN ITALY
Valve type
Production batch :
P00 = production year (2000)
00001 = progressive number
WALVOIL
P9900001
117211009
MADE IN ITALY
Position 1
Position 2
0
19°
19°
237
9.33
M10
135
5.31
48
1.89
137
5.39
18
0.71
Optional top outlet
(mustbeusedincarry--
over configuration)
F
E
356
14.02
218
8.58
61
2.4
104
4.09
57
2.24
67.5
2.66
135
5.31
41.5
1.63
45
1.77
77
3.03
36.5
1.44
21
0.83
62
2.44
81
3.19
21
0.83
M12
81
3.19
71
2.79
62
2.44
71
2.79
Carry--over
“C” optional
SD25
3DBC005E
T
Y
P
E
E F Weight
T
Y
P
E
E F Weight
T
Y
P
E
mm in mm in kg lb
T
Y
P
E
mm in mm in kg lb
SD25/1
235 9.25 162 6.38 37.6 83
SD25/7
607 23.9 534 21.02 103.6 228.2
SD25/2
297 11.69 224 8.82 48.6 107
SD25/8
669 26.34 596 23.46 114.6 252.4
SD25/3
359 14.13 286 11.26 59.6 131.4
SD25/9
731 28.78 658 25.9 125.6 276.6
SD25/4
421 16.57 348 13.7 70.6 155.6
SD25/10
793 31.22 720 28.34 136.6 300.8
SD25/5
483 19.02 410 16.14 81.6 180
SD25/11
855 33.66 782 30.78 147.6 325
SD25/6
545 21.46 472 18.58 92.6 204
SD25/12
917 36.1 844 33.22 158.6 349.2
Standard threads
PORTS
BSP
(ISO 228/1)
UN--UNF
(ISO 11926--1)
Inlet P G1 1 5/8--12 UN--2B (SAE 20)
A and B ports G1 15/16--12UN--2B(SAE16)
Outlet T and carry--over C G11/4 1 5/8--12 UN--2B (SAE 20)
PILOT PORTS
Hydraulic G1/4 9/16--18 UNF--2B (SAE 6)
Pneumatic NPTF 1/8--27 NPTF 1/8--27
Work port to outlet
Inlet to work port
Open centre
Performance data (pressure drop vs. flow)
0
10
20
30
40
0 90 180 270
Flow
Pressure drop
From side inlet to side outlet.
From side inlet to A port (spool in position 1)orB port (spool in position 2).
From A port (spool in position 2)orB port (spool in position 1) to side outlet.
NOTE -- Measured with spool type 1.
540
360
180
(l/min)
(bar)
(psi)
0
10
20
30
40
0 90 180 270
Flow
Pressure drop
540
360
180
(l/min)
(bar)
(psi)
0
10
20
30
40
0 90 180 270
Flow
Pressure drop
540
360
180
(l/min)
(bar)
(psi)
A1
B1
P
T
A12
B12
A1
B1
P
T
A12
B12
A1
B1
P
T
A12
B12
1 section
4 sections
8 sections
12 sections
P→A
12
(B
12
)
P→A
1
(B
1
)
A
12
(B
12
)→T
A
1
(B
1
)→T
SD25
4 DBC005E
2 inlet cover and mid return manifold section
Intermediate pressure compensated flow divider section
2 parallel working sections
Hydraulic circuit
P
T
A1 B1 A2 B2
125
1800
Ex.: SD25/2/AC(XG--125)/18L/DFG/18L/RC
P
T
A1 B1 A2 B2
125
1800
Ex.: SD25/2/AC(XG--125)/18L/18L/RC
P
A1 B1
125
1800
T
P
125
1800
Ex.: SD25/2/AC(XG--125)/18L/CS1/18L/BC(XG--125)
B1 A1
SD25
5DBC005E
Working sections
Inlet cover
Hydraulic circuit
P
AC(XG--125)
TYPE CODE DESCRIPTION
AC(YG3) 617201101 Side inlet with direct pressure relief valve
AD(YG3) 617201102 Top inlet with direct pressure relief valve
AC(XG) 6172011 12 Side inlet with pilot operated pressure relief
valve
AC(SV) 617201109 Side inlet with relief valve blanking plug
125
1800
TYPE CODE DESCRIPTION
P--18L 617101001 Parallel
S--18L 61711 1001 Series
P
AD(YG3--125)
125
1800
P
AC(SV)
P
125
1800
AC(YG3--125)
AB
P--18L
AB
S--18L
SD25
6 DBC005E
Outlet cover
Intermediate sections
Hydraulic circuit
TYPE CODE DESCRIPTION
CS1 617401010 Mid return manifold section
DFG 617411020 Pressure compensated flow divider section
EI1(XG) 617421010 Secondary pilot operated pressure relief
valve
EI2(XG) 617421015 Mid inlet with secondary pilot operated
pressure relief valve
T
DFGCS1
TYPE CODE DESCRIPTION
RC 617300110 Side outlet
RD 617300120 Top outlet
RE 61730011 1 Top outlet with carry--over
RK 617300112 Top outlet with closed centre
RC
T
C
T
T
T
RD RE RK
NOTE -- Codes are referred to BSP thread.
EI1(XG--125)
P
EI2(XG--125)
125
1800
125
1800
SD25
7DBC005E
Assembling p arts
PART CODE DESCRIPTION
1. 5TIR1 12234 Tie rod kit for 1 section valve
5TIR1 12296 Tie rod kit for 2 sections valve
5TIR1 12358 Tie rod kit for 3 sections valve
5TIR1 12420 Tie rod kit for 4 sections valve
5TIR1 12482 Tie rod kit for 5 sections valve
5TIR1 12544 Tie rod kit for 6 sections valve
5TIR1 12606 Tie rod kit for 7 sections valve
5TIR1 12668 Tie rod kit for 8 sections valve
5TIR1 12730 Tie rod kit for 9 sections valve
5TIR1 12792 Tie rod kit for 10 sections valve
5TIR1 12854 Tie rod kit for 11 sections valve
5TIR1 12916 Tie rod kit for 12 sections valve
Tie rod tightening torque 50 Nm (36.88 lbft)
2. 5STA130270 Brakets kit
2.
1.
M12 not -- wrench 19
SD25
8 DBC005E
4. Inlet valves o p t ions
3. Inlet relief op t io ns
2. Inlet port selectio n *
1. Inlet cover body *
Inlet cover options
FE SD25 / A C ( XG -- 125) EL--12VDC *
TYPE CODE DESCRIPTION
VMP25/1 pilot operated pressure relief valve type X (standard)
(XG--125) X00821 1120 Range 25 to 315 bar / 360 to 4600 psi
standard setting 125 bar / 1800 psi
VMD25/1 direct pressure relief valve type Y
(YG3--125) XCAR125213 Range 125 to 220 bar / 1800to 2900 psi
standard setting 125 bar / 1800 psi
Standard setting is referred to 10 l/min flow.
SV 3XTAP536540 Relief valve blanking plug
CODE DESCRIPTION
5FIA125300 AC--AD type body
TYPE CODE DESCRIPTION
L 5CAR425300 Hydraulic pilot unloader valve (FC1.5)
EL YCAR425305 12 VDC electromagnetic controlled
unloader valve
YCAR425310 24 VDC electromagnetic controlled
unloader valve
SV 3XTAP536540 Relief valve blanking plug
NOTE (*) -- Items are referred to BSP thread.
1.
2.
3. 4.
CODE DESCRIPTION
3XTAP740210 G 1 plug (n.1 plug required)
3.
X
4.
Y
SV
1.
L
EL
SV
2.
Pressure relief valve setting in bar
Description example:
SD25
9DBC005E
SD25
10 DBC005E
3. “A” side spool positioners
2. Spool options
1. Working section kits *
Working section option s
1 mounted on A port.
2 mounted on B port.
3 mounted on A and B ports.
TYPE CODE DESCRIPTION
P 5EL1253000 Parallel
S 5EL2253000 Series
TYPE CODE CIRCUIT DESCRIPTION
1 3CU2710100 Double acting, 3 positions, with A and B
closed in neutral position
1A 3CU2721100 Double acting, 3 positions, with A open to tank
in neutral position
2 3CU2725100 Double acting, 3 positions, with A and B open
to tank in neutral position
3 3CU2731100 Single acting on A, 3 positions, B plugged;
requires G1 plug (see part I)
4 3CU2735100 Single acting on B, 3 positions, A plugged;
requires G1 plug (see part I)
3.
Include boby, seals, rings and load check valve.
1.
EL SD25 / P -- 1 8 L . P 1 (G3 -- 100) *
2. 3. 4. 5.
TYPE CODE DESCRIPTION
8 5V08120000 With spring return in neutral position
9B 5V09120000 With detent in position 1 and spring return in
neutral position
10B 5V09120000 With detent in position 2 and spring return in
neutral position
11 5V11120000 With detent in position 1, neutral and 2
11B 5V1 1220000 With detent in position 1 and 2, spring return
in neutral position
8P 5V08120701 Pneumatic kit
8EI3 5V08120350 12 VDC ON/OFF electro--hydraulic kit
5V08120351 24 VDC ON/OFF electro--hydraulic kit
8
9B--10B--11B
11
8P
8EI3
1.
NOTE (*) -- Items are referred to BSP thread.
Port relief valve setting in bar
I
Description example:
SD25
11DBC005E
Working section option s
II Optional handlevers
I Port plug *
5. Port relief options
4. “B” side options
TYPE CODE DESCRIPTION
L 5LEV120000 Standard lever
SLP 5COP120000 Without lever, with dust proof plate
TQ 5TEL120100 CD cable connection
TP 5TEL120005 CG cable connection
LCB 5CLO225000 Mechanical joystick
TYPE CODE DESCRIPTION
G1 3XTAP740210 Plug for single acting spool
TYPE CODE DESCRIPTION
AL01/M12x200 170013020 For L lever box L= 200mm/7.87in
AL08/M12x250 170013125 For LCB joystick L= 250mm/9.84in
TYPE CODE DESCRIPTION
Anti--shock valve
P(G2--63) XCAR216115 Range 63 to 125 bar / from 900 to 1800 psi
standard setting 63 bar / 900 psi
P(G3--100) XCAR2161 16 Range 100 to 250 bar / from 1450 to 3600 psi
standard setting 100 bar / 1450 psi
P(G4--200) XCAR2161 17 Range 200 to 315 bar / from 2900 to 4600 psi
standard setting 200 bar / 290 psi
Anti--shock and anti--cavitation valve
U(G2--63) XCAR316112 Range 63 to 125 bar / from 900 to 1800 psi
standard setting 63 bar / 900 psi
U(G3--100) XCAR316113 Range 100 to 250 bar / from 1450 to 3600 psi
standard setting 100 bar / 1450 psi
U(G4--200) XCAR316114 Range 200 to 315 bar / from 2900 to 4600 psi
standard setting 200 bar / 290 psi
Standard setting is referred to 10 l/min flow.
C 3XCAR416100 Anti--cavitation
P3T 3XTAP528360 A and B ports valve blanking plugs
5.
P
U
C
P3T
4.
2.
L
SLP
TQ
LCB
TP
II
II
For special c onfigurations see pages 13 and 14
“A” side spool positioners
Spools options
201
AB
P
T
4
“A” port plugged
201
B
P
T
1A11B
201
2
AB
P
T
3
201
A
P
T
“B” port plugged
201
V1 V2
201
201
201
201
8
9B
10B
11
8P
ON/OFF pneumatic kit
201
VL
8EI3
ON/OFF electro--hydraulic kit
Connection ISO4400
Operating features
Nominal voltage : 12 VDC / 24 VDC
Power rating : 21 W..
Duty cycle : 100%....
Pilot pressure : from 10 to 50 bar.
from 145 to 725 psi
Optional connector
code: 2X1001010
01
15
20
16
201
11B
201
AB
P
T
201
AB
P
T
Operating features
Pilot pressure : min 6 max 10 bar
min 87 max 145 psi
61
2.40
NPT1/2--27
V1
V2
57
2.24
97
3.82
170.5
6.71
169
6.65
176
6.93
V
L
Feeder kit
(see page 13)
SD25
12 DBC005E
Hydraulic spool control
Special configurations
Electro--hydraulic feeder kit
PART TYPE CODE DESCRIPTION
1. KE1R3 5KE1R31730 kit for 1 section
KE2R3 5KE2R31730 kit for 2 sections
KE3R3 5KE3R31730 kit for 3 sections
KE4R3 5KE4R31730 kit for 4 sections
KE5R3 5KE5R31730 kit for 5 sections
KE6R3 5KE6R31730 kit for 6 sections
2. VRE 3XGIU650740 G 1--1/4 back--pressure valve
(carry--over configuration)
3. 4RON442934 G 1--1/4 washer
4. RE 4TAP426612 G 3/4 plug
Operating features
Adjustment range : from 5.8 to 19 bar / 84 to 276 psi -- diagram 024
Max.pilot pressure : 100 bar / 1450 psi
NOTE -- Codes are referred to BSP thread.
4.
2.
1.
3.
201
AB
P
T
VA VB
1IM8IM
G1/4
AB
VA VB
Ex.: EL SD25/P--1IM 8IM
83
3.27
384
15.12
Spool
code 3CU2710420
Spool control kit
code 5IDR225000
Working section kit
code 5EL125300B (standard body)
71
2.80
SD25
13DBC005E
Regenerative circuit
4
th
position floating circuit
Special configuration
8P8CR
Spool in regenerative
201
AB
PT
Ex.: EL SD25/P--8P 8CR...
2013
AB
P
T
Ex.: EL SD25/P--513...
A
513
4th position
spool in floating
8F8CR
Spool out regenerative
201
AB
PT
Ex.: EL SD25/P--8F 8CR...
97
3.82
61
2.40
61
2.40
A
A
Spool
code 3CU2741100
Spool control kit
code 5V13025000
Spool
code 3CU2761100
Spool control kit
code 5V08120020
Spool
code 3CU2761200
Spool control kit
code 5V08120020
Working section kit
code 5EL1253200 (specialbody)
Working section kit
code 5EL1253400 (specialbody)
Working section kit
code 5EL1253000 (standard body)
SD25
14 DBC005E
2. Tie rod kits for SD16
3. Intermediate sections *
1. Tie rod kits for SD25
CS3
Intermediate sections
Mid return manifold.
To assemble different sizes of valve. Tie rods are special. Available combination SD25 / SD16.
P1
T
A1 B1 A2 B2
125
1800
Description example: SD25/1/AC(XG--125)/18L/CS3/18L/BC(YG3--175)/SD16/1
P2
175
2500
294
11.58
343.5
13.52
100
3.94
50
1.97
17.5
0.69
88.5
3.48
102.5
4.04
135
5.31
356
14.02
26
1.02
38
1.50
48
1.89
12
0.47
42
1.65
50
1.97
21
0.83
282
11.10
84
3.31
62
2.44
G1--1/2
3.
1.
2.
CODE DESCRIPTION
5TIR4251 Kit for 1 section
5TIR4252 Kit for 2 sections
5TIR4253 Kit for 3 sections
5TIR4254 Kit for 4 sections
CODE DESCRIPTION
5TIR4161 Kit for 1 section
5TIR4162 Kit for 2 sections
5TIR4163 Kit for 3 sections
5TIR4164 Kit for 4 sections
CODE DESCRIPTION
617441010 Mid return manifold section
SD25 inlet cover and
working section
SD16 inlet cover and
working section
NOTE (*) -- Code are referred to BSP thread.
SD25
15DBC005E
Circuit optionOutlet section parts
Outlet cover op t io ns
FS SD25 / RC *
PART CODE QTY DESCRIPTION
1. 3FIA225300 1 Outlet section body *
2. 3XTAP750240 1 G 1--1/4 plug *
NOTE (*) -- Items are referred to BSP thread.
PART CODE QTY DESCRIPTION
3. 4TAP426612 1 G 3/4 plug for
carry--over (RE) and
closed centre (RK) configuration
1.
2.
RE--RK option
3.
Example:
SD25
16 DBC005E
SD25
17DBC005E
Fitting tightening torque -- Nm / lbft
THREAD TYPE P and C ports A and B ports T port
BSP (ISO 228/1) G1 G1 G1--1/4
With O--Ring seal 100 / 73.7 100 / 73.7 190 / 140.2
With copper washer 90 / 66.3 90 / 66.3 150 / 110.6
With steel and rubber washer 100 / 73.7 100 / 73.7 190 / 140.2
UN--UNF (ISO 11926--1) 1 5/8--12 UN--2B (SAE 20) 15/16--12UN--2B(SAE16) 1 5/8--12 UN--2B (SAE 20)
With O--Ring seal 200 / 147.5 150 / 110.6 200 / 147.5
Installation and maintenance
The SD25 valve is assembled and tested as per the technical specification of this catalogue.
Before the final installation on your equipment, follow the below recommendations:
-- the valve can be assembled in any position, in order to prevent working sections deformation and spools sticking mount the
product on a flat surface;
-- in orderto preventthe possibility ofwaterentering the leverbox and spoolcontrolkit,donot usehigh pressurewash downdirectly
on the valve;
-- prior to painting, ensure plastic port plugs are tightly in place.
Carry--over configuration
P
C
A1
A2
B2
B1
T
NOTE -- These torque are recommended. Assembly tightening torque depends on many factors, including lubrication, coating and
surface finish. The manufacturer shall be consulted.
SD25
18 DBC005E
Notes
The SD25 valve can be supplied with one coat of opaque black paint (CVN configuration).
Example of specification: SD25/2/AC(XG--125)/18L/18L/RC--<CVN>
NOTE -- For different color consult Sales Dept.
SD25
19DBC005E
WALVOIL S.P.A.
42100 REGGIO EMILIA • ITALY • VIA ADIGE, 13/D
TEL. +39.0522.932411 • FAX +39.0522.300984
E--MAIL: INFO@W ALVOIL.COM • HTTP: //WWW.WALVOIL.COM
SALES DEPARTMENT
TEL. +39.0522.932555 • FAX +39.0522.932455
DBC005E
