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RA 26 915/06.98
*
3DR 10 P –6X Y 00
Contents
Description Page
Features 1
Ordering details 1
Functional description, section, symbol 2
Technical data 3
Characteristic curves 3, 4
Unit dimensions 5
RA 26 915/06.98
Pressure reducing valve,
pilot operated,
Model 3DR
Nominal size 10
Series 6X
Maximum operating pressure 4500 PSI (315 bar)
Maximum flow 31.7 GPM (120 L/min)
Model 3DR 10 P5-6X/315Y/00M
H/A/D 5845/97
Features
– Valve for the reduction (P to A) and limitation
(A to T) of pressure in a hydraulic system
– For subplate mounting,
porting pattern to ISO 4401-5, NFPA T 3.5.1 M R1, and
ANSI B 93.7 D 05
Subplates, see datasheet RA 45 054 (separate order)
– 4 pressure stages
– 4 adjustment elements:
• Handknob
• Screw adjustment with locknut and protective cap
• Lockable handknob with scale
• Handknob with scale
3-way pressure reducing valve
Size 10, NFPA D05 = 10
Subplate mounting = P
Adjustment element
Handknob = 4
Screw adjustment with locknut and protective cap = 5
Lockable handknob with scale = 6
1)
Handknob with scale = 7
Series 60 to 69 = 6X
(60 to 69: externally interchangeable)
Maximum adj. pressure up to 725 PSI (50 bar) = 50
Maximum adj. pressure up to 1450 PSI (100 bar) = 100
Maximum adj. pressure up to 2901 PSI (200 bar) = 200
Maximum adj. pressure up to 4569 PSI (315 bar) = 315
Further details in clear text
M = NBR seals
V = FPM seals
(other seals on request)
Attention!
The compatibility of the seals and
pressure fluid has to be taken into account!
00 = without stroke limiter
Pilot oil supply
Y = internal pilot,
external drain
1)
H-key with part no. 00008158
is included within the scope of supply
Ordering details
RA 26 915/06.98
Rexroth Hydraulics 2/6 3DR
Symbol
1
5
7 11 12
3
10
9
6 8213 4
T
APB
X
Y
14
P
A
Y
T
M
Functional description, section, symbol
Valve model 3DR is a pilot operated 3-way pressure reducing valve with
pressure limitation in the secondary circuit. It is used to reduce pressure
in a hydraulic system.
The pressure reducing valve consists of main valve (1), control spool (2)
and pilot control valve (3) with adjustment element (10).
At rest the valve is open. Flow is unrestricted from port P to port A. The
pressure in port A is permitted via the channel (4) to the spool area
opposite to compression spring (9). Pressure is applied via orifice (6) to
the spring loaded side of the control spool (2) and via channel (5) to
ball (7) in pilot control valve (3).
Dependent on the setting of compression spring (11), pressure builds
in front of ball (7) and in channel (5) which holds control spool (2) in an
open position. Flow continues from port P via control spool (2) into port
A, until pressure in port A exceeds the value set at compression spring
(11) and lifts ball (7).
Control spool (2) moves closed. The required reduced pressure is achieved
when a balance between the pressure in port A and the value set at
compression spring (11) is reached.
If pressure in port A continues to rise at the actuator through external
forces, control spool (2) moves further against compression spring (9).
Port A is connected to port T via control lands (8) at control spool (2).
Fluid passes to tank to ensure that pressure does not rise further.
Pilot oil return from spring chamber (12) is always external via control
line (13) to port Y. This must always remain at zero pressure to tank.
Pressure gauge connection (14) makes it possible to monitor the reduced
pressure in port A.
Model 3DR 10 P4–6X/…
3DR 3/6 Rexroth Hydraulics
RA 26 915/06.98
(50)
(100)
(150)
(200)
(250)
(300)
(350)
0 (40) (80) (120)(120) (40)(80)
725
1450
2175
2900
3625
4350
5075
0 10.6 21.1 31.731.7 10.621.1
Characteristic curves measured at
ν
= 190 SUS (41 mm
2
/s) and
t
= 122 °F (50 °C)
Technical data (for applications outside these parameters, please consult us!)
1)
suitable for NBR and FPM seals
2)
only suitable for FPM seals
The characteristic
curves are valid for
output pressure
p
T
= zero over the
entire flow range.
Output pressure in PSI (bar) →
Output pressure p
A
in relationship to the flow q
V
Flow in GPM (L/min) →
P to A
A to T
General
Description pressure reducing valve
Graphic symbol see page 2
Model code see page 1
Mounting style subplate mounting
Connection model indirect connection via subplate or manifold block,
Mounts on standard ISO 4401-5, NFPA T 3.5.1 M R1,
and ANSI B 93.7 D 05
Nominal size 10
Weight lbs (kg) 13.22 (6.0)
Installation optional
Direction of flow see graphic symbol on page 2
Ambient temperature range °F (°C) –22 to +122 (–30 to +50)
Hydraulic data
Nominal pressure PSI (bar) 4500 (315)
Maximum operating pressure at ports P and A PSI (bar) 4500 (315)
Maximum operating pressure at port Y PSI (bar) separate and at zero pressure to tank
Setable pressure minimum PSI (bar) dependent on the flow (see characteristic curves on page 4)
maximum PSI (bar) 725 (50); 1450 (100); 2901 (200); 4569 (315)
Pressure fluid mineral oil (HL, HLP) to DIN 51 524
1)
;
fast bio-degradable pressure fluids to
VDMA 24 568 (also see RA 90 221); HETG (rape seed oil)
1)
;
HEPG (polyglycol)
2)
; HEES (synthetic ester)
2)
;
other pressure fluids on request
Pressure fluid temperature range °F (°C) –22 to +176 (–30 to +80) with NBR seals
°F (°C) –4 to +176 (–20 to +80) with FPM seals
Viscosity range SUS (mm
2
/s) 45 to 3720 (10 to 800)
Maximum flow GPM (L/min) 31.7 (120)
Degree of contamination maximum permissible degree of contamination of the pressure
fluid is to NAS 1638 class 9. We, therefore, recommend a filter
with a minimum retention rate of ß
10
≥ 75.
RA 26 915/06.98
Rexroth Hydraulics 4/6 3DR
(2)
(4)
(6)
(8)
(10)
(12)
(14)
0 (40) (80) (120)(120) (40)(80)
0 10.6 21.1 31.731.7 10.621.1
29
58
87
116
145
174
203
(5)
(10)
(15)
0 (40) (80)
(60)(20)(20)(40)(60)(80)
0 10.6 21.215.85.35.310.615.821.2
72.5
145
218
(0.2)
(0.4)
(0.6)
(0.8)
(1.0)
(1.2)
(1.4)
0 (40) (80) (120)(120) (40)(80)
0 10.6 21.1 31.731.7 10.621.1
0.053
0.106
0.159
0.211
0.264
0.317
0.37
Pressure in port A in PSI (bar) →
Flow resistance (∆
p
through housing)
Flow in GPM (L/min) →
P to AA to T
The characteristic curves are valid for output pressure p
T
= zero over the entire flow range.
Pressure in port A in PSI (bar) →
Minimum setable pressure p
min
in relationship to the flow q
V
Flow in GPM (L/min) →
P to AA to T
Input pressure
at actuator A is
dependent on
the system
Pilot flow in port Y in GPM (L/min)
→
Pilot flow q
V St
in relationship to the flow q
V
Flow in GPM (L/min) →
P to AA to T
p
A
= 300 bar
p
A
= 50 bar
∆p
= 300 bar
∆p
= 50 bar
Characteristic curves measured at
ν
= 190 SUS (41 mm
2
/s) and
t
= 122 °F (50 °C)
3DR 5/6 Rexroth Hydraulics
RA 26 915/06.98
Ø 1.38 (35)
Ø 1.26 (32)
2.126 (54)
2.874 (73)
0.532 (13.5)
1.81 (46)
1.063 (27)
4.252 (108)
==
2.756 (70)
1.004 (25.5)
4.13 (105)
1.22 (31)
~ 7.01 (178)
T
BA
T
P
3
82901
Ø 1.56 (39.5)
Ø 0.433 (11)
Ø 0.26 (6.6)
P
T
X
A
B
Y
T
~ 7.48 (190)
~ 8.35 (212)
0.709 (18)
2 4 5 6 7; 8
3
1
910
11 14 12
1.38 (35)
3.39 (86)
5.12 (130)
13
1.81 (46)
2.126 (54)
1.22 (31)
0.0004/4.0 in
0.01/100 mm
32
(R
max
4)
1 Name plate
2 Pilot control valve
3 Main valve
4 Adjustment element “5”
5 Hexagon A/F 10
6 Adjustment element “4”
7 Adjustment element “6”
8 Adjustment element “7”
9 O-rings 0.426 x 0.07 (10.82 x 1.78)
for ports X and Y
10 O-rings 0.472 x 0.079 (12 x 2)
for ports A, B, P and T
11 Port X has to be plugged
in the subplate.
12 Port B has to be plugged
in the subplate.
Unit dimensions: dimensions in inches (millimeters)
13 Pressure gauge connection
14 Valve mounting surface,
porting pattern to ISO 4401-5, NFPA T 3.5.1
M R1, and ANSI B 93.7 D 05
Subplates
G535/01 (G 3/4),
G535/12 (SAE 12; 1-1/16-12)
G536/01 (G 1),
G536/12 (SAE 16; 1-5/16-12)
see RA 45 054 , must be ordered separately.
Valve mounting bolts
4) 1/4“-20 x 1-3/4“ UNC
4) M6 x 451 DIN 912-10.9,
M
A
= 11.4 lb-ft (15.5 Nm),
must be ordered separately.
Required surface finish of
interface when mounting
without our subplate
Mannesmann Rexroth Corporation
Rexroth Hydraulics Div., Industrial,
2315 City Line Road, Bethlehem, PA 18017-2131 Tel. (610) 694-8300 Fax: (610) 694-8467
Rexroth Hydraulics Div., Mobile,
1700 Old Mansfield Road, Wooster, OH 44691-0394 Tel. (330) 263-3400 Fax: (330) 263-3333
All rights reserved – Subject to revision
Printed in U.S.A.
3DR 6/6
RA 26 915/06.98
Notes