Pilot Operated Pressure Reducing Valve
Series R4R
4-95
R4R UK.INDD RH 06.09.2011
Catalogue HY11-3500/UK
Parker Hannifin Corporation
Hydraulics Group
4
Characteristics / Technical Data
Subplate mounted pressure reducing valves series R4R
are used to control the pressure in the secondary part of
the hydraulic system. Independent of the primary pres-
sure the secondary pressure is reduced to the pressure
setting. In order to avoid undesired motion the valves are
normally closed.
Features
• Pilot operated with manual adjustment
• Subplate mounting acc. to ISO 5781
• Normally closed to avoid unintended motion
• 3 pressure stages
• 3 adjustment modes
- hand knob
- acorn nut with lead seal
- Key lock
General
Nominal size 10 25 32
Interface Subplate mounting acc. ISO 5781
Mounting position as desired, horizontal mounting prefered
Ambient temperature [°C] -20...+80
MTTF
D
value [years] 75
Weight [kg] 4.8 7.2 13.5
Hydraulic
Max. operating pressure [bar] Ports A, B and X 350, port Y depressurized
Pressure stages [bar] 105, 210, 350
Nominal flow [l/min] 150 350 500
Fluid Hydraulic oil according to DIN 51524 ... 51525
Viscosity, recommended [cSt] /
permitted [cSt] /
[mm²/s]
[mm²/s]
30 ... 50
20 ... 380
Fluid temperature [°C] -20 ... +70
Filtration ISO 4406 (1999) 18/16/13 (acc. NAS 1638:7)
Technical data
Pilot Operated Pressure Reducing Valve
Series R4R
4-96
R4R UK.INDD RH 06.09.2011
Catalogue HY11-3500/UK
Parker Hannifin Corporation
Hydraulics Group
4
Ordering Code
Pilot
ports
G1/4“
Max.
pressure
(350 bar)
Pressure
valve
Pilot oil Design
series
SealsInterface Adjust-
ment
Reducing
function
Nominal
size
Pressure
stages
Modifi-
cations
Pilot oil
Code Pilot Drain
1 Internal External from Y
2 Internal External from Y1
1)
Other pressure stages
on request.
R 4 R 5 9 B
Code Pressure stages
1)
1 up to 105 bar
3 up to 210 bar
5 up to 350 bar
Code Interface
4
Subplate
mounting
ISO 5781
Code Seals
1 NBR
5 FPM
Code Nominal size
03 NG10
06 NG25
10 NG32
Code Adjustment
1
Hand knob 32mm dia.
(Standard)
3 Acorn nut with lead seal
4 key lock
Pilot Operated Pressure Reducing Valve
Series R4R
4-97
R4R UK.INDD RH 06.09.2011
Catalogue HY11-3500/UK
Parker Hannifin Corporation
Hydraulics Group
4
Characteristic Curves
Reduced pressure pA versus flow Q
R4R03
1)
Reduced pressure pA versus flow Q
R4R06
1)
Reduced pressure pA versus flow Q
R4R10
1)
Minimum pressure curve
1)
Measured at 350 bar primary pressure pB.
Minimum pressure curve
Minimum pressure curve
All characteristic curves measured with HLP46 bei 50°C.
Pilot Operated Pressure Reducing Valve
Series R4R
4-98
R4R UK.INDD RH 06.09.2011
Catalogue HY11-3500/UK
Parker Hannifin Corporation
Hydraulics Group
4
Ød6
Ød5
H2
L7
H1
H3
L3
L4
Y1Y1
X1
L6
Acorn nut
with lead seal
Hand knob
X7
Ød3xt3
Ød1
Y4
Y3
X2
X3
X4
X5
Ød2
X1
d4xt4
Y1
A B
Y
L1
L5
L2
30
B2
B1
Y1
X1
Key lock
Dimensions
NG ISO-code x1 x2 x3 x4 x5 x6 x7 y1 y2 y3 y4 y5 y6
10 5781-06-07-0-00 42.9 35.8 21.5 – 7.2 – 31.8 66.7 – 33.4 7.9 – –
25 5781-08-10-0-00 60.3 49.2 39.7 – 11.1 – 44.5 79.4 – 39.7 6.4 – –
32 5781-10-13-0-00 84.2 67.5 59.5 42.1 16.7 – 62.7 96.8 – 48.4 3.8 – –
Tolerance for all dimensions ±0.2
NG ISO-code B1 B2 H1 H2 H3 H4 H5 H6 L1 L2 L3 L4 L5 L6 L7
10 5781-06-07-0-00 87.3 33.35 83 21 62.5 – – – 29 94.8 60.8 143 181 144.8 38.6
25 5781-08-10-0-00 105 39.7 109.5 29 89 – – – 34.7 126.8 60.8 143 181 144.8 38.6
32 5781-10-13-0-00 120 48.4 120 29 99.5 – – – 30.6 144.3 60.8 143 181 144.8 38.6
NG ISO-code d1max d2max d3 t3 d4 t4 d5 d6 Subplate
1)
10 5781-06-07-0-00 15 7 7.1 8 M10 16 10.8 17 SPP 3M6B 910
25 5781-08-10-0-00 23.4 7.1 7.1 8 M10 18 10.8 17 SPP 6M8B 910
32 5781-10-13-0-00 32 7.1 7.1 8 M10 20 10.8 17 SPP 10M12B 910
1)
Details see chapter 12, series SPP
X1: G 1/4“
Y1: G 1/4“
NG ISO-code Bolt kit Surface finish
NBR FPM
10 5781-06-07-0-00 BK 505 4x M10 x 35 DIN 912 12.9 63 Nm ±15% S26-58507-0 S26-58507-5
25 5781-08-10-0-00 BK 485 4x M10 x 45 DIN 912 12.9 63 Nm ±15% S26-58475-0 S26-58475-5
32 5781-10-13-0-00 BK 506 6x M10 x 45 DIN 912 12.9 63 Nm ±15% S26-58508-0 S26-58508-5