Parker Hanniļ¬n Corporation
Hydraulics Group
Catalogue HY11-3500/UK
7
7-13
RM UK.INDD CM 27.04.15
Pilot Operated Pressure Relief Valve
Series RMCharacteristics / Technical Data
The pilot operated pressure relief valves from the Parker
Manapak series RM are in sandwich design for easy
configuration of stack systems. Depending on type,
pressure limiting can be achieved in ports P, A or B with
unloading to port T.
RM valves may only be mounted in the deļ¬ned mounting
position.
Features
ā€¢ī€€ The valve bodies of the Parker Manapak valve series
RM are made of steel.
ā€¢ī€€ The pressure can be set by hexagon socket screw
(RM4), hexagon socket screw or knob with cylinder lock
(RM6).Piloting results in a ļ¬‚at p/Q performance curve.
ā€¢ī€€ Piloting results in a ļ¬‚at p/Q performance curve.
ā€¢ī€€ The oriļ¬ces located in the main spool limit the pilot oil
ļ¬‚ow.
Technical data
Schematics
RM4-NG16
RM6-NG25
(only PT)
General
Design Pilot operated pressure relief valve
Actuation hydraulic
Size
NG16 NG25
Mounting interface ISO 4401
Mounting position unrestricted
Ambient temperature [Ā°C] -20...+60
MTTF
D
value [years] 150
Weight [kg] 4.9 5.9
Hydraulic
Max. operating pressure [bar] 350
Fluid Hydraulic oil according to DIN 51524
Fluid temperature [Ā°C] -20...+70
Viscosity, permitted
recommended
[cSt] / [mm
2
/s]
[cSt] / [mm
2
/s]
20 ... 400
30 ... 80
Filtration ISO 4406 (1999); 18/16/13
RM6
RM6
Parker Hanniļ¬n Corporation
Hydraulics Group
Catalogue HY11-3500/UK
7
7-14
RM UK.INDD CM 27.04.15
Pilot Operated Pressure Relief Valve
Series RM
Ordering Code
Connection Pressure
range
Adjustment
hexagon
socket
Pressure
relief valve
NG16
Seal
FPM
Design
series
Code Connection
PT P to T
AT A to T
BT B to T
Code Pressure range
07 5 to 65 bar
25 10 to 250 bar
35 10 to 350 bar
Connection
P to T
Pressure
range
AdjustmentPressure
relief valve
NG25
Seal
FPM
Design
series
(not required
for ordering)
Code Pressure range
07 5 to 70 bar
17 10 to 175 bar
25 10 to 250 bar
35 10 to 350 bar
Code Adjustment
S Hexagon socket
L Cylinder lock
RM4
RM6
V
V
S
PT
HT
Parker Hanniļ¬n Corporation
Hydraulics Group
Catalogue HY11-3500/UK
7
7-15
RM UK.INDD CM 27.04.15
Pilot Operated Pressure Relief Valve
Series RM
Performance Curves
p/Q performance curves
RM4
RM6
All characteristic curves measured with HLP46 at 50 Ā°C.
0
300
2001000
150
200
250
350
400
35 spring
07 spring
Min.
setting
Flow [l/min]
Pressure [bar]
25 spring
100
50
300
200100
30
10
20
0
0 300
Flow [l/min]
Pressure differential ī€Ÿp [bar]
Parker Hanniļ¬n Corporation
Hydraulics Group
Catalogue HY11-3500/UK
7
7-16
RM UK.INDD CM 27.04.15
Pilot Operated Pressure Relief Valve
Series RM
Dimensions
RM4
Adjustment code S
Seal kit RM4
Seal Order code
V SK-RM4-V-HT
Parker Hanniļ¬n Corporation
Hydraulics Group
Catalogue HY11-3500/UK
7
7-17
RM UK.INDD CM 27.04.15
Pilot Operated Pressure Relief Valve
Series RM
Dimensions
RM6
Adjustment Code S
Adjustment Code L
Seal kit RM6
Seal Order code
V SK-RM6-V-11