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