Characteristics Pilot-Operated Relief alve The pilot-operated pressure relief valves from the Parker Manapak series RM are sandwich plate valves designed for stacking beneath a directional valve with a standardised mounting pattern. Depending on type, pressure limiting can be achieved in ports P, A, or B with unloading always taking place at T. RM valves may only be mounted in the defined mounting position. Features The valve bodies of the Parker Manapak valve series RM are made of steel. The pressure can be set by slotted head screw, knob, or knob with lock. Piloting results in a flat p/q performance curve which is essentially only influenced by Q-dependent flow resistance. The orifices located in the main spool limit the pilot oil flow. Technical data General pressure relief sandwich valve Actuation hydraulic Size NG10 NG16 NG25 Mounting interface ISO 4401 : 1994 Mounting position any Ambient temperature [ C] -40...+60 Weight [kg] 3. 4.9 5.9 Hydraulic Max. operating pressue [bar] 350 Fluid hydraulic oil to ISO Fluid temperature [ C] -20...+60 iscosity recommended [mm 2 /s] 30...80 permitted 20...380 Filtration ISO 4406 : 1999; 18/16/13 Schematics RM3 RM4 RM6 -
Ordering RM3 Pilot-Operated Relief alve relief valve NG10 range FPM series PT AT BT P to T A to T B to T HT series Specification only for RM3 AT 0 1) 1 21 25 32 35 range 4 to 0 bar 10 to 15 bar 10 to 210 bar 10 to 250 bar 10 to 315 bar 10 to 350 bar Type PT AT BT S L K Slotted head screw with lock nut with E10 lock 1) Type AT = 5-65 bar RM4 PT HT relief valve NG16 P to T range FPM series 0 21 35 range 5 to 65 bar 10 to 210 bar 10 to 350 bar S L K Slotted head screw with lock nut with E10 lock RM6 PT HT relief valve NG25 P to T range FPM series 0 1 25 35 range 5 to 0 bar 10 to 15 bar 10 to 250 bar 10 to 350 bar S L Slotted head screw with lock nut with E10 lock -8
Performance Curves Pilot-Operated Relief alve RM3 curve 35 spring [bar] 25 spring 1 spring 0 spring Min. setting differential p [bar] in P, A or B RM4 curve 35 spring [bar] 21 spring 0 spring Min. setting differential p [bar] in P RM6 curve 35 spring 25 spring [bar] 1 spring 0 spring Min. setting differential p [bar] in P -9
Dimensions Pilot-Operated Relief alve RM3 L max. 239 S max. 15 26 194 alve side kit RM3 Order code SK-RM3--11 K The O-rings for sealing the connecting surface of the manifold side are included. The O-rings and the positioning pins are always mounted on the manifold side. RM3 AT*HT L 26 max. 2199 14 S max. 15 alve side 50 48. 25. Manifold side K 31 max. 151 12 0 50 22 max. 180 Manifold side 12 2 0 24.5 The seal plate and the O-rings for sealing the connecting surface of the manifold side are included with the HT model. -10
Dimensions Pilot-Operated Relief alve RM4 K 80 Ø 2 53 max. 106.5 32 max. 95 10 max. 265 S 10 Ø 49.5 90 55 101.6 The O-rings for sealing the connecting surface of the manifold side are included. The O-rings and the positioning pins are always mounted on the manifold side. kit RM4 Order code SK-RM4--10-11
Dimensions Pilot-Operated Relief alve RM6 S max. 223 alve side L 40 0 Manifold side 6 184 max. 24 11.1 11 114.3 The O-rings for sealing the connecting surface of the manifold side are included. The O-rings and the positioning pins are always mounted on the manifold side. kit RM6 Order code SK-RM6--11-12