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Parker RAH121K50 - Pilot Operated Relief Valves

Parker’s pilot operated relief valves are designed for continuous duty applications featuring great stability with low pressure drop; working with pressures up to 420 bar (6000 psi) and flows up to 400 lpm (106 gpm).

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Brand Parker

Part No. RAH121K50

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Products specifications

Attribute name	Attribute value
Seal Material	Nitrile	Body Material	n/a
Division	Hydraulic Cartridge Systems Division	Division	Hydraulic Systems Division
Maximum Kinematic Viscosity	45-2000 SSU (6 to 420 cSt)	Minimum Operating Temperature	-30 °F
Flow Rate	50 Gal/min	Maximum Flow Rate	50 Gal/min
Maximum Operating Pressure	350 bar	Configuration	Pressure Relief
Actuation Type	Pressure Sensing	Operation Type	Automatic
Adjustment Mechanism	Knob	Function	Pilot Operated
Maximum Tank Pressure	5000 psi	Maximum Pressure Setting	5000 psi
Cavity Size	C12-2	Maximum Inlet Pressure Rating	5500 psi
Maximum Operating Temperature	+121 °C	For Fluid Type	Mineral-based or synthetic hydraulic fluids
Valve Material	All parts steel. All operating parts hardened steel	Operating Temperature	-34 to +121 °C
Filter Efficiency Rating	ISO 4406 18/16/13, SAE Class 4	Mounting Type	Screw in cartridge valve
Weight	0.48 lb	Standard Setting Pressure	2500 psi
Pressure Control Range	500-5000 psi	Pressure Control Sensitivity	1711 per turn psi
Reseat Pressure	80% of pressure setting	Leak Rate	82 @ 75% Crack Pressure cm3/min
Installation Torque	124-130 Nm	Seal Material	Nitrile
Adjustment Mechanism	Knob	Maximum Inlet Pressure Rating	5500 PSI, 380 BAR
Pressure Control Range	500-5000 PSI, 34.5-350 BAR	Flow Rate	50 GAL/MIN, 189.5 L/MIN

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