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Parker RAH081S20 - 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. RAH081S20

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Products specifications

Attribute name	Attribute value
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	-35 °F	Maximum Operating Pressure	350 bar
Configuration	Pressure Relief	Actuation Type	Pressure Sensing
Cavity Size	C08-2	Operation Type	Automatic
Adjustment Mechanism	Screw	Function	Pilot Operated
Maximum Tank Pressure	350 bar	Maximum Inlet Pressure Rating	350 bar
Weight	0.2 lb	Seal Material	D-Ring (Standard)
Maximum Flow Rate	20 Gal/min	For Fluid Type	Mineral-based or synthetic hydraulic fluids
Valve Material	All parts steel. All operating parts hardened steel	Filter Efficiency Rating	ISO 4406 18/16/13, SAE Class 4
Mounting Type	Screw in cartridge valve	Operating Temperature	-37 to +93 °C
Maximum Operating Temperature	+93 °C	Installation Torque	32-36 lb-ft
Standard Setting Pressure	1000 psi	Maximum Pressure Setting	2000 psi
Pressure Control Sensitivity	570 per turn psi	Pressure Control Range	6.9-138 bar
Reseat Pressure	90% of pressure setting	Flow Rate	75.8 L/min
Leak Rate	5 per @ 100 psi (6.8 bar) setting cm3/min	Adjustment Mechanism	Screw
Maximum Inlet Pressure Rating	5000 PSI, 350 BAR	Seal Material	D-Ring (Standard)
Pressure Control Range	100-2000 PSI, 6.9-138 BAR	Flow Rate	20 GAL/MIN, 75.8 L/MIN

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