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Parker RDH081S20 - Direct Acting Relief Valves

Parker’s direct acting relief valves are available in several cavity sizes and are designed for continuous duty applications with pressures up to 420 bar (6000 psi) and flows up to 200 lpm (53 gpm).

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Brand Parker

Part No. RDH081S20

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Products specifications

Attribute name	Attribute value
Body Material	n/a	Division	Hydraulic Systems Division
Maximum Kinematic Viscosity	45-2000 SSU (6 to 420 cSt)	Minimum Operating Temperature	-35 °F
Maximum Operating Temperature	+200 °F	Weight	0.09 kg
Function	Direct Acting	Configuration	Pressure Relief
Actuation Type	Pressure Sensing	Cavity Size	C08-2
Operation Type	Automatic	Adjustment Mechanism	Screw
Wire Mesh Screen Included	n/a	Maximum Tank Pressure	350 bar
Seal Material	D-Ring (Standard)	Maximum Inlet Pressure Rating	380 bar
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	-35 to +200 °F	Installation Torque	32-36 lb-ft
Maximum Operating Pressure	380 bar	Flow Rate	1.9 L/min
Maximum Flow Rate	0.5 Gal/min	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
Leak Rate	0.33 @ 75% Crack Pressure cm3/min	Adjustment Mechanism	Screw
Seal Material	D-Ring (Standard)	Maximum Inlet Pressure Rating	5500 PSI, 380 BAR
Pressure Control Range	100-2000 PSI, 6.9-138 BAR	Flow Rate	0.5 GAL/MIN, 1.9 L/MIN

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