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Parker RDH042S30 - 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. RDH042S30

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Products specifications

Attribute name	Attribute value
Seal Material	Nitrile	Weight	0.03 kg
Body Material	n/a	Division	Hydraulic Systems Division
Maximum Kinematic Viscosity	45-2000 SSU (6 to 420 cSt)	Minimum Operating Temperature	-30 °F
Function	Direct Acting	Configuration	Pressure Relief
Actuation Type	Pressure Sensing	Maximum Pressure Setting	3000 psi
Operation Type	Automatic	Adjustment Mechanism	Screw
Wire Mesh Screen Included	n/a	Maximum Tank Pressure	350 bar
Cavity Size	C04-2	Maximum Flow Rate	1 Gal/min
Maximum Inlet Pressure Rating	380 bar	Flow Rate	3.8 L/min
Installation Torque	7 lb-ft	Maximum Operating Temperature	+250 °F
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	Maximum Operating Pressure	380 bar
Standard Setting Pressure	1500 psi	Reseat Pressure	80% of pressure setting
Leak Rate	0.66 @ 75% Crack Pressure cm3/min	Pressure Control Range	6.9-210 bar
Pressure Control Sensitivity	1522 per turn psi	Seal Material	Nitrile
Adjustment Mechanism	Screw	Flow Rate	1 GAL/MIN, 3.8 L/MIN
Maximum Inlet Pressure Rating	5500 PSI, 380 BAR	Pressure Control Range	100-3000 PSI, 6.9-210 BAR

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