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Parker RDH042S50 - 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. RDH042S50

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Products specifications

Attribute name	Attribute value
Seal Material	Nitrile	Weight	0.07 lb
Body Material	n/a	Division	Hydraulic Systems Division
Maximum Kinematic Viscosity	45-2000 SSU (6 to 420 cSt)	Minimum Operating Temperature	-34 °C
Function	Direct Acting	Configuration	Pressure Relief
Actuation Type	Pressure Sensing	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	5500 psi
Flow Rate	3.8 L/min	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
Installation Torque	10 Nm	Maximum Pressure Setting	350 bar
Standard Setting Pressure	2500 psi	Pressure Control Sensitivity	118 per turn bar
Reseat Pressure	80% of pressure setting	Leak Rate	0.66 @ 75% Crack Pressure cm3/min
Pressure Control Range	1500-5000 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	1500-5000 PSI, 103-350 BAR

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