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Parker RU104S12B - Unloading Relief Valves

Parker’s unloading pressure control valves automatically charge and maintain a specific pressure range within accumulators by loading and unloading pump flow. Usable with fixed or variable pumps and pressure of 420 bar (6000 psi) and flow up to 1 gpm.

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Brand Parker

Part No. RU104S12B

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Products specifications

Attribute name	Attribute value
Leak Rate	48 @ 3000 PSI (250 BAR) cm3/min	Pressure Control Range	55.2-82.7 bar
Filter Efficiency Rating	ISO 4406 18/16/13, SAE Class 4	Maximum Pressure Setting	1200 psi
Flow Rate	0.25 Gal/min	Function	Unloading Relief Valve
Adjustment Mechanism	Screw	Maximum Tank Pressure	3000 psi
Maximum Flow Rate	0.25 Gal/min	Valve Material	All parts steel. All operating parts hardened steel
Minimum Operating Temperature	-35 °F	Body Material	n/a
Division	Hydraulic Cartridge Systems Division	Division	Hydraulic Systems Division
Maximum Inlet Pressure Rating	250 bar	Installation Torque	50-56 Nm
Actuation Type	Pressure Sensing	For Fluid Type	Mineral-based or synthetic hydraulic fluids
Maximum Kinematic Viscosity	45-2000 SSU (6 to 420 cSt)	Seal Material	D-Ring (Standard)
Maximum Operating Temperature	+93 °C	Weight	1 kg
Cavity Size	C10-4	Operating Temperature	-35 to +250 °F
Standard Setting Pressure	69 bar	Maximum Operating Pressure	3600 psi
Adjustment Mechanism	Screw	Seal Material	D-Ring (Standard)
Maximum Flow Rate	0.25 GAL/MIN, 1 L/MIN	Pressure Control Range	800-1200 PSI, 55.2-82.7 BAR

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