Direct Acting Differential Area Relief Valves - RDH083K50

Parker’s direct acting differential area relief valves are for fast response intermittent applications and work up to 380 bar (5500 psi) and 151 lpm (40 gpm). These valves have lower leakage rates and pressure rise than standard direct acting reliefs.
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SKU RDH083K50
$73.52
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Products specifications
Attribute nameAttribute value
UOMEASeal MaterialNitrile
Adjustment MechanismKnobMounting TypeScrew in cartridge valve
Cracking PressureN/AFlow Rate12 GAL/MIN, 45 L/MIN
Maximum Inlet Pressure Rating5500 PSI, 380 BARStandard Setting Pressure2500 PSI, 172 BAR
Pressure Control Range2000-5000 PSI, 138-350 BARSeal MaterialNitrile
Body Materialn/aMaximum Operating Pressure5500 psi
DivisionHydraulic Systems DivisionMaximum Kinematic Viscosity45-2000 SSU (6 to 420 cSt)
Minimum Operating Temperature-30 °FFlow Rate12 Gal/min
FunctionDirect ActingActuation TypePressure Sensing
Cavity SizeC08-2Operation TypeAutomatic
Adjustment MechanismKnobMaximum Tank Pressure350 bar
Port Thread Sizen/aMaximum Flow Rate12 Gal/min
Maximum Inlet Pressure Rating380 barMaximum Operating Temperature+250 °F
Filter Efficiency RatingISO 4406 18/16/13, SAE Class 4For Fluid TypeMineral-based or synthetic hydraulic fluids
Valve MaterialAll parts steel. All operating parts hardened steelOperating Temperature-34 to +121 °C
Mounting TypeScrew in cartridge valveMaximum Pressure Setting350 bar
Cracking PressureN/A psiStandard Setting Pressure172 bar
Leak Rate.66 @ 75% Crack Pressure cm3/minConfigurationDifferential Area Relief, Differential Relief w/Reverse Flow Check
Weight0.43 lbReseat Pressure75% of pressure setting
Installation Torque31 NmPressure Control Range138-350 bar
Pressure Control Sensitivity614 per turn psiMinimum Operating Pressure380 bar
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