Direct Acting Differential Area Relief Valves - RDH083T50

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 RDH083T50
$73.08
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Products specifications
Attribute nameAttribute value
UOMEASeal MaterialNitrile
Adjustment MechanismTamper ResistantMounting 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 MechanismTamper ResistantMaximum Tank Pressure350 bar
Maximum Pressure Setting5000 psiPort Thread Sizen/a
Maximum Flow Rate12 Gal/minMaximum Inlet Pressure Rating380 bar
Maximum Operating Temperature+121 °CFilter Efficiency RatingISO 4406 18/16/13, SAE Class 4
For Fluid TypeMineral-based or synthetic hydraulic fluidsValve MaterialAll parts steel. All operating parts hardened steel
Operating Temperature-34 to +121 °CMounting TypeScrew in cartridge valve
Weight0.19 kgStandard Setting Pressure2500 psi
Cracking PressureN/A psiLeak Rate10 @ 75% Crack Pressure drops/min
ConfigurationDifferential Area Relief, Differential Relief w/Reverse Flow CheckReseat Pressure75% of pressure setting
Installation Torque31 NmPressure Control Range2000-5000 psi
Pressure Control Sensitivity614 per turn psiMinimum Operating Pressure380 bar
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