RAH121F20V - Pilot Operated Relief Valves | South Africa

Pilot Operated Relief Valves | #RAH121F20V

Pilot Operated Relief Valves | #RAH121F20V OBSOLETE

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Technical Specifications

  • Flow Rate: 50 GAL/MIN, 189.5 L/MIN
  • Maximum Inlet Pressure Rating: 5500 PSI, 380 BAR
  • Pressure Control Range: 200-2000 PSI, 13.8-138 BAR
  • Adjustment Mechanism: Fixed
  • Seal Material: Fluorocarbon
  • Division: Hydraulic Systems Division
  • Flow Rate: 50 gal/min, 189.5 L/min
  • Maximum Inlet Pressure Rating: 5500 psi, 380 bar
  • Pressure Control Range: 200-2000 psi, 13.8-138 bar
  • Adjustment Mechanism: Fixed
  • Seal Material: Fluorocarbon
  • Maximum Flow Rate: 50 gal/min, 189.5 L/min
  • Maximum Operating Pressure: 5000 psi, 350 bar
  • Maximum Tank Pressure: 5000 psi, 350 bar
  • Standard Setting Pressure: 1000 psi, 69 bar
  • Maximum Pressure Setting: 2000 psi, 138 bar
  • Pressure Control Sensitivity: N/A psi
  • Reseat Pressure: 80% of pressure setting
  • Actuation Type: Pressure Sensing
  • Configuration: Pressure Relief
  • Leak Rate: 82 @ 75% Crack Pressure cm3/min
  • Mounting Type: Screw in cartridge valve
  • Cavity Size: C12-2
  • Function: Pilot Operated
  • Operation Type: Automatic
  • For Fluid Type: Mineral-based or synthetic hydraulic fluids
  • Maximum Kinematic Viscosity: 45-2000 SSU (6 to 420 cSt)
  • Filter Efficiency Rating: ISO 4406 18/16/13, SAE Class 4
  • Valve Material: All parts steel. All operating parts hardened steel
  • Installation Torque: 92-96 lb-ft, 124-130 Nm
  • Operating Temperature: -15 to +400 °F, -26 to +204 °C
  • Maximum Operating Temperature: +400 °F, +204 °C
  • Minimum Operating Temperature: -15 °F, -26 °C
  • Weight: 0.48 lb, 0.22 kg
  • Body Material: N/A
Safety Warning

Item Information

Parker’s pilot operated relief valves provide a stable design with low pressure drop meant for continuous duty applications while operating with less hydraulic noise. These valves can work with pressures up to 420 bar (6000 psi) and flows up to 400 lpm (106 gpm) in a reliable and compact design. Parker’s pilot operated relief valves are ideal for limiting system pressure or in standard relief valve applications within mobile and industrial equipment such as agricultural, aerial, refuse, industrial power unit systems, mining equipment, and other heavy duty fluid power pressure control circuits.

Markets:
• Miscellaneous Industrial
• Miscellaneous Manufacturing
• Miscellaneous Mobile

Features/Benefits:
• High pressure and flow capacity
• Low leak ball and poppet designs
• Compact design
• Internal screens
• Hardened, precision ground parts for durability
• All external parts zinc plated

Applications:
• System pressure limiter
• Port/cross-port relief
• Swing relief
• Motor braking

Additional Technical Insight:
This family of valves is best suited for continuous duty systems where the valve is asked to operate beyond any intermittent use.  They can be used to maintain system pressure for long periods of time.  Additionally, where systems may have large rates of change in flow, the pilot operated valves can accommodate these changes without excessive pressure rise or sometimes called pressure override.  Due to the flow opening areas through the valve, these spool type valves will operate more quietly than a conventional direct acting valve. One must also consider the leakage component as the spool is, by design, going to pass a small leakage flow, whereas a direct acting valve does not pass significant flow until the cracking pressure is reached.  Spool type relief valves should not be used in load holding application.

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Where to Buy

Local Contact

South Africa Headoffice

Parker Hannifin (Africa) Pty LTD

Sales Company South Africa

10 Berne Avenue

Aeroport

Kempton Park

Gauteng

South Africa

1620

Phone

0027 11 961 0700

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