Pressure Relief/Pressure Sustaining Valve 

The pressure relief/pressure sustaining valve shall function to prevent main line pressure from exceeding a predetermined maximum, preventing the upstream pressure from falling below a predetermined minimum.

The OCV 108-2 has a wide range of applications – anywhere a system must be protected from pressures that are too high (relief) or too low (sustaining). Typical applications include:

  • Pump systems
  • Fuel distribution systems


  • Relief Valve – limits inlet pressure by relieving excess pressure
  • Pressure Sustaining – prevents inlet pressure from dropping below a predetermined minimum
  • Operates over a wide flow range
  • Inlet pressure is adjustable with a single screw
  • Quick opening; adjustable closing speed
  • Can be maintained without removal from the line
  • Factory tested and can be preset to your requirement