100% Employee Owned, Founded 1954

100% Employee Owned, Founded 1954

Pilot Operated Relief Valves

Pilot Operated Relief Valves function with the use of tank pressure acting on the actuator diaphragm which transfers a force to the pallet to hold the valve closed.  They consist of a main valve, which is the actual pressure relief, and a self-actuated pilot that controls the opening and closing of the main valve in response to developing or receding overpressure.  They are very good for controlling evaporation losses and helping to meet environmental regulations.

Why Use a Pilot Operated Valve:

  • Premium seat tightness to set pressure
  • Allows you to meet stringent environmental laws like the EPA’s method 21 for 500 PPM VOC’s or less
  • Reduce evaporation losses
  • Increase efficiency


  • Low pressure storage tanks
  • Cryogenic storage tanks
  • Natural gas storage
  • Air separation plants
  • VOC process plants
Pilot Operated Relief Valves 1

Components of a pilot operated relief valve

Are you interested in learning more about how Cross company can help specify a pilot operated relief valve for your tank? Contact us today to discuss your project or application with a Cross team member.

See how our process solutions team can help improve quality, increase efficiency, and reduce risk