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Pilot Operated Pressure Relief Valves

Pilot Operated Pressure Relief Valves


Manufacturer of Pilot Operated Pressure Relief Valves.
Like other pressure relief valves (PRV), pilot operated relief valves (PORV) are used for emergency relief during overpressure events (e.g. a tank gets too hot and the expanding fluid increases the pressure to dangerous levels). The distinction between PORV and conventional PRV is that pilot valves use system pressure to seal the valve. APRV typically uses a spring to hold the disc or piston on seat. The essential parts of a PORV are a pilot valve (or control pilot), a main valve, a pilot tube, the dome, a disc or piston, and a seat. The volume above the piston is called the dome.

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Product Specification:

Product Features

  • Ease of precision settings
  • Only the pilot needs to be set
  • Lower profile and weight than spring operated models for high settings
  • Full open at less than 10% overpressure
  • Modulating action conserves product since valve opening is proportional to overpressure
  • Soft seats seal tight to conserve product and minimize valve wear which improves reliability

Material: Choice of aluminum, carbon steel, stainless steel, or special materials for the main body

Sizes: 2" through 12"

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