• Immediately eliminates pressure peaks
  • Visual indication of system overpressure
  • Filtration system burst protection
  • Thermal expansion overpressure relief
  • System maintenance savings
  • Fully approved to AS5081 / AS4020 & Appraised to WSAA


The Model 73Q Quick Pressure Relief Valve is a hydraulically operated, diaphragm actuated control valve that relieves excessive system pressure when this pressure rises above the pre-set value. It immediately, accurately, and with high repeatability responds to system pressure rise by fully opening. Model 73Q provides smooth drip tight closing.

73Q - Quick Pressure Relief Valve

Optional angle pattern threaded

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