• Prioritizing pressure zones
  • Pump overload & cavitation protection
  • Backup for reservoir supply valves
  • Safeguarding pump minimum flow
  • Switching between pressure regimes


The Model 730-55 Pressure Relief/Sustaining Valve with Solenoid Control is a hydraulically operated, diaphragm actuated control valve that sustains minimum pre-set, upstream (back) pressure regardless of fluctuating flow or varying downstream pressure. It also either opens or closes in response to an electric signal.

When installed as a circulation valve, Model 730-55 relieves excessive line pressure when above maximum pre-set.

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