Bermad WW730-55 Pressure Relief/Sustaining Valve with Solenoid Control



WW730-55 – Pressure Relief/Sustaining Valve with Solenoid Control AS5081 / WaterMark

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.

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


  • Line pressure driven - Independent operation
  • Balanced seal disk - High relief flow capacity
  • In-line serviceable - Easy maintenance
  • Double chamber design
    • Moderated valve reaction
    • protected diaphragm
  • Flexible design - Easy addition of features
  • Variety of accessories - Perfect mission matching
  • "Y" or angle, wide body - Minimized pressure loss
  • Semi-straight flow - Non-turbulent flow
  • Stainless steel raised seat - Cavitation damage resistant
  • Obstacle free, full bore - Uncompromising reliability
  • V-Port Throttling Plug - Low flow stability

Major Additional Features

  • Pressure sustaining and reducing with solenoid control - 723 - 55
  • High sensitivity pilot - 730 -55 - 12
  • Level control & pressure sustaining with bi-level electric float - 753 - 65
  • Pump circulation & pressure sustaining valve - 748
  • High sensitivity pilot - 730 - 55 -12
  • Electrically selected multi-level setting - 730 -45
  • Electric override for fire protection - FP - 730 - 59
  • Electronic pressure sustaining valve - 738 -03



The Model 730 - 55 is a pilot controlled valve equipped with an adjustable, 2 -Way, pressure sustaining pilot and a solenoid pilot. The needle valve continuously allows flow from the main valve inlet into the upper control chamber. The pilot sense upstream pressure, and the solenoid together control outflow from the upper control chamber. Should this pressure flow fall below pilot setting, the pilot closes, enabling pressure to accumulate in the upper control chamber, and causing the main valve to throttle thereby sustaining upstream pressure at the pilot setting.

Should upstream pressure rise above the pilot setting, the pilot releases accumulated pressure and the main valve modules open. Should the solenoid pilot closes, pressure in the upper control-chamber accumulates causing the main valve to shut off. Normally closed, normally open and last position models are available.


WW730-55 – Pressure Relief/Sustaining Valve with Solenoid Control WW730-55 – Pressure Relief/Sustaining Valve with Solenoid Control Brochure