Bermad 743 Booster Pump Control & Pressure Sustaining Valve



743 – Booster Pump Control & Pressure Sustaining Valve AS5081

The Model 743 Booster Pump Control & Pressure Sustaining Valve is a hydraulically operated, diaphragm actuated active check valve that opens or shuts off in response to electric signals. It isolates the pump from the system during pump starting and stopping, to prevent pipeline surges. While open, it sustains minimum discharge pressure regardless of fluctuating flow. Model 743 isolates systems from the effects of pump starts and stops for:

  • Solitary single speed pumps
  • Battery of single speed pumps (add & switch)
  • Battery of variable speed pumps (add)
  • Pump overload and cavitation protection
  • Controlled pipeline fill-up


  • Line pressure driven
    • Independent operation
    • No motor required
    • Long term drip tight sealing
  • Solenoid controlled
    • Low cost wiring
    • Low power consumption
    • Wide ranges of pressures and voltages
    • Normally open or Normally Closed
  • Check feature (spring loaded type)
    • Replaces line sized check valve
    • Fail-safe mechanical closure
  • In-line serviceable - Easy maintenance
  • Double chamber
    • Non-slam opening and closing characteristics
    • Protected diaphragm
  • Balanced seal disk - High flow capacity

Major Additional Features

  • Pump differential pressure sustaining - 743-06
  • Electronic control - 743 - 18
  • Pressure sustaining & Pressure reducing - 743 - 2Q


The Model 743 is a pilot controlled valve equipped with an adjustable, 2-way, pressure sustaining pilot (optional with sealed spring cell), a 2-way solenoid pilot (optional 3-way), a limit switch and check valves.

Two optional solenoid

  • 2-Way solenoid
  • 3-Way solenoid, controlling the pressure sustaining pilot sealed spring cell


743-BOOSTER-PUMP-CONTROL-&-PRESSURE-SUSTAINING-VALVE 743 – Booster Pump Control & Pressure Sustaining Valve Brochure