Piston valve WW-843

electrichydraulically-operatedfor control

The Model 843 High Pressure, Booster Pump Control & Pressure Sustaining Valve is a hydraulically operated, piston 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 or pump differential pressure regardless of fluctuating flow. PRODUCT FEATURES & BENEFITS Line pressure driven Independent operation No motor required Long term drip tight sealing Solenoid controlled Low power consumption Low cost wiring Wide ranges of pressures and voltages Normally Open or Normally Closed Check feature Replaces line sized check valve Fail-safe mechanical closure In-line serviceable – Easy maintenance Flexible design – Easy addition of hydraulic features TYPICAL PRODUCT APPLICATIONS Typical Application Network Over Demand Network demand is greater than pump design specifications: During empty pipeline filling During over demand by consumers When the pump pressure specification is much higher than system resistance Any of these factors might cause pump overload and cavitation damage. The Model 843, by adding a pressure sustaining feature to the Booster Pump Control Valve, ensures that the pump operates within design specifications protecting both the pump and the system. When pump upstream pressure varies use the model WW-843-06 with differential pressure sensing