Piston valve WW-840

electrichydraulically-operatedcontrol

The Model 840 High Pressure, Booster Pump Control Valve is a hydraulically operated, piston actuated active check valve that opens fully or shuts off in response to electric signals. It isolates the pump from the system during pump starting and stopping, to prevent pipeline surges. PRODUCT FEATURES & BENEFITS Line pressure driven Independent operation No motor required Long term drip tight sealing Solenoid controlled Low cost wiring 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 Full powered opening (option B) and closing Non-slam opening and closing characteristic Balanced seal disk – High flow capacity Flexible design – Easy addition of hydraulic features TYPICAL PRODUCT APPLICATIONS Typical Applications In this system, a pump battery supplies the main line through a manifold. The Model 840, installed downstream from each pump: Prevents surge generation rather than minimizing surge damage Provides surge free starting and stopping of supplementary pumps Allows surge free switching between “on-duty” pumps Delays reaction for variable speed primary pump to single speed supplementary pump going on line or off line