Bermad WW-748 Large Metal Hydraulic Pump Circulation/Pressure Sustaining Control Valve (AS5081/WaterMark)

The Model 748 Pump Circulation and Pressure Sustaining Control Valve adds the advanced “active check valve” logic to standard pump systems. It is a hydraulically-operated, diaphragm-actuated, control valve that opens or shuts off in response to electric signals (during the pump starting and stopping processes) while sustaining discharge pressure.

By progressively circulating pump flow, it enables a standard mechanical check valve to respond gradually during the pump starting and stopping processes, preventing pipeline surges.

Model 748 isolates system 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)
• Applicable to existing systems
• Controlled pipeline fill-up

FEATURES

• Line pressure driven
  • Independant operation
  • No motor required
  • Long term drip tight sealing
• Off-line (circulation) installation
  • Replaces in-line "active check valve"
  • Reduced system energy consumption
  • Low capital investment
  • Short valve operation time
  • Applicable to existing system
• Solenoid controlled
  • Wide ranges of pressures and voltages
  • Low cost wiring
• In-line serviceable - Easy maintenance
• Double chamber
  • Full powered opening and closing
  • Non-slam opening and closing characteristics
  • Protected diaphragm