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
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