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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