Description
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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