Cla-Val Pacific 60-31 and 660-31 Booster Pump Control Valves are pilot-operated valves designed for installation on the discharge of booster pumps to eliminate pipeline surges caused by the starting and stopping of the pump.
The pump starts against a closed valve. When the pump is started, the solenoid control is energized and the valve begins to open slowly, gradually increasing line pressure to full pumping head. When the pump is signaled to shut-off, the solenoid control is de-energized and the valve begins to close slowly, gradually reducing flow while the pump continues to run. When the valve is closed, a limit switch assembly, which serves as an electrical interlock between the valve and the pump, releases the pump starter and the pump stops.