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| AUTOMATIC CONTROL CHECK (PIVOT OFF CENTER) | ||
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All previously described Check Valves open and close when flow from the
pump starts or stops. The opening and closing of the disc, poppet or flapper
is uncontrolled.
The Automatic Control Check Valve is a unique Check Valve. It is recommended where pump flow control is essential to prevent pressure surges when flow starts or stops in the pipeline. The valve (disc) is electrically controlled to permit remote operation of automatic pump stations. The valve functions as a shut-off valve, slowly opening after flow starts and slowly closing to close the Control Check Valve when stopping the flow. Should loss of electrical power occur, the valve will automatically control shut-off hydraulically, without electrical power. |
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