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Cast Iron Swing Check Valves1

Cast iron swing check valves permit flow in one direction only and close automatically when flow reverses. They are entirely automatic in action, depending upon differential pressure and velocity of flow within the line to perform their functions of opening and closing


The disc and any associated moving parts may be in a constant state of movement if the velocity pressure is not sufficient to hold the disc in a wide open and stable position.


Premature wear and noisy operation or vibration can be avoided by selecting the size of the check valve on the basis of flow conditions rather than selecting the check valve according to the size of the pipeline.