Optimization of Closing Ways of Slow Closing Check Valve by Accidental Pump-Stop in Pressure Water Supply Pipeline

To control the pressure of water hammer for a long water pipe supply system, calculations were carried out for the transient process caused by accidental pump-stop using the method of characteristic contours. The pressure of water hammer and relative cavitation volume in every pipe were gained. The numerical results show that the pressure of water hammer are different at different closed modes of slow closing check valve, which also reflects from the relative cavitation volume and regions of cavitation. Further, the finest close mode is recommended, which would be helpful to analyze similar projects in future.