Abnormally shut down valve, if close the program properly, it may cause water hammer due to off valve pipe rupture

With the development of urban construction and people's living standards improve, more and more long-distance water conveyance project. Long distance water conveyance and pump pressure of gravity in two ways, gravity water system does not require  Instrument valve manifolds  during normal operation is less than the hydrostatic head piezometric head, but when the pipeline gate valve is closed, the tube hydrostatic head is the largest terrain largest gap, the greater the gap, the higher the pressure pipe, when the gate valve is abnormally shut down, if the shutdown  Check valve , close the valve may cause water hammer pipe rupture, causing the drying up bridging the water hammer. Giant water hammer pressure often affects the normal operation of the pipeline and even devastating harm. So it brings water system's  Double ended cylinder  have attracted the attention of researchers home and abroad, so this study schedule for water safety significance. Gravity flow water for long distance pipeline water hammer protection systems research, there are a variety of domestic and international solutions and protective measures, including the valve as the most common pipe fittings.