Analysis of the common check valve and water hammer check valve defect characteristics, study the mechanism of optimization Close feature eliminates water hammer and prevent the reversal of the pump, draw meaningful conclusions, check for proper selection and use of guiding significance.

With the development of our national economy and improving people's living standards. Urban central heating system has been gradually replaced by household type of dispersion-burning stove, currently in Beijing, Shenyang and other cities have or are building large centralized heating system, central heating system in the future will be toward large-scale, complex direction . Such large-scale central heating systems heating large scale water hammer damage accident occurred once strong, serious consequences, it must take active preventive measures to minimize and prevent water hammer phenomenon.