Failure Analysis of Water Pump Valve in Power Plant

Leakage of a water pump valve in a power plant was found in use.Disaggregation checking and failure analyses showed that the leak of this pump valve could meet the condition of crevice corrosion when the stuffing filled with corrosive medium.Coarseness of valve surface became severe after corrosion,and the carbon fibre gasket was damaged after circles.Then the stuffing lost the function of airproof,and the pump valve began leaking when the gap between rod and stuffing increased.