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Fault Analysis of Stainless Steel Bellows Globe Valves

Stainless steel bellows valve installed in the pipeline of ship power plant, valve occurred stem leaks and stem rust and other issues. After fault analysis, taken appropriate solutions to eliminate the failure to ensure the performance of the valve. Binding site usage analysis, stem leakage mainly due to the valve main structure, the working environment and use operation. 

Bellows globe valve harsh working environment is one of the reasons of causing the failure. Since the bellows valve mounted on the hull in the salt spray environment, and often the upper part of condensate dripping, resulting in an upper thrust ball bearing corrosion, cause the stem contact corrosion.
In use, if open or closed bellows globe valve excessively, it may cause the valve can not meet the performance requirements. When we close the valve, it is possible to crush the sealing surface, cause seal failure, when the valve is opened excessively, resulting in valve leakage.

Globe Valve

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