Transmission failure
Transmission failure often manifests as a blocked valve stem, inflexible operation, or inoperable valve. ...
Valve opening and closing failure
The poor opening and closing of the valve manifests itself as the valve cannot be opened or closed, and the valve cannot operate normally. ...
Valve leaking
13
2020.03
Valve leaks are: stem leakage; gland leakage; flange gasket leakage....
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