What are the common problems of a globe valve?

date:2018/8/14 10:11:38 source:

Leakage of sealing surface

Reason: 1. medium flow direction is not correct, erosion sealing surface.

            2. flat sealing surface is easy to deposit dirt.

            3. conical face seal pairs are not concentric.

            4. lining seal face damage and aging

Two. Failure

Reason: 1. needle valve is blocked.

            2. small diameter valves are blocked by foreign bodies.

            3. disc and throttle cone fall off.

            4. internal stem nut or stem trapezoidal thread damage

Three. Throttling is not allowed.

Reason: 1. gauge is not zero, ruler is missing.

            2. throttling cone erosion seriously

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