26. August 2015 · Comments Off · Categories: BALL VALVE

V notch port ball valves where possible leaks are common: packing leak after leak gland, flange leak, the leak was sealed between the seat and the V notch port ball valves, actuator leaks and so on. V notch port ball valve leaks are causing the ball run, run, drip, leak phenomenon in which, V notch port ball valve leak is a very serious problem, if not pay attention caused easily lead to accidents, here I plant engineers generated from these leakage causes and solutions should be taken two ways to explain this line:

A phenomenon: V notch port ball valves packing leak.
Analysis: V notch port ball valves may be because the padding bolts not pressed;
Solution: Under normal circumstances rather tight V notch port ball valves packing gland nut can be solved V notch port ball valves packing leak problem.
Causes: V notch port ball valve operation result of the use of V notch port ball valves filling out the wear and tear;
Solution: Remove the V notch port ball valves packing cover, replace the V notch port ball valves packing.
Phenomenon II: V notch port ball valves gland leak
Causes: O-ring damage;
Solution: Replace the O-ring.
Three phenomena: V notch port ball valves flange leaks
Causes: V notch port ball valves flange gasket loses its elasticity;
Solution: Replace the flange gasket.
Analysis: flange gasket dislocation;
The solution: re-flange gasket sealing surface placed in position.
Phenomenon four: V notch port ball valves seat outside the test leak was sealed
Causes: O-ring or a graphite ring damage;
Solution: Replace O-ring or a graphite ring.
Phenomenon V: V notch port ball valves was sealed between the spool and seat leakage
Analysis: closing the actuator does not reach 90 degrees;
Solution: Adjust the actuator stroke so that it can complete in a fully closed state.
Analysis: sealing surface wear;
Remedy: Remove the V notch port ball valves seal seat, remove the ball, sealing seat and plug polished repair. If the V notch port ball valves seal seat badly damaged, replace the V notch port ball valves seal seat.
Phenomenon Six: V notch port ball valves pneumatic actuator leak.
Causes: O-ring damage is serious;
Solution: Replace the V notch port ball valves O-ring.

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