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Possible Failures of Butterfly Valves and Their Elimination Methods

labiedal001 June 24, 2021 Vacuum fittings, Valve

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Fault: Leakage on both ends of the valve

1. The sealing gaskets on both sides fail,
2. The pipe flange has uneven or not compressed pressure.

Elimination method:

1. Replace the sealing gasket.
2. Tighten the flange bolts (evenly).

Butterfly valve failure: leakage of sealing surface

1. There are debris in the butterfly plate and sealing ring of the butterfly valve.
2. The butterfly plate of the butterfly valve and the closed position of the seal are not correct.
3. The outlet is equipped with flange bolts that are not compressed or stressed.
4. The direction of the pressure test is not as required.

Elimination method

1. Eliminate impurities and clean the inner cavity of the valve.
2. Adjust the limit screws of actuators such as worm gears or electric actuators. In order to achieve the correct closing position of the valve.
3. Check the mounting flange plane and bolt compression force, and they should be evenly compressed.
4. Spinning in the direction of the arrow

These two kinds of faults are generally encountered by butterfly valves. You can eliminate the faults according to this method.