Analysis and Treatment of Valve Failure Causes

Valve packing leakage.

Reason Analysis:

1.The filling cap was not tightly sealed.
2.The packing material has become ineffective due to prolonged use or improper storage.

Solution:

Tighten the nuts evenly to compress the packing.
2.Material replacement.

Seal face leakage.

Reason Analysis:

1.Foreign matter is adhering to the sealing surface.
2.Sealing surface damage.

Solution:

1.Clear out the trash thoroughly.
2.Reprocess, retrim, or replace.

Issue: Leakage at the valve body and valve cover connection.

Reason Analysis:

1.Uneven bolt tension.
2.Damaged法兰sealing face.
3.Gasket rupture or failure.

Solution:

1.Evenly tighten.
2.Revised and Refined.
3.New gaskets installed.

Issue: Inadequate wheel rotation or inability to open/close valve petals.

Reason Analysis:

1.The filling is too tight.
2.Filler plate, the clamping sleeve assembly is misaligned.
3.Valve rod nuts are damaged.
4.The thread of the valve rod nut is severely worn or broken.
5.Valve rod bending.

Solution:

1.Loosen the nuts on the packing gland evenly.
2.Adjust filling plate.
3.Disassemble and clean threads, and remove debris.
4.Replace valve rod nuts.
5.Correcting Valve Rods.