Flow Check Valves Factory Introduces Troubleshooting Methods For Common Valves

Flow Check Valves Factory introduces the troubleshooting methods of common valves:

1. Valve packing leakage
Failure cause analysis:
①The packing gland is not compressed.
②The filler fails due to long-term use or improper storage.

solution:
①Tighten the nuts evenly to compress the packing.
②Replace the packing.

2. Leakage between sealing surfaces
Failure cause analysis:
①There is dirt and debris attached to the sealing surface.
②The sealing surface is damaged.

solution:
①Clean up the dirt.
②Rework, trim, or replace.

3. Leakage at the connection between the valve body and the bonnet

Failure cause analysis:
①The connecting bolts are not evenly tightened.
②The flange sealing surface is damaged.
③The gasket is cracked or failed.

solution:
①Tighten evenly.
②Refinish.
③ Replace the gasket with a new one.

4. The handwheel is inflexible to rotate or the valve disc cannot be opened and closed

Failure cause analysis:
①The packing is pressed too tightly.
②The packing pressure plate and the pressure sleeve device are skewed.
③The stem nut is damaged.
④The thread of the stem nut is severely worn or broken.
⑤The valve stem is bent.

solution:
①Properly loosen the nut on the packing pressure plate.
②Correct the packing platen.
③Disassemble the trimming thread and remove the dirt.
④Replace the stem nut.
⑤Correct the valve stem.