Causes and elimination methods of the most likely

2022-08-22
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Possible valve faults, causes and elimination methods

1 Packing gland is not compressed

2 Filler fails due to long-term use or improper storage

1 Evenly tighten the locknuts that will also meet with the automotive industry and relevant enterprises soon, and compress the packing

2 Replace the packing

Rubber

valve body and bonnet 1. Leakage at the expanded joint of the loss side of Chinese paper industry enterprises

1 The fastening of connecting bolts is uneven

2 Flange sealing surface damage

3 Gasket rupture or failure

1 Tighten evenly

2 Refinish

3 Replace with new gasket

the handwheel does not rotate flexibly or the valve disc cannot be opened and closed

1 The packing is pressed too tightly

2 The pressure end of the packing is flat, and the pressure sleeve device is skewed

3 The valve rod nut is damaged

4 The thread of the valve stem nut is seriously worn or broken

5 Valve rod bending

1 Properly loosen the nut on the packing pressing plate

2 Correct the packing pressing plate

3 Disassemble and trim threads and remove dirt and sundries

4 Replace the valve rod nut

5 Straighten the valve stem

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