Flange valve failure and solution description

First, the leakage of the central flange valve parts and solutions:

1. The flange connection bolts are not tightened or the tension is uneven.

Solution: Loosen the screw and re-tighten it evenly symmetrically.

2. The gasket is damaged or invalid.

Solution: Replace the gasket.

3. There is dirt between the flange sealing surfaces.

Solution: Remove the cleaning flange.

Second, the stuffing box leak:

1. The packing is loose or the packing gland is biased.

Solution: The packing gland should be evenly pressed.

2. The filler fails.

Solution: Replace the new packing.

Third, the sealing surface leakage:

1. The sealing surface is stained with dirt.

Solution: Clean the sealing surface.

2. The sealing surface is damaged.

Solution: Grind the sealing surface or replace the sealing surface.

Fourth, the valve stem transport is not flexible:

1. The valve core cover is too tight or the bearing is worn.

Solution: Adjust the packing tightness or replace the bearing.

2. There is debris or dust between the stem or stem nut, and the stem or stem nut is damaged.

Solution: Disassemble the cleaning valve stem and replace the valve stem or stem nut if damaged.

3. The opening and closing device has failed. Solution: Check the repair after the fault according to the device manual.