1. Leakage at the packing of butterfly valve

Faults:

(1) The filler has exceeded its usage period and has aged.

(2) Excessive force during operation.

(3) The live bolt is not tightened.

Solutions:

(1) Aging or damaged fillers should be replaced in a timely manner.

(2) It should be operated uniformly with normal force, and no casing or other methods should be added.

(3) Evenly tighten the bolts that hold down the packing.

2. Leakage at sealing surface of butterfly valve

Faults:

(1) The installation direction of the valve does not match the flow direction of the medium.

(2) The butterfly valve does not close properly.

(3) The butterfly valve that has been closed for a long time has accumulated scale on the sealing surface.

(4) The sealing surface is severely damaged.

Solutions:

(1) Pay attention to installation inspection and ensure that it is tightly closed in place.

(2) Open a gap in the valve and allow the high-speed fluid to flush away any dirt on the seal.

(3) Re grind and thicken the adjusting gasket for compensation.

3. Leakage at the flange connection of butterfly valve

Faults:

(1) Uneven tightening force of bolts.

(2) Aging and damage of gaskets.

(3) The material used for the gasket does not meet the requirements of the working medium.

Solutions:

(1) Tighten the bolts evenly again.

(2) Replace the gasket in a timely manner.

(3) Select gasket materials and forms correctly according to the requirements of the working conditions.

4. Damaged at handle and handwheel of butterfly valve

Faults:

(1) Incorrect use.

(2) Loose fasteners.

(3) Damage to the connection between the handle, handwheel, and valve stem.

Solutions:

(1) Prohibit the use of pipe pliers, long levers, impact tools, etc.

(2) Repair and repair at any time.

5. Jamming at worm gear drive of butterfly valve

Faults:

(1) Unclean embedded dirt, affecting lubrication.

(2) Poor operation.

Solutions:

(1) Please keep it clean and refuel regularly.

(2) If a bite is found during operation and there is significant resistance, the operation cannot continue, otherwise the damage will worsen.

6. Electric installation fault of butterfly valve

Faults:

(1) Poor lubrication, foreign objects stuck inside the valve causing excessive torque.

(2) Motor malfunction.

Solutions:

(1) Oil should be added and kept clean to ensure that the oil pipe is in good condition, the packing is moderately compressed, and foreign objects are promptly removed.

(2) The working time of the motor should not exceed 15 minutes, and the power supply should be normal. It should be avoided to touch and get damp.