Common faults and solutions of butterfly valves?

Common faults and solutions of butterfly valves?

As a commonly used pipeline valve, butterfly valves have various advantages such as fast switching, good sealing, and simple structure, and are widely used in industries such as hydraulic engineering, power, and chemical engineering. However, butterfly valves may inevitably experience some malfunctions that affect their normal use. This article will introduce common faults and solutions of butterfly valves.

一、 Leakage

1. Reason for leakage:

(1) Aging or deformation of the sealing ring: The sealing ring is a key component of the butterfly valve. If the sealing ring ages or deforms due to insufficient flexibility, the sealing performance will be greatly reduced, leading to leakage.

(2) Mismatch between valve body and sealing ring: If the valve body and sealing ring of a butterfly valve are not suitable, it can cause leakage problems. If the sealing ring is too wide or too narrow, the trajectory does not match, and leakage can also occur.

2. Solution:

(1) Replace sealing ring: When the butterfly valve leaks, the first step is to check whether the sealing ring has aged or deformed, and replace it with a new one in a timely manner.

(2) Replacing the valve body: If the sealing ring of the butterfly valve does not match the valve body, it is necessary to consider replacing the valve body to ensure that the sealing ring can match the trajectory of the valve.

二、 Rotation is not effective

1. Reason:

(1) Bent or damaged valve stem: When the butterfly valve is in operation, the valve stem is the key rotating part. If the valve stem is bent or damaged, it can cause the valve to rotate poorly.

(2) Mismatch between valve stem and bearing: If the valve stem and bearing do not match, the flexibility and smoothness of the valve cannot be guaranteed.

2. Solution:

(1) Replacing the valve stem: When the butterfly valve does not rotate properly, you can check whether the valve stem is bent or damaged. If there are problems, you can replace the valve stem with a new one to solve the problem.

(2) Replacing bearings: If the valve stem does not match the bearings, a new bearing can be considered to solve the problem, ensuring the flexibility and smoothness of the valve stem.

三、 Loose closure

1. Reason:

(1) Uneven sealing surface: If there are dents or wear on the sealing surface of a butterfly valve, it can cause the valve to not close tightly.

(2) Loose spindle or bearing: If the spindle or bearing of the butterfly valve is loose, the closure of the valve cannot be guaranteed.

2. Solution:

(1) Trim sealing surface: When the butterfly valve is not tightly closed, it can be considered to trim the sealing surface to remove dents and wear on the sealing surface to ensure sealing performance.

(2) Adjusting the spindle or bearing: If the reason for the valve not closing tightly is due to the spindle or bearing being loose, the tightness of the spindle or bearing can be adjusted appropriately to ensure the closure of the valve.

四、 High noise

1. Reason:

(1) Resonance in the pipeline system: When the butterfly valve is working, it will generate shock waves. If the length or material of the pipeline system is not properly arranged, resonance will occur, resulting in noise.

(2) Unreasonable valve structure: If the structure of the butterfly valve is not reasonable, it will cause noise during valve operation.

2. Solution:

(1) Adjusting the pipeline system: When the butterfly valve is noisy, the resonance of the pipeline system can be eliminated by adjusting the length, cross-section, and material of the pipeline system to reduce noise.

(2) Replace or optimize the butterfly valve structure: If the valve structure is unreasonable, it can be considered to replace with a new butterfly valve or optimize the valve to reduce noise.

In short, the solution to butterfly valve faults requires specific analysis and targeted solutions based on specific problems. When using butterfly valves, it is important to regularly maintain and inspect them, promptly identify and solve problems, to ensure their normal use.