Fluorine lined butterfly valve is a kind of valve equipment widely used in chemical, petroleum, pharmaceutical and other industries, because it is lined with polytetrafluoroethylene PTFE material and has excellent corrosion resistance. However, in the actual use process, fluorine lined butterfly valves may still encounter some problems. Today, fluorine lined butterfly valve manufacturers and everyone together to see what problems exist in fluorine lined butterfly valves.
1. Material problem
The core advantage of the fluorine lined butterfly valve is the polytetrafluoroethylene material lined with it, but the material itself also has certain limitations.
(1) Temperature limit
The temperature range of polytetrafluoroethylene is usually between -196℃ and 200℃. If the medium temperature is too high or too low, it may lead to aging or embrittlement of the material, affecting the valve performance.
(2) Insufficient mechanical strength
The mechanical strength of polytetrafluoroethylene is low, and the lining may fall off or be damaged under high pressure or high flow rate conditions.
Solution: According to the temperature and pressure conditions of the medium, select the appropriate fluorine-lined butterfly valve type, and regularly check the status of the lining layer.
2. Structural problems
The structural design of the fluorine lined butterfly valve may also affect its use effect.
(1) Reduced sealing performance
After long-term use, the sealing surface between the seat and the plate may fail due to wear or corrosion, resulting in leakage.
(2) The operating torque is too large
If the valve design is unreasonable or insufficient lubrication, it may lead to excessive operating torque and increase the difficulty of opening and closing.
Solution: Select high quality sealing materials and maintain valves regularly to ensure lubrication of sealing surfaces and transmission components.
3. Use environmental issues
The operating environment of fluorine lined butterfly valve has an important influence on its performance.
(1) Corrosive medium
Although polytetrafluoroethylene has excellent corrosion resistance, local corrosion or penetration may still occur in some highly corrosive media.
(2) granular medium
If the medium contains solid particles, it may lead to wear of the seat and the disc, affecting the sealing performance.
Solution: Select the appropriate valve material according to the characteristics of the medium, and add a filter device before the medium enters the valve to reduce the impact of particles.
4. Installation and maintenance problems
Incorrect installation or lack of maintenance can also cause problems with fluorine-lined butterfly valves.
(1) Improper installation
If the installation is not in accordance with the specifications, it may lead to uneven force on the valve and affect its service life.
(2) Insufficient maintenance
Prolonged lack of maintenance can lead to aging or damage of valve components, increasing the risk of failure.
Solution: Strictly follow the installation specifications, make a regular maintenance plan, and replace the wearing parts in time.
