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Causes of Butterfly Valve Seat Damage

Causes of butterfly valve seat damage
The valve seat of the butterfly valve, also called the sealing ring, is a component related to the sealing performance of the butterfly valve. It is also the most severely corroded and eroded place by the medium in the pipeline. The damage of the butterfly valve seat will cause the leakage of the butterfly valve, and the serious leakage may even cause major safety hazards, affecting our work.
Causes of damage to the butterfly valve seat
1. The processing quality of the valve seat is not rigorous enough, which leads to cracks, pores, and uneven hardness on the sealing ring.
2. Caused by wrong butterfly valve selection or incorrect operation. Failure to correctly select the butterfly valve model according to the actual working conditions, causing the butterfly valve to be inconsistent with the working conditions, and the valve seat sealing ring was damaged.
3. The butterfly valve is installed randomly or poorly maintained, resulting in damage to the valve seat. Before the butterfly valve is installed, the inside of the valve body and the pipeline are not cleaned, causing impurities in the pipeline to cause damage to the valve seat of the butterfly valve. Furthermore, the butterfly valve was not maintained in time, which kept the valve in an unhealthy state and damaged the seat sealing ring prematurely.
4. The chemical corrosion of the medium, the medium around the valve seat sealing ring does not produce current, the medium directly chemically reacts with the valve seat, corroding the valve seat.
5. Erosion of the medium in the pipeline, the valve seat sealing ring of the butterfly valve is located inside the pipeline, and the valve seat is continuously eroded. These media have suspended particles, and some are corrosive. Over time, the valve seat is in this way Under the erosion of the medium, the sealing surface will be destroyed.
6. Mechanical damage, each time the butterfly plate is opened and closed, it will rub against the valve seat, and the damage to the sealing surface will become more and more serious with the passage of time.
7. Electrochemical corrosion, the contact between the sealing surfaces, the contact between the sealing ring and the closing body and the valve body, the concentration difference of the medium, the oxygen concentration difference, etc., will cause potential difference, electrochemical corrosion, and sealing of the valve seat on the anode side. The ring is corroded.
8. Fatigue damage, the valve seat has its own service life, especially the valve seat of the soft sealing butterfly valve, which has a limited service life. In long-term use, it is easy to age, cracks and delamination on the sealing surface, resulting in deterioration of the sealing performance Difference.
butterfly valve