Analysis on the Causes of the Damage of Butterfly Valve Gasket

<p>The structure of butterfly valve gasket consists of valve body, valve stem, butterfly plate, valve seat (sealing ring) and transmission device. The sealing ring of the butterfly valve is related to the sealing performance of the butterfly valve, and it is also the most severely corroded and eroded place by the medium in the pipeline. The damage of the butterfly valve gasket&nbsp;will cause the butterfly valve to leak, and the serious leakage will have a huge impact on our production work. What are the reasons for the damage of the b<a href="https://www.jdoseal.com/jdseal-food-grade-vmq-epdm-fkm-38-51dn40dn50-for-butterfly-valve-gasket" rel="noopener noreferrer" target="_blank">utterfly valve gasket</a>? Next, let's make an analysis for everyone.</p><p><br></p><p>Analysis on the causes of the damage of butterfly valve gasket</p><p>1. The processing quality of the sealing ring is not rigorous enough, which leads to cracks, pores, and uneven hardness on the sealing ring.</p><p>2. Caused by wrong butterfly valve selection or incorrect operation. Failure to correctly select the butterfly valve model according to the actual operating conditions, causing the butterfly valve to be inconsistent with the operating conditions, and the sealing ring was damaged.</p><p>3. The butterfly valve is installed randomly or poorly maintained, resulting in damage to the sealing ring. The valve body and pipeline were not cleaned before installation of the butterfly valve, causing impurities in the pipeline to damage the butterfly valve gasket. Furthermore, the butterfly valve was not maintained in time, which kept the valve in an unhealthy state and damaged the sealing ring prematurely.</p><p>4. The chemical corrosion of the medium, the medium around the sealing ring does not produce current, the medium directly chemically interacts with the sealing ring, corroding the sealing ring. </p><p>5. Erosion of the medium in the pipeline. The sealing ring of the butterfly valve is located inside the pipeline. The erosion of the sealing ring is continuous. These media have suspended particles, and some are corrosive. Over time, the sealing ring is in such a medium. Under erosion, the sealing ring will be damaged. </p><p>6. Mechanical damage. The sealing ring of the butterfly valve has a sealing ring and a butterfly plate. Each time the butterfly plate is opened and closed, it will rub against the sealing ring, and the damage to the sealing ring will become more and more serious over time. The higher the ring surface roughness, the more likely this phenomenon will occur.</p><p>7. Electrochemical corrosion, the sealing ring contact with each other, 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 produce potential difference, electrochemical corrosion will occur, and the sealing ring on the anode side will be damaged. corrosion. </p><p>8. Fatigue damage, the sealing ring has its own service life, especially the sealing ring 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 changes in sealing performance difference.</p><p><br></p><p>From the above analysis of the reasons for the damage of the butterfly valve gasket, it can be concluded that the sealing ring is very important for the safe and stable operation of the butterfly valve. A good sealing ring is not only reflected in the quality and material selection, but also requires us to do daily maintenance and replacement work.</p>