Several points that cause easy damage to the sealing surface of high pressure ball valves（一）
First, the high pressure ball valve causes damage to the sealing surface, the total can be summarized into two kinds. Seal surface damage caused by man-made damage and natural damage of two kinds. Man-made damage is caused by poor design, poor manufacturing, improper selection of materials, improper installation, poor use and poor maintenance and other factors. Natural damage, is the normal working conditions of the valve wear and tear, is the media on the sealing surface of the inevitable erosion and erosion caused by damage.
Second, high-pressure ball valve mechanical damage, the sealing surface in the process of switching will produce abrasions, bruises, squeezing and other damage. Between the two sealing surfaces, atomic interpenetration seepage occurs under the action of high pressure, resulting in the phenomenon of adhesion. When the two sealing surfaces move to each other, the adhesion is easily pulled apart. The higher the surface roughness of the sealing surface, the more easily this phenomenon occurs. High-pressure ball valve in the process of closure, the ball center in the process of returning to the seat will touch and squeeze the sealing surface, so that the sealing surface local wear or indentation.
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