选择阀门密封面材料时需要考虑的六个因素
2020年12月2日
选择阀门密封面材料时要考虑六大因素。密封面是阀门最关键的工作表面,密封面的质量直接影响阀门的使用寿命,而密封面材料是保证密封面质量的重要因素。因此,在选择阀门密封面材料时应考虑以下因素。耐蚀性。“腐蚀”是指密封件表面被介质损坏的过程。如果表面以这种方式损坏,则不能保证密封性;因此,密封面材料必须是耐腐蚀的。材料的耐腐蚀性主要取决于它的抗拉强度和化学稳定性。耐磨性。“磨损”是密闭面相对运动过程中摩擦造成的损伤。 This damage will inevitably lead to the destruction of the sealing surface, therefore, the sealing surface material must have good anti-scuffing properties, especially the gate valve. The abrasion resistance of the material is often determined by the internal properties of the material. Erosion resistance."Erosion"refers thatthe medium flows through the sealing surface at high speed, so that the sealing surface is damaged. This damage is more obvious in the high temperature, high pressure steam medium used in the globe valve, safety valve. the sealing damage has a great impact, therefore, erosion resistance is also one of the important requirements of the sealing surface material. It should have acertain hardness, and the hardness decreases greatly under the specified working temperature. The coefficient of linear expansion of the sealing face and the body material should be similar, which is more important for the structure of the inlaid seal, in order to avoid additional stress and lose under high temperature. For use at high temperatures, there should be adequate resistance to oxidation, thermal fatigue, andthermal cycling issues. In the current situation, it is very difficult to find a sealing surface material that fully meets the above requirements. For example, for valves used in high speed media, specific attention should belaidto the requirements of erosion resistance of the sealing surface; when the medium contains solid impurities, sealing surface materials with higher hardness should be selected. Here at Dervos, we’re a leading provider for products inindustrial valve, and we’re certified with the CE, ISO, API and other institutions. We strive to offer the best quality products and customer service through our extensive experience. Contact us today for more information—we can’t wait to work with you!
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