Regarding valve trim, it mainly relates to the sealing surface – why is cemented carbide used?
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Hello everyone. The piping classification provided by a certain design firm is as follows: for all valves, tungsten carbide is the only material used for the sealing surface. I would like to know why. In the entire project, this is the only category in which tungsten carbide is utilized. Medium names: air, low-pressure steam, medium-pressure steam, hot water return, hot water supply; temperature range: 110–300°C; pressure range: 0.15–1 Mpa. Pipe material: 20, GB/T 8163. Valve core material: 13Cr+HF. From the information available on Baidu, it seems that this is because the medium contains steam
Tungsten carbide is often used as a material for sealing surfaces due to its excellent wear resistance and corrosion resistance. When the medium contains steam, the sealing surfaces may be exposed to high temperatures and corrosive substances; the use of cemented carbide can extend the valve’s service life and maintain good sealing performance. .