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Materials and conditions of use of valve stems and stem nuts..

During the opening and closing process of the valve, the valve stem is not only a moving part and a force-bearing part, but also a sealing part. At the same time, it is impacted and corroded by the medium, and also produces friction with the packing. Therefore, when selecting the valve stem material, it must be ensured that it has sufficient strength, good impact toughness, abrasion resistance, and corrosion resistance at the specified temperature. The valve stem is a wearing part, and attention should also be paid to the mechanical processing performance and heat treatment performance of the

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Jun,25 27