Material selection of friction pair of mechanical seal At present, there are many types of materials used as friction pairs for mechanical seals. Commonly used non-metallic materials are graphite, polytetrafluoroethylene, phenolic plastics, ceramics, etc. Commonly used metal materials are cast iron, carbon steel, chromium steel, chromium-nickel steel, bronze, and cemented carbide. In addition, there are surface treatments such as...
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