The research and development of mechanical seals has now shown two main directions (2)-

The research and development of mechanical seals have now shown two main directions (2)

　2016-12-14　　

The second is that with the development of non-asbestos materials, more and more products are available for selection. However, there is currently little information about their fire resistance, such as airtightness, loss 1, creep relaxation, and tensile strength. There are also standard test methods to prove, compare and evaluate them. Since 1985, research institutions such as PVRC and the American Chemical Industry Material Technology Institute (MTI) have successively conducted a series of researches on the long-term performance and operational safety of non-asbestos gasket materials, methods and devices. In 1993, German MPA and France CETIM also proposed a three-year plan for 'non-asbestos gasket material for bolt flange connectionMarchand, Dereime, Bazergui, etc. established the relationship between the fire-based aging parameter Mp) and the long-term performance of non-asbestos gaskets, as well as the heat endurance curve to estimate the expected working life or -•fixed if • given operating overflow Maximum operating temperature under service life.　　200.html,

The research and development of mechanical seals have shown two main directions (1) 　　The composition and working principle of mechanical seals