Sealing pad

2.1 Overview
  Cushion seal is widely used in piping, pressure vessels, and the combination of a variety of shell in the static seal surface. There are non-metallic gasket sealing pad, a combination of non-metallic gaskets and metal gaskets and metal three categories. The commonly used materials are rubber, leather, asbestos, cork, PTFE, steel, iron, copper and stainless steel.

  Cushion seal leaks in three forms: interface leakage, infiltration and destructive leak leak. Both of them before the main form.
cable tray manufacturers, cable tray fittings, metal cable trays
  2.2 Selection of seals
  Gasket selection principle is that, for less demanding situations, can be empirically selected, and then replaced when the sub-city. But for those demanding applications, such as explosive, poisonous and highly corrosive and combustible liquid gas equipment, reaction vessels and pipeline systems, should be based on working pressure, operating temperature, seal
 Flange surface roughness. Flange sealing surface roughness effects on the great impact, especially when using non-soft gasket, sealing the surface roughness of the large degree of value one of the main cause of leaks. For example, turning the knife flange pattern is the spiral, metal gasket, if the roughness is large, it can not block the knife spacer pattern formed by this spiral groove, under pressure, the media will shun This trench was leaked. Soft gasket on the flange surface clean of low demand, and this is because it is easily deformed, can block the processing knife pattern, thus preventing leakage. For soft gasket, flange surface is too smooth detriment, because the leakage resistance of the interface occurs at this time smaller. Therefore, the gasket is different from the requirements of the flange surface roughness is not the same.