Metal-clad asbestos mat for mechanical seal-

Metal-clad asbestos mat for mechanical seal

　2017-06-22　　

Metal-clad asbestos gasket for mechanical seal:

The asbestos board or asbestos rubber board is covered by a thin metal plate, so that it does not directly melt with the medium, avoiding the asbestos fiber strength decrease. It overcomes the leakage phenomenon, thereby expanding the use range of asbestos rubber board: general metal bag The operating temperature of asbestos mats is (in some cases, 600~700℃, such as in flue gas at atmospheric pressure -0.16MPa), and the operating pressure is 4MPa. If the pressure increases again, the gasket is prone to cross flow, and the core material is easy to build. Squeeze out the joint.

For 120 mechanical seals, as the metal-clad asbestos gasket requires a large bolt tightening force, even when the working pressure is lower than 2.45MPa, flanges below PN2.5MPa cannot be used. Otherwise, the rigidity of flanges and bolts will be insufficient, resulting in deformation and sealing failure. Some people think that if the core material is changed to synthetic rubber with better elasticity, the fastening force will decrease. In fact, it is not because after the core material is softened, the fastening force is absorbed by the core tree, and the metal plate cannot be provided on the flange surface. With the tightening force required for the upper fitting, the pad is easily squeezed out.

The metal bag can be made into various shapes, and it is widely used in various heat exchangers, large covers, loading and unloading holes, manhole flanges, etc.

A layer of flexible graphite sheet is pasted on the surface of the metal cladding gasket. Compared with similar metal cladding gaskets that are not covered on the surface, this type of gasket has a smaller preload ratio and better sealing performance.　　494.html,

Asbestos resin sheet for mechanical seal gasket and asbestos impregnated sheet 　　Metal spiral wound gasket for mechanical seal