?Gasket Selection

??Any type of gasket want to use in very harsh environments to ensure the effective seal can be a long, must have the following eight features:

??1) tightness gaskets: the sealing system for a medium, the gasket in the recommended temperature and pressure a predetermined time does not leak.

??2) compressible gasket: Gasket and contact surfaces in the connection bolt, should fit well in order to ensure the seal.

??3) gasket creep resistance: load washer under the influence of pressure and temperature, and creep should be better, otherwise it will cause the bolt torque loss, resulting in surface stress gasket is reduced, causing the system leakage.

??4) Gasket chemical resistance: the choice of the gasket should not be corrosive chemical media, and not contaminate the media.

??5) gasket resilience: even under the condition of stability of the system, due to the influence of temperature and pressure will certainly be in the tiny village of displacement, gasket elasticity transport should be able to compensate for this displacement, in order to ensure tightness of the system.

??6) anti-bonding of the gasket: the gasket after use should be easy to dismantle, not bonding.

??7) non-corrosive gasket: the gasket surface to deal with non-corrosive connection.

??8) temperature resistant gasket: the gasket should be chosen to ensure the normal use at the lowest temperature and the highest temperature of the system.