Important factors affecting sealing gasket selection

The choice of gasket material is not an easy job. In the presence of flange connection space variable seems to be endless. All these uncertain factors will affect the gasket sealing effect. The past 'TAMP' these parameters seem to have enough, but today, the flange of the processing quality, bolt wire embedded teeth quantity, flange, bolt tensioning amount rotation, medium filling agent and flange surface treatment ( There are many other factors) All affect the gasket sealing effect. Gasket pressure performance is weakened with the increase of the thickness of the material, material is qualitative the thinner, the greater the pressure on the bearing. In addition, the proper bolt load order can ensure a balanced bearing pressure. When the temperature, pressure and PT values are under proper conditions, can have very good sealing gasket. Any type of gaskets, use in harsh environment, to ensure the effective seal for a long time, must meet the following eight important features: for gasket for medium sealing systems, gasket in references within a certain time of the working temperature and pressure are leaking. Compressibility of gaskets gasket and the contact surface of flange connecting bolts, should coincide well, to ensure the seal. Creep resistance of gasket gasket under the influence of pressure load and temperature, the creep resistance should be better, otherwise back to bolt torque loss, leading to the surface of the gasket stress is reduced, thereby car-scrapping system leaks. Gasket selected for chemical resistance of the gasket should not affected by the corrosion of chemical medium, and are not contaminated medium. Gasket resilience even under the conditions for the robust stability of the system, the two connecting flange due to the influence of temperature and pressure will surely exist small displacement, elastic function should be able to make up for the displacement of the gasket to ensure the tightness of the system. Uf resistance of gaskets gasket after use should be able to easily removed from the flange, not adhesive gasket non-corrosive gasket deal with connection of the flange surface no corrosive. Gasket selected for the temperature resistance of the gasket should guarantee the system low temperature and high temperature under normal use.