The thickness of head gasket leakage rate.

In the same compression load, under the same pressure of the medium, the probability of leakage is increased with the increase in the flange gasket. This is because under the same load, the flange gasket thickness has a relatively large amount of compression spring, at the beginning of the arrival of the seal under the environment, the thickness of the elastic storage trap gasket can compensate the sealing surface of the medium pressure caused by the relative dispersion of more than a thin gasket and make the residual compressive flange keep a gasket surface stress, so that the leak out. But can not be said that the thickness of the flange gasket, the better the sealing function. This is because the head gasket thickness, is not the same, the establishment of the initial sealing conditions are not the same. Due to the influence of friction on the end face, the surface of the flange gasket appears to be a state of stress of the three to the stress. The material deformation resistance is relatively large; and the flange gasket is middle gasket surface is more prone to plastic deformation, this time, the establishment of the initial seal is also more difficult, therefore, when the flange gasket thickness reaches a certain value, the sealing function of what has changed, and even better, in addition to these, the head gasket thickness, section the area of infiltration leakage is greater, so this time the flange gasket leakage rate has greater.