You know that steam regulating valve tightly sealed cover feature and principle? Regulating valve seal characteristic principle is very simple, actually is divided into two categories, forced sealing and the tightly sealed, but just because of these two kinds of let you don't know, today is what the steam control valve from the principle of tight sealed cover
1, steam regulating valve flange bolt in the sealed tight, impose pressure on sealing gaskets, gasket of preloaded by tightening, sealing surface rough micro gap fill up, thus blocking the medium leakage, form the initial seal conditions a seal surface forming preloaded pressure, when the medium pressure rise and the operating valve, sealing preloaded pressure drop, on the surface of the gasket springback, mandatory typical structure is flat gasket seal, seal gasket seal around and tooth gasket seal, etc., are normally used for low pressure, medium and small diameter steam regulating valve,
2, steam regulating valve tightly sealed booster ago, tighten bolt first, make the cover up, make the cover and the wedge between gasket and between the body and wedge gasket initial preloaded on the surface of the sealing conditions of a sealing pressure, when the medium pressure rises, the cover by medium pressure, moving up, steam regulating valve cover with the wedge between the gasket and the body and wedge gasket sealing pressure ratio, along with the adding of pressure increase step by step, should be emphasized: since the tight sealing, medium pressure tend to add pre tight sealing pressure, add the sealing performance, medium pressure is higher, the work of sealing pressure is, the greater the sealing performance, the better, on the basis of the feature, since the tight seal as high-pressure sealing technology, commonly used in high temperature, high pressure, large diameter regulator,