KCB-33.3 gear pump seal selection principle is that, for the less demanding occasions, may be empirically selected, inappropriate replacement. But for those demanding applications, such as explosive, toxic and flammable gases and highly corrosive liquid equipment, reaction tanks and piping systems, etc., should be based on the working pressure, working temperature, the corrosiveness of the sealing medium and the sealing surface The form of choice. In general, in low temperature, corrosive media or vacuum conditions, should consider the special performance of the gasket. Need to explain here is the influence of the flange on the gasket selection; at room temperature and low pressure, the choice of non-metallic soft gaskets; medium pressure and high temperature, the choice of metal and nonmetal combination gaskets or metal gaskets; temperature, pressure Larger fluctuations, the choice of good or self-tight seal.