Introduction:
JIS butterfly valve of the main structure characteristics of wafer and flange three eccentricity seal form, use elastic seal and soft hard seat sealing compatible multi-level seal two structures, the sealing performance and reliable, to ensure that the open does not contact seal seat when the butterfly plate, eliminates the seal seat non-uniform load, prolong the service life, ensure reliable sealing performance. It has the advantages of high temperature resistance, wear resistance and corrosion resistance. Widely used in petroleum, chemical and ship pipelines.