PQ340F / H / Y Horizontal PQ double eccentric eccentric half ball half ball is in absorbing foreign advanced technology and research and development of successful new products, but also fill the blank valve variety of innovative products. Appraisal concluded that: in some aspects of the use of performance better than gate valves, globe valves and ball valves and other similar products. Used in petroleum, chemical, power and metallurgical industries, the core technology is a national initiative, he designed a unique, innovative structure, the product on the market since, by the customer's approval. First, the valve fouling eccentric deed tight principle, to pass through the East Gate tight organization, regulation, closed purpose. Metal face seals in the sphere are hard surface in contact with the sealing ring. Double eccentric fouling the ball valve is in the open hidden in the valve chamber, flow area is large, and the valve will not be washed, no flow resistance. When closed, the spool is not scouring, closing the valve seat spherical progressive along with cutting function effectively cut scaling obstacles, to achieve a reliable seal. Particularly easy to scale medium conveyance particularly effective. Second, dual hemispherical valve metal, in the sphere welding different alloys, alloys with a corresponding valve seat, the special treatment, the sealing surface combined into various types of corrosion, wear resistance, high temperature, etc., to meet different occasion demands. Third, the sealing surface tight, transportation of hazardous gases up to zero leakage. The fourth feature, the seat on the ball to leave the compensation amount, when the seat wear, when you close and then turn a little, still a reliable seal and prolong life. In addition, users will be a pressure plate bolts off, re-adjust or replace the seat post can still be used, to avoid a large valve sealing failure to integrate drawbacks scrapped according to user needs welding different alloys, bi-metal seals can be used for anti-optional wear, corrosion resistance, high temperature and other demanding sealing but different industrial sectors.