1), the installation position, altitude, direction of imports and exports must meet the design requirements, the connection should be firmly tight. Butterfly Works Figure 2), is mounted on various types of pipe insulation manual valve handle shall not be down. 3), must be visually inspected prior to installation of the valve, the valve plate should be consistent with the provisions of GB 12220 of the existing national standards, "Universal Valve logo." For working pressure greater than 1.0 MPa and the role played off valve in the main pipe, the installation should be the strength and rigorous performance tests Tanggu valve supply, passing behind the prospective use. Strength test, the test pressure is 1.5 times the nominal duration of not less than 5min, the valve housing, packing should be no leakage in compliance. Tightness test, the test pressure of 1.1 times the nominal pressure; test pressure in the test duration should be consistent with GB 50243 standards, with the valve sealing surface leakage in compliance. High performance three eccentric hard sealing butterfly valve, characterized in that: the valve seat ring by a soft T-shaped sealing ring on both sides multilayer stainless steel sheet. The sealing surface of the valve plate and valve seat for the oblique cone structure Tanggu valve sales, in the valve plate oblique cone surfacing temperature, corrosion resistant alloy materials; fixed regulation of the spring between the platen and the platen ring bolt assembly structure in the regulation . This structure effectively compensate for tolerance between the sleeve and the valve stem and the elastic deformation under media pressure, the valve sealing problems in the course of transmission medium in the presence of two-way exchange. Use of soft T-type multi-layer stainless steel sheet on both sides of the valve seal Tanggu, has the dual advantages of metal seal and soft seal, both at low and high temperatures, all with zero leakage sealing performance. Tanggu Tanggu valve valve Outlet _ _ Ming Huizhou Port valve by valve, the Hong Kong Science and Technology Co., Ltd. of Dongguan. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead valve and you work out of Hong Kong into the brilliant, for a better future!