Ball valve sealing deputy ( The valve seat sealing surface and sphere seal face) Material matching for metal to metal ball valve. In the form of the structure of ball valve floating ball type and fixed type, connection form for flange connection, welding connection and screw thread connection. Hard seal ball valve include: ball, seat and body; The seat of the products is metal materials; In the seat and the body was placed in turn; the sealing ring, clamping ring, disc springs The beneficial effect of this product are: making ball valve greatly broaden the use range, can be used in high temperature and high pressure, or medium containing granular objects under the condition of. The construction, installation, points 1) , installation location, altitude, direction must comply with the design requirements of imports and exports, connection should be firmly connected. 2) And all kinds of manual valves installed on the thermal insulation pipe, handle shall not down. 3) And a visual inspection must be conducted before installation of valve, the valve nameplate should be consistent with existing national standards 'universal signal valve' GB 12220. For the working pressure is greater than 1. 0 MPa and the valve with the function of cutting off on ZhuGanGuan, strength and strict performance test should be done before the installation, qualified rear must use. Strength test, the test pressure for the nominal pressure of 1. 5 times, duration of not less than 5 min, shell and packing shall be no leakage of valve shall be qualified. Leak test, the test pressure for the nominal pressure of 1. 1 times; The duration of the test pressure in the test should comply with the standard of GB 50243 requirements, with no leakage for qualified for valve sealing surface. 4) , Industrial Valves, flange and pipe flange gasket fitted according to the requirements of pipeline design. 5) , belt drive mechanism of ball valve, according to the regulations of the product instruction manual installation.
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