1), the installation position, altitude, direction must meet the design requirements of the import and export of Tianjin Valve Co., Ltd., the connection should be firmly tight. Butterfly Works Figure 2), mounted on various types of pipe insulation manual valve handle shall not be down. 3), must be visually checked before the valve is installed, the valve plate should comply with the provisions of the current national standard GB 12220 "Universal Valve logo." For working pressure greater than 1.0 MPa and the role played off valve in the main pipe Tianjin power brand valves, installation should be carried out before the strength and rigorous performance tests, passing behind the prospective use. Strength test valves, test pressure of 1.5 times the nominal duration of not less than 5min, the valve housing, packing should be no leakage as qualified. Tightness test, the test pressure of 1.1 times the nominal; test pressure in the test duration should be consistent with GB 50243 standards, with no leakage valve sealing surface is qualified. Electric actuator output torque valve operation should be 1.2-1.5 times the maximum torque. Electric butterfly valve operating thrust: the host structure electric valve actuators in two ways: one is not configured thrust plate. Output torque through the thrust plate stem nut is converted to output thrust. Direct output torque; the other is configured thrust plate. Output shaft rotation number: How many electric valve actuators and valve output shaft rotation number of the nominal diameter, stem pitch, thread the first few related. H is the valve opening height, according to M = HZS computing (M for electrical installations should meet the total number of turns .S to stem transmission thread pitch, Z for the first few stem threads. Gassy and ultra Tianjin Tanggu Valve Co., Ltd., Ming Port Valve (certified), the valve is provided by Dongguan Ming Port Valve Technology Co., Ltd., Dongguan Ming Port Valve (www.gdmgfm.com) is Dongguan, butterfly leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the next port of the valve leading the staff warmly welcome all inquiries negotiations to create the next port of the valve a better future.