Forged steel gate valve installation instructions: 1, installed in the insulation pipe on all types of manual valves, the handle shall not be down. 2, the installation location, height, direction of import and export must meet the design requirements, the connection should be strong and tight. 3, the valve must be installed before the appearance of inspection, the valve nameplate should be consistent with the existing national standard "General Valve Flags" GB 12220 requirements. For the working pressure is greater than 1.0 MPa and the main pipe to play the role of cut-off valve, the installation should be carried out before the intensity and tightness test, qualified after the standard use. Strength test, the test pressure of 1.5 times the nominal pressure, the duration of not less than 5min, valve housing, packing should be no leakage as qualified. Tightness test, the test pressure is 1.1 times the nominal pressure; test pressure in the test duration should be consistent with GB 50243 standard requirements, no leakage valve plate sealing as qualified.