1) The installation position, height, and direction of import and export must meet the design requirements, and the connection should be firm and tight.
2) For all kinds of manual valves installed on the thermal insulation pipeline, the handle shall not be downward.
3) Visual inspection must be carried out before the valve is installed, and the nameplate of the valve should comply with the current national standard "General Valve Mark" GB 12220. For valves with a working pressure greater than 1.0 MPa and the function of cutting off the main pipe, the strength and tightness performance test should be carried out before installation, and the valve can be used only after passing the test. During the strength test, the test pressure is 1.5 times the nominal pressure, and the duration is not less than 5 minutes. The valve housing and packing should be qualified without leakage. During the tightness test, the test pressure is 1.1 times the nominal pressure; the test pressure should meet the requirements of the GB 50243 standard for the duration of the test, and the sealing surface of the valve disc is qualified if there is no leakage.
4) Install a gasket between the valve flange and the pipeline flange according to the pipeline design requirements.
5) The ball valve with transmission mechanism shall be installed according to the provisions of the product instruction manual.
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