1) The installation location, height and inlet and outlet direction must meet the design requirements, and the connection should be firm and tight.
2) The handle of all kinds of manual valves installed on the insulation pipe shall not be downward.
3) The valve must be inspected before installation, and the nameplate of the valve should conform to the current national standard "General Valve Marks" GB 12220. For the valve whose working pressure is greater than 1.0Mpa and which plays a cutting role on the main pipe, the strength and tight performance test should be carried out before installation, and the qualified valve can be used. When the strength test, the test pressure is 1.5 times of the nominal pressure, the duration is not less than 5min, and the valve shell and packing should be qualified without leakage. Tightness test, the test pressure is 1.1 times of the nominal pressure; The test pressure shall meet the requirements of GB 50243 standard for the duration of the test, and it is qualified if there is no leakage on the sealing surface of the valve disc.
4) Install gaskets between valve flanges and pipeline flanges according to pipeline design requirements.
5) The ball valve with transmission mechanism should be installed according to the instructions of the product.