1) installation location, height, import and export direction must meet the design requirements, threaded connection should be firmly tight.
2) All kinds of manual valves installed on the insulation pipe, the handle must not be down. 3) Valve installation must be carried out appearance inspection, Valve nameplate should conform to the current national standard "general valve mark" GB 12220 provisions. For valves with a working pressure greater than 1.0 MPa and a cut off on the trunk pipe, strength and sealing tests shall be carried out before installation and will be used before they are qualified. Strength test, the test pressure is 1.5 times times the nominal pressure, the duration of not less than 5min, valve shell, filler should be no leakage for the qualified.
When sealing test, the test pressure is 1.1 times times the nominal pressure, the test pressure test duration should meet the jb/t 9092 standard requirements, to the disc sealing surface without leakage as qualified.
4) The valve flange and the pipeline flange are fitted with gaskets according to the piping design requirements.
5) ball valve with transmission mechanism, according to the provisions of the product instruction manual installation.