1), installation location, height, import and export direction must meet the design requirements, the connection should be firm and tight.
2), installed in the insulation pipe of various types of manual valves, the handle must not be down.
3), the valve must be installed before the appearance of inspection, valve nameplate should conform to the current national standard "general valve mark" GB 12220 provisions. For valves with working pressure greater than 1.0 MPa and cutting off on the main pipe, the strength and tightness test should be carried out before installation, and the qualified rear shall be used. 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 the tightness test, the test pressure is 1.1 times times the nominal pressure, and the test pressure should meet the GB 50243 standard requirement in the duration of the test, and the disc sealing surface is qualified without leakage.
4), handwheel, handle and transmission mechanism are not allowed to be used for lifting, no collision is strictly prohibited.
5), with the transmission mechanism of the gate valve, in accordance with the provisions of the product instruction manual installation.