1), installation position, 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 downward.
3), the valve must be installed before the appearance of inspection, the valve nameplate should comply with the current national standard "general valve mark" GB 12220 provisions. For working pressure greater than 1.0 MPa and in the main pipe to play the role of the valve, the installation should be carried out before the strength and tightness test, qualified rear quasi-use. 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 qualified.Tightness test, the test pressure is 1.1 times times the nominal pressure, the test pressure in the test duration should be in accordance with GB 50243 standard requirements, the valve disc sealing surface without leakage as qualified.
4), handwheel, handle and transmission mechanism are not allowed to be used for lifting, is strictly forbidden collision.
5), with the transmission mechanism of the gate valve, according to the provisions of the use of the product installation.
