1, installation position, height, import and export direction must meet the design requirements, the connection should be strong and tight.
2, installed in the insulation pipe on various types of manual valves, handle can not be downward. 3), the valve must be installed before the appearance inspection, Valve nameplate should be in line with the current national standards, "general valve Mark" GB 12220 of the provisions. For the work pressure is greater than 1.0 MPa and in the main tube to play a cut-off valve, the installation should be carried out before the strength and tightness test, qualified to use the rear. Strength test, the test pressure of 1.5 times times the nominal pressure, duration of not less than 5min, valve housing, fillers should be no leakage for qualified.
In the tightness test, the test pressure is 1.1 times times of the nominal pressure, the test pressure should meet the GB 50243 standard in the test, and the valve seal face without leakage is qualified.
4, Handwheel, handle and drive mechanism are not allowed for lifting, no collision. 5), with the transmission mechanism of the gate valve, according to the specifications of the product installation.