1). Installation location, height, import and export direction must conform to the design requirements, the connection should be firmly and tightly.
2). All kinds of manual valves installed on the insulation pipe shall not be down.
3). The valve must be inspected before it is installed. For the work pressure is greater than 1.0MPa and in the main pipe to cut off the role of the valve, the installation should be before the strength and tightness test, qualified after the use. Strength test, the test pressure is 1.5 times times the nominal pressure, the duration is not less than 5min, valve shell, filler should be no leakage for qualified.
4). Handwheel, handle and transmission mechanism are not allowed for hoisting, no collision.
5). The gate valve with transmission mechanism shall be installed according to the specification of the product usage.