Gate valve is a common valve, according to the classification can be divided into parallel gate valve, wedge gate valve, lift gate valve, rotary gate valve, quick opening and closing gate valve, shrink gate valve, flat gate valve.
The correct installation of gate valve Note five need to know:
1 hand wheel, handle and transmission are not allowed to start lifting, and no collision.
2 double gate valve should be mounted vertically (ie stem in a vertical position, the hand wheel at the top).
3 with bypass valve gate valve should be opened before opening the bypass valve (to balance the pressure difference between import and export and reduce the opening force).
4 with the gear valve, according to the instructions of the product installation instructions.
5 if the valve often switch to use, at least once a month lubrication.
Gate valve during installation Notes:
1) the installation location, height, direction of import and export must meet the design requirements, the connection should be firm and tight.
2) installed in the insulation pipe on all types of manual valves, the handle shall not be down.
3) the appearance of the valve must be installed before the inspection, the valve nameplate should be consistent with the current national standard "General Valve Flags" GB 12220 requirements. For the working pressure is greater than 1.0 MPa and the main pipe to play the role of cut-off valve, the installation should be carried out before the intensity and tightness test, qualified after the standard use. Strength test, the test pressure of 1.5 times the nominal pressure, the duration of not less than 5min, valve housing, packing should be no leakage as qualified. Tightness test, the test pressure is 1.1 times the nominal pressure; test pressure in the test duration should be consistent with GB 50243 standard requirements, no leakage valve plate sealing as qualified.
4) hand wheel, handle and transmission mechanism are not allowed to lift, is strictly prohibited collision.
5) with the gate valve drive, according to the instructions of the product installation instructions.
In order to ensure the normal use of gate valve, as well as longer service life, please carefully install the valve above matters needing attention