Gate valve installation features and precautions

1) The installation position, height, and direction of import and export must meet the design requirements, and the connection should be firm and tight.

2) For all kinds of manual valves installed on the thermal insulation pipeline, the handle shall not be downward.

3) Visual inspection must be carried out before the valve is installed, and the nameplate of the valve should comply with the current national standard “General Valve Mark” GB 12220. For valves with a working pressure greater than 1.0 MPa and the function of cutting off the main pipe, the strength and tightness performance test should be carried out before installation, and the valve can be used only after passing the test. During the strength test, the test pressure is 1.5 times the nominal pressure, and the duration is not less than 5 minutes. The valve shell and packing should be qualified without leakage. During the tightness test, the test pressure is 1.1 times the nominal pressure; the test pressure should meet the requirements of the GB 50243 standard for the duration of the test, and the sealing surface of the valve disc is qualified if there is no leakage.

4) The handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.

5) The gate valve with transmission mechanism shall be installed according to the provisions of the product instruction manual.

1. The handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.

2. The double gate gate valve should be installed vertically (that is, the valve stem is in the vertical position and the handwheel is at the top).

3. The gate valve with the bypass valve should open the bypass valve before opening (to balance the pressure difference between the inlet and outlet and reduce the opening force).

4. The gate valve with transmission mechanism shall be installed according to the provisions of the product instruction manual.

5. If the valve is frequently switched on and off, lubricate it at least once a month.

6. The gate valve is only used to fully open and fully close the medium on various pipelines or equipment, and is not allowed to be used for throttling.

7. For gate valves with handwheels or handles, auxiliary levers should not be added during operation (if the sealing is not tight, the sealing surface or other parts should be checked and repaired). Turn the handwheel and handle clockwise to close, and vice versa. The gate valve with transmission mechanism should be used in accordance with the stipulations in the product instruction manual.