In the fluid system, the valve is used to control the direction, pressure and flow of the fluid. In the process of construction, the quality of valve installation directly affects the normal operation in the future, so it must be highly valued by the construction unit and production unit.

The valve shall be installed in accordance with the valve operation manual and relevant regulations. In the process of construction, careful inspection and construction shall be carried out. Before the installation of the valve, the installation shall be conducted after the pressure test is qualified. Carefully check whether the specification and model of the valve are consistent with the drawing, check whether all parts of the valve are in good condition, whether the opening and closing valve can rotate freely, whether the sealing surface is damaged, etc. after confirmation, the installation can be conducted.

When the valve is installed, the operating mechanism of the valve should be about 1.2m away from the operating ground, which should be flush with the chest. When the center of the valve and the handwheel are more than 1.8m away from the operation ground, the operation platform shall be set for the valve and safety valve with more operation. For pipelines with many valves, the valves shall be concentrated on the platform as much as possible for easy operation.

For single valve over 1.8m and infrequently operated, equipment such as chain wheel, extension rod, movable platform and movable ladder can be used. When the valve is installed below the operation surface, the extension rod shall be set, and the ground valve shall be set with the ground well. For the sake of safety, the ground well shall be capped.

For the valve stem on the horizontal pipeline, it is better to vertically upward, rather than downward installation of the valve stem. The valve stem is installed downward, which is inconvenient for operation and maintenance, and easy to corrode the valve. The landing valve shall not be installed askew to avoid inconvenient operation.

The valves on the side-by-side pipeline shall have space for operation, maintenance and disassembly. The clear distance between the handwheels shall not be less than 100mm. If the pipe distance is narrow, the valves shall be staggered.

For valves with large opening force, low strength, high brittleness and heavy weight, valve support valve shall be set before installation to reduce starting stress.

When installing the valve, pipe tongs shall be used for the pipes close to the valve, while ordinary spanners shall be used for the valve itself. At the same time, during installation, the valve shall be in a semi closed state to prevent rotation and deformation of the valve.

The correct installation of the valve shall make the internal structure form conform to the flow direction of the medium, and the installation form conform to the special requirements and operation requirements of the valve structure. In special cases, pay attention to the installation of valves with medium flow requirements according to the requirements of process pipeline. The arrangement of the valve shall be convenient and reasonable, and the operator shall be easy to access the valve. For the lift stem valve, the operating space shall be reserved, and the valve stems of all valves shall be installed upward as far as possible and perpendicular to the pipeline.