Pipeline valves should pay attention to the following general provisions of installation before installation.

1. The position of the valve installation should not impede the operation, disassembly and maintenance of the equipment, the pipeline and the valve body itself, and the aesthetic appearance of the assembly should be taken into consideration.
2. The valve on the horizontal pipe, the valve stem is installed upwards, or it is installed at a certain angle. Do not install the hand wheel downward. The valves, stems and handwheels on the high-altitude pipeline can be installed horizontally, and the valve is opened and closed remotely with a chain that is vertically lower.
3. Arranged symmetrical, neat and beautiful; the valve on the riser, under the premise of the process, the valve hand wheel is the most suitable for the chest height, generally 1.0-1.2m from the ground, and the valve stem must be installed along the direction of the operator.
4. The valves on the side-by-side pipe shall have the same centerline elevation and the clearance between the handwheels shall not be less than 100mm; the valves on the side-by-side horizontal pipes shall be staggered to reduce the pipe spacing.
5. When installing heavier valves on pumps, heat exchangers, etc., valve brackets should be provided; when operating frequently and installed on valves more than 1.8m from the operating surface, a fixed operating platform should be provided.
6. The valve body has an arrow mark on the valve body, and the direction of the arrow is the flow direction of the medium. When installing the valve, care should be taken to point the arrow at the same direction as the flow in the pipe.
7. When installing the flange valve, ensure that the end faces of the two flanges are parallel and concentric with each other. Do not use double gaskets.
8. When installing a threaded valve, a threaded valve should be equipped with a union for easy disassembly. The setting of the joint should consider the convenience of maintenance. Usually, the water flow passes through the valve and then passes through the joint.