Correct installation method of wafer butterfly valve
The wafer butterfly valve is one of the most common types of valves in industrial pipelines. The structure of the wafer butterfly valve is relatively small. Just put the butterfly valve in the middle of the flanges at both ends of the pipeline, and use the stud bolt to pass through the pipeline flange and lock the wafer butterfly valve, then the fluid medium in the pipeline can be controlled. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop through the valve is very small, so it has good flow control characteristics.
The correct installation of the wafer butterfly valve is related to the sealing degree of the butterfly valve and whether it will leak, including the safety in the working condition. The user should understand the installation process.
1. Place the valve between the two pre installed flanges as shown in the figure, and pay attention to the neat alignment of the bolt holes.
2. Insert four pairs of bolts and nuts into the flange hole gently, and tighten the nuts slightly to correct the flatness of the flange surface;
3.Fix the flange to the pipe by spot welding
4. Remove valve
5.The flange is completely welded and fixed on the pipe;
6. Install the valve after the weld is cooled. Ensure that the valve has enough space in the flange to prevent the valve from being damaged, and ensure that the valve plate has a certain opening;
7. Correct the position of the valve and tighten the four pairs of bolts
8. Open the valve to ensure that the valve plate can open and close freely, and then open the valve plate slightly;
9.Cross evenly tighten all nuts;
10. Reconfirm that the valve can open and close freely. Note: make sure that the valve plate does not touch the pipe.
The installation of the wafer butterfly valve must be placed flat before installation, and remember not to bump at will. After pulling it to the installation length during installation, the wafer butterfly valve can not be disassembled without special permission in the field pipeline design, which we need to know before installation. At the same time, we also need to know that the wafer butterfly valve can be installed at any position, but after the installation of the wafer butterfly valve is completed, the butterfly valve needs to be laid along the line, and a bracket is made for the wafer butterfly valve. Once the bracket is made, it is strictly forbidden to remove the bracket when it is used.
