Installation instructions and steps of wafer butterfly valve

The wafer butterfly valve is one of the most common types of valves in industrial pipelines. The structure of the clip on 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 clip on 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 generated by the valve is very small, so it has good flow control characteristics.

I、Instructions before installation of wafer butterfly valve:

1. Before installation and operation, use air to spray clean the external objects on the piping, and clean the inner surface of the piping with clean water.
2. Carefully check whether the service condition of the valve is consistent with its performance specification（ Temperature, pressure)
3. Check whether there are foreign matters on the valve channel and sealing surface, and remove them in time;
4. After unpacking, the valve should be installed in time. Do not loosen any fastening screw or nut on the valve at will;
5. The special butterfly valve flange must be used for the clip on butterfly valve.
6. Electric butterfly valve can be installed in any angle of the pipeline, in order to facilitate maintenance, it is recommended not to install upside down.
7. During the installation of butterfly valve flange, the flange surface and sealing rubber must be aligned, the screws must be tightened evenly, and the sealing surface must fit completely; If the screw tightening force is not uniform, there will be rubber bulge stuck butterfly plate, or against the butterfly plate, resulting in stem leakage.

II、Installation steps of wafer butterfly valve

The correct installation of the clip on butterfly valve is related to the sealing degree of the butterfly valve and whether it will leak, including the safety in the operation of condition I. users should understand the installation process.

1. Place the valve between the two pre installed flanges and pay attention to the alignment of 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. The flange is fixed on the pipe by spot welding;
4. Remove the 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 valve position and tighten the four pairs of bolts (be careful not to over tighten them);
8. The grid valve is opened to ensure that the valve plate can open and close freely, and then the valve plate is slightly opened;
9. Cross evenly tighten all nuts;
10. Confirm that the valve can be opened and closed freely. Note: make sure that the valve plate does not touch the pipeline.