Wafer type butterfly valve is one of the most common valve types in industrial pipeline. The wafer type butterfly valve has a relatively small structure. It only needs to 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 type butterfly valve to control the fluid medium in the pipeline. The wafer type butterfly valve is especially suitable for places with narrow space or short distance between pipes. 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.
Therefore, the pressure drop generated by the valve is very small, so it has better flow control characteristics. I. instructions before installation of wafer butterfly valve: 1. Before installation, use air spray to clean the external objects on the piping, and clean the internal surface of the piping with clean water. 2. Carefully check whether the service condition of the valve is consistent with its performance specification; (temperature and pressure) 3. Check whether there are sundries in the valve channel and sealing surface, and remove them in time; 4. Install the valve in time after opening the box, and do not loosen any fastening screws or nuts on the valve at will; 5. Special butterfly valve flange must be used for wafer butterfly valve. 6. The electric butterfly valve can be installed on any angle of pipeline. For the convenience of maintenance, it is recommended not to install it upside down. 7. During the installation of butterfly valve flange plate, the flange surface and sealing rubber must be aligned, the screws shall be tightened evenly, and the sealing surface must be fitted completely; if the screw tightening force is uneven, the rubber bulge will appear to block the butterfly plate, or the butterfly plate will be countered to cause leakage at the valve rod. II. Installation steps of clip on butterfly valve: the correct installation of clip on butterfly valve is related to the sealing degree of butterfly valve and whether it will leak, including the safety in working conditions. Users should understand the installation process. 1. As shown in, 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 slightly, and tighten the nuts slightly to correct the flatness of the flange surface; 3. Fix the flange on the pipe by spot welding; 4. Remove the valve; 5. Fix the flange on the pipe completely by welding; 6. Install the valve after the weld joint cools down. Ensure that the valve has enough moving space in the flange to prevent the valve from being damaged, and ensure that the valve plate has a certain degree of opening; 7. Correct the valve position and tighten four pairs of bolts, (pay attention not to over tighten) 8. Open the valve to ensure that the valve plate can open and close freely, and then slightly open the valve plate; 9. Tighten all nuts in cross balance; 10. Reconfirm that the valve can open and close freely.
Note: make sure that the valve plate does not touch the pipeline. For the installation of clip on butterfly valve, it must be placed horizontally before installation. Remember not to bump at will. After it is drawn into the installation length during installation, it is not allowed to dismantle the clip on butterfly valve at will without special permission in the field pipeline design. This is what 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, the butterfly valve needs to be laid along the line, making a bracket for the wafer butterfly valve, and once the bracket is made, it is strictly prohibited to remove the bracket when it is used.