1. Clean the sealing surface of the butterfly valve and the dirt in the pipeline.
2. The inner port of the flange on the pipeline must be aligned and press the rubber sealing ring of the butterfly valve without using a sealing gasket.
Note: If the inner port of the flange deviates from the rubber sealing ring of the butterfly valve, there will be water leakage from the valve stem or other external leakage.
3. Before fixing the valve, switch the valve plate several times to ensure that there is no jamming phenomenon before fully tightening the fixing nut.
Note: If there is jamming, the butterfly valve will not be able to be fully opened or closed, and the valve stem will be twisted and deformed by the actuator of the electric or pneumatic valve.
4. It is strictly forbidden to install the butterfly valve and then weld the flange, otherwise the rubber sealing ring of the butterfly valve will be burned.
5. When replacing the lower part of the electric or pneumatic butterfly valve, it must be assembled from the closed position to the closed position and the open position to the open position. After the whole machine is adjusted, it is installed on the pipeline.
Post time: Nov-10-2022