Then we will introduce the installation and maintenance of pneumatic butterfly valve: when installing, the valve disc needs to stop at the closed position; The opening position shall be determined according to the rotation angle of the disc plate; If there is a butterfly valve with bypass valve, it is necessary to open the bypass valve before opening it; At the same time, pneumatic butterfly valves should also be installed according to the manufacturer's installation instructions. Some heavier butterfly valves should also be set firmly. For these maintenance and installation problems, if you are an old hand to install them, you can certainly avoid many problems. However, it is hard for novices to say, because they have no experience in installation and maintenance, it is entirely possible to have some wrong installation during the installation process. 　　　　

7. The metal sealed electric butterfly valve is not suitable for installation at the end of the pipeline. If it must be installed at the end of the pipeline, the outlet flange shall be equipped to prevent the seal ring from overstocking and over positioning.