2020-08-18 Sanitary butterfly valve is widely used in various fields, its main function is flow regulation. Due to the large pressure loss of sanitary butterfly valve in the pipeline, the firmness of butterfly plate bearing pipeline medium pressure should be considered when closing. In addition, the working temperature limit of resilient seat material at high temperature must be considered. The structure length and overall height of sanitary butterfly valve is small, the opening and closing speed is fast, and it has good fluid control characteristics, so the structure principle of sanitary butterfly valve is most suitable for making large diameter valve. It is necessary to know what kinds of failure the sanitary butterfly valve will have and how to deal with it.