The diaphragm valve, structurally different from the general valve, is a special type of shut-off valve. Its opening and closing member is a diaphragm made of soft material (elastic, corrosion-resistant, non-permeable material such as rubber and plastic), which separates the valve body cavity from the bonnet cavity and the driving member. Diaphragm valves can be used for low pressure, low temperature, corrosive and suspended materials. They have the advantage of simple structure, good sealing and anti-corrosion performance, and low fluid resistance, so it is widely used in various fields. Diaphragm Valve Classification -According to the structure, there are ridge type, cut-off type, ram type, etc.; -According to the driving method,…