Diaphragm pump is a new type of conveying machinery, which is currently the most innovative type of pump in China, using compressed air as the power source. For all kinds of corrosive liquids, liquids with particles, high viscosity, volatile, flammable and highly toxic liquids, they can be exhausted. Diaphragm pumps have been used in petroleum, chemical, non-ferrous metal food, electronics, ceramics, textiles and other industries. They are installed in various special occasions to extract various media that cannot be pumped by conventional pumps. As an industrial control equipment, D32 frequency converter has a wide range of applications in diaphragm pumps.