At present, there are dozens of manufacturers of electric control valve actuators in China, but they are at a lower level in terms of control accuracy, intelligence level and safety performance. Compared with foreign countries, the varieties and specifications are relatively single, and there is no serialization. In addition, explosion-proof, nuclear grade products and products in special environments basically all need to be imported from abroad.

Secondly, attention should be paid to the material when selecting electric butterfly valves. The main materials are cast iron, cast steel and stainless steel. These materials all have their own advantages and disadvantages. They must be cast iron. Such products are relatively easy to rust. In the process of use, with the increasing age, such products will corrode with thick lines. In general, the service life is relatively short, so many people do not like this material very much, because people do not want to choose this material products. This has a great impact on oneself.