Basic Types and Main Functions of Electric Valves

Electric valves can be divided into switching electric valves and regulating electric valves according to valve position function; electric ball valves and electric butterfly valves according to valve position form; ordinary electric valves and micro electric valves according to valve body shape. Electric valves are usually switching type, but also adjustable type, such as: fan intake pipe to adjust water flow, etc. Switch-type electric valves are generally divided into two types: normal closed and normal open. Normally closed means that the valve is closed when the power is cut off. Normally open means that the valve is open when the power is cut off. In addition, according to the wiring, there are three-wire and two-wire systems. Large caliber is mostly three-wire system, and small caliber will have two-wire and three-wire systems.

Electric valves, which are used to regulate the analog flow of liquid, gas and air duct media, are AI feedback. Electric valves can also be used as two-switch control in the control of large valves and wind systems. There can be AI feedback signal, which can be controlled by DO or AO, compared with large pipes and wind valves.