What are the Different Types of Motorized Valves?

The electric valve is simply to control the valve with an electric actuator, so as to realize the opening and closing of the valve. It can be divided into two parts, the upper part is an electric actuator and the lower part is a valve. May also be called air conditioning valve.

The electric valve is usually composed of

Electric valve can be divided according to valve position function: on-off electric valve and regulating electric valve; according to valve position form can be divided into: electric ball valve and electric butterfly valve; according to the shape of the valve body can be divided into: ordinary electric valve and miniature electric valve . The electric valve is generally a switch type, and there are also adjustable types, such as: fan inlet pipe to regulate water flow. Switch-type electric valves are generally divided into normally closed and normally open. Normally closed type refers to the valve is closed when the power is off. Normally open type is the valve is open when the power is off. In addition, the wiring is divided into three-wire and two-wire systems. Most of the large calibers are three-wire systems, and the smaller calibers will be two-wire and three-wire systems. ^[1]

The electric valve is used for the analog adjustment of the medium flow rate of liquid, gas and wind system pipelines, and it is AI feedback. In the control of large valves and wind systems, electric valves can also be used for two-position switch control. There can be AI feedback signals, which can be controlled by DO or AO, as seen in large pipes and dampers. ^[1]

The commonly used control valves in engineering are: solenoid valves and electric valves. However, they have defects in use, such as the solenoid valve is easy to be blocked by foreign objects, the water resistance is large, and long-term special maintenance is required; while the electric valve has no water resistance, but because it requires the necessary control circuit, the waterproof vapor erosion affects Service life is also a major problem that plagues promotion. ^[2]

The application fields of electric valve are: canning / bottle tank system, beer brewing and beverage technology chemical industry, fluid mixing device, food industry concrete and cement industry, vacuum technology, water treatment device, pneumatic device, laundry room, medical equipment, boiler Water supply, process control and other fields. ^[3]