2. Forward connection (valve open);
3. Reverse gear (valve closed);
According to the valve position function, electric valves can be divided into: switching electric valves and adjusting electric valves; According to the form of valve position, it can be divided into electric ball valve and electric butterfly valve; According to the shape of the valve body, it can also be divided into: ordinary electric valve and micro electric valve. Electric valves are usually adjustable in opening and closing, such as fan inlet pipe to adjust water flow.
Switched electric valves are generally divided into normally closed and normally open. Normally closed means that the valve is closed when power is cut off, and normally open means that the valve is open when power is cut off. In addition, it can be divided into three-wire system and two-wire system according to wiring. Most of the large caliber ones are three-wire, and the small caliber ones will be two-wire and three-wire system.
Extended data:
device characteristics
Electric valve
1, which can meet the requirements of most working conditions and the working conditions that ordinary valves cannot be used;
2, both switch and adjustment functions, valve position indication and output;
3. Suitable for almost all media, the maximum viscosity is 600mm2/s (cm);
4, high temperature resistance, chemical corrosion resistance, wear resistance and durability, water hammer impact resistance;
5, with manual function, can be equipped with handwheel, explosion-proof environment actuator can be equipped with explosion-proof type;
6, bidirectional circulation, simple operation, stable control and long service life.
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