Key considerations for valve actuator selection (2)

Key considerations for valve actuator selection (2)

1. Choose electric actuator according to valve type

There are quite a few types of valves, and their working principles are not the same. Generally, the opening and closing control is realized by rotating the angle of the valve plate, and the high-temperature solenoid valve lifting valve plate. When matching with an electric actuator, first choose electric execution according to the type of valve Device.

1. Rotary electric actuator (angle of rotation <360 degrees)

The rotation of the output shaft of the electric actuator is less than one circle, that is, less than 360 degrees. The color quartz tube level gauge usually achieves the valve opening and closing process control at 90 degrees. This kind of electric actuator is divided into direct connection type and base crank type according to the different installation interface methods.

a) Direct connection type: refers to the form in which the output shaft of the electric actuator is directly connected to the valve stem.

b) Base crank type: refers to the form in which the output shaft is connected to the valve stem through a crank.

This type of electric actuator is suitable for butterfly valves, ball valves, plug valves, etc.

2. Multi-turn electric actuator (angle of rotation> 360 degrees)

The rotation of the output shaft of the electric actuator is more than one circle, that is, more than 360 degrees. Generally, it takes more than one circle to realize the valve opening and closing process control.

Multifunctional electric actuators This type of electric actuators are suitable for gate valves, globe valves, etc.

3. Linear electric actuator (linear motion)

The motion of the output shaft of the electric actuator is linear motion, not rotating.

This type of electric actuator is suitable for single-seat control valves, double-seat control valves, etc.

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