the first actuator is used in the process industry will motor installed on the industrial valves. The electric actuator has been used since 1920. Since the initial years, this structure has been significantly improved, especially in terms of performance, reliability, and size. In basic terms, electric actuators by reversible motor, control box, gear box, limit switches and other control components ( Potentiometer is the location of the valve, for instance) Composition.

electric actuators are mainly used in power plant or nuclear power plant, because of the high pressure water system needs a smooth, steady and slow.

the main advantage of electric actuators is the degree of stability and the user can be used the constant thrust. In a word, electric actuators thrust capacity depends on the size of the motor and gear are involved. Can produce the largest motor torque values can be high to 50000 lb ( 22000 kgf) The linear thrust. Only can be compared with other thrust let k actuator is electro-hydraulic actuator, but the cost of the electric actuator is very low.

electric actuator deviates from the resistance is very good, this is because the electric actuators are no gas compressibility. Electric actuators is another additional advantage in situ failure is due to the interruption of electricity power supply, water and pneumatic actuators in situ failure requires a complex system. Because they don't need fluid ( Such as air or hydraulic) To drive electric actuators, so discharge slide and pipeline cost is not a problem.

electric actuator fault is its cost and more universal heritage adopt pneumatic actuators in comparison is more expensive. At the same time it is a complex combination of parts, including a motor and gear box, electric control, so are more likely to happen malfunction. Unless we will strictly conform to the requirements of the explosion-proof, motor has no influence to the flammable environment. When the special working condition of industrial valves require greater thrust, torque and electric actuators are really is too big and too expensive, and that is very difficult to remove the actuator from the valve. According to the gear ratio and process pressure, relating to electric actuators and electric hydraulic actuators or pneumatic actuators, its action is likely to be slow. Electric actuator can produce heat, which in a closed place can be a problem. If you don't accurate torque and limit switches installation, force of actuator can be easily damage the Industrial Valves regulating elements.

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