The Advantages and Disadvantages of Electric Actuated ValvesBlog,Valves Study | Sep.16.2020
Electric Acuated Valve:
Valve electric actuator is mainly used in power plant or nuclear power plant, because a smooth, stable and slow process is required in high pressure water system.
The main advantages of electric actuator:
They are high stability and constant thrust that can be applied by users. The thrust generated by the maximum actuator can be as high as 225000kgf. Only hydraulic actuator can achieve this thrust, but the cost of hydraulic actuator is much higher than that of electric actuator.
The anti deviation ability of the electric actuator is very good, and the output thrust or torque is basically constant, which can overcome the unbalanced force of the medium and achieve the accurate control of process parameters, so the control accuracy is higher than that of pneumatic actuator. If equipped with a servo amplifier, it is easy to realize the exchange of positive and negative effects, and also can easily set the off signal valve position state (hold / full open/full close). When the fault occurs, it must stay in the original position, which is impossible for the pneumatic actuator. The pneumatic actuator must rely on a set of combined protection systems to realize the position protection.
The main disadvantages of electric actuator are as follows:
The structure is more complex, more prone to failure, and due to its complexity, the technical requirements for on-site maintenance personnel are relatively higher; the motor operation needs to generate heat, if the adjustment is too frequent, it is easy to cause the motor overheating, produce thermal protection, and also increase the wear of the reducer gear; in addition, the operation is slow, from the regulator output a signal to the control valve response It takes a long time to move to the corresponding position, which is not as good as pneumatic and hydraulic actuators.
Recommend electric actuator:
Electric actuated valves types:
Other Multi-turn Electric Actuator and Valves :
Suitable for gate valve, globe valve, ball valve, and butterfly valve:
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