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Advantages and disadvantages of electric valves and pneumatic valves


Release time:

2022-10-08

Wuxi Xinming automatic control valve industry co., ltd. today compares the advantages and disadvantages of electric valves and pneumatic valves for you. Pneumatic valve actuators are mainly used in nuclear power plants or power plants, because high-pressure water systems require a stable, smooth and slow process. The strength of the electric actuator is a high degree of stability and the user can apply a fairly stable thrust, can reach such a large thrust as long as the hydraulic actuator, but the hydraulic actuator cost is much higher than the electric. The anti-deviation ability of the electric actuator is very good, and the output thrust or torque is basically stable, which can well overcome the unbalanced force of the medium and reach the precise control of the process parameters, so the control accuracy is higher than that of the pneumatic actuator. If the servo amplifier is equipped, it can easily realize the exchange of positive and negative effects, and it can also easily set the off signal valve position state (adhere to/fully open/fully closed). However, when there is a problem, it must stay in the original position, which is not possible for the pneumatic actuator. The pneumatic actuator must rely on a set of combined maintenance system to realize the position retention. The shortcomings of the electric actuator are: The structure is messy and simpler to cause problems, and because of its clutter, the technical requirements for on-site maintenance personnel are relatively higher. The operation of the motor needs to generate heat. If the motor is adjusted too frequently, it will simply cause the motor to overheat and generate thermal maintenance, which will also increase the wear of the reduction gear. There is also the slow operation, which takes a long time to output a signal from the regulator, to the control valve echoes and moves to the corresponding position, which is where it is not as good as pneumatic and hydraulic actuators. Valve pneumatic actuator actuator and regulator is the same as the whole, the actuator has two types of diaphragm and piston. Because of the long stroke, the piston type is suitable for occasions requiring large thrust; while the diaphragm type has a small stroke and can only directly drive the valve stem. Because the pneumatic actuator has the advantages of simple structure, stable and reliable action, large output thrust, and safety and explosion-proof, it is widely used in the production process with high safety requirements such as chemical industry, power plant, oil refining, etc. The primary advantages of pneumatic actuators are: they can accept continuous gas signals, output straight lines to generate displacements, and some can output angular displacements when equipped with rocker arms. It has positive and negative effects. The moving speed is large, but the speed will slow down when the load increases. The output force is related to the operating pressure. The reliability is high, but the valve cannot be adhered to after the gas source is interrupted. It is inconvenient to realize segmented control and program control. Maintenance is relatively simple, good adaptability to the environment; large output power; explosion-proof function. The above is the relevant content about the advantages and disadvantages of electric valves and pneumatic valves. Assuming that you have a demand for our company's products, please contact online customer service for specific inquiries, quotations and other information. You are also welcome to come to our company for inquiries and are sincerely invited to cooperate with you!

Advantages and disadvantages of electric valves and pneumatic valves

Wuxi Xinming automatic control valve industry co., ltd. today specifies the electric valve andPneumatic valvecompare the advantages and disadvantages

气动阀门

 Pneumatic valveActuators are mainly used in nuclear power plants or power plants, because high-pressure water systems require a stable, smooth and slow process. The strength of the electric actuator is a high degree of stability and the user can apply a fairly stable thrust, can reach such a large thrust as long as the hydraulic actuator, but the hydraulic actuator cost is much higher than the electric. The anti-deviation ability of the electric actuator is very good, and the output thrust or torque is basically stable, which can well overcome the unbalanced force of the medium and reach the precise control of the process parameters, so the control accuracy is higher than that of the pneumatic actuator. If the servo amplifier is equipped, it can easily realize the exchange of positive and negative effects, and it can also easily set the off signal valve position state (adhere to/fully open/fully closed). However, when there is a problem, it must stay in the original position, which is not possible for the pneumatic actuator. The pneumatic actuator must rely on a set of combined maintenance system to realize the position retention.

The shortcomings of the electric actuator are:
The structure is messy and simpler to cause problems, and because of its clutter, the technical requirements for on-site maintenance personnel are relatively higher. The operation of the motor needs to generate heat. If the motor is adjusted too frequently, it will simply cause the motor to overheat and generate thermal maintenance, which will also increase the wear of the reduction gear. There is also the slow operation, which takes a long time to output a signal from the regulator, to the control valve echoes and moves to the corresponding position, which is where it is not as good as pneumatic and hydraulic actuators.

Valve pneumatic actuator actuator and regulator is the same as the whole, the actuator has two types of diaphragm and piston. Because of the long stroke, the piston type is suitable for occasions requiring large thrust; while the diaphragm type has a small stroke and can only directly drive the valve stem. Because the pneumatic actuator has the advantages of simple structure, stable and reliable action, large output thrust, and safety and explosion-proof, it is widely used in the production process with high safety requirements such as chemical industry, power plant, oil refining, etc.

气动阀门

The primary advantages of pneumatic actuators are: they can accept continuous gas signals, output straight lines to generate displacements, and some can output angular displacements when equipped with rocker arms. It has positive and negative effects. The moving speed is large, but the speed will slow down when the load increases. The output force is related to the operating pressure. The reliability is high, but the valve cannot be adhered to after the gas source is interrupted. It is inconvenient to realize segmented control and program control. Maintenance is relatively simple, good adaptability to the environment; large output power; explosion-proof function.

The above is the relevant content about the advantages and disadvantages of electric valves and pneumatic valves. Assuming that you have a demand for our company's products, please contact online customer service for specific inquiries, quotations and other information. You are also welcome to come to our company for inquiries and are sincerely invited to cooperate with you!