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What is a pneumatic actuator?


Release time:

2022-01-15

Today by Xinming automatic control valve industry to introduce to youPneumatic actuatorIs what. Pneumatic actuator is driven by air pressure opening and closing or regulating valve actuator, also known as pneumatic actuator or pneumatic device, but generally known as the pneumatic head. Pneumatic actuators are sometimes equipped with certain auxiliary devices. Commonly used valve positioner and handwheel mechanism.

What is a pneumatic actuator?

Today by Xinming automatic control valve industry to introduce to youPneumatic actuatorIs what.
Pneumatic actuator is driven by air pressure opening and closing or regulating valve actuator, also known as pneumatic actuator or pneumatic device, but generally known as the pneumatic head. Pneumatic actuators are sometimes equipped with certain auxiliary devices. Commonly used valve positioner and handwheel mechanism. The role of the valve positioner is to use the feedback principle to improve the performance of the actuator, so that the actuator can be controlled by the controller signal to achieve accurate positioning. The function of the handwheel mechanism is to directly manipulate the control valve when the control system is due to power failure, gas failure, no output of the controller or failure of the actuator, so as to maintain the normal production. When compressed air enters the pneumatic actuator from the nozzle, the gas pushes the double pistons to move linearly to both ends (cylinder head end). The rack on the piston drives the gear on the rotating shaft to rotate 90 degrees counterclockwise, and the valve is opened. At this time, the gas at both ends of the pneumatic actuator valve is discharged with the B nozzle. Conversely, when compressed air enters the two ends of the pneumatic actuator from the B official nozzle, the gas pushes the double plug to move linearly in the middle, and the rack on the piston drives the gear on the rotating shaft to rotate 90 degrees clockwise, and the valve is closed. When compressed air enters the pneumatic actuator from the nozzle, the gas pushes the double pistons to move linearly to both ends (cylinder head end). The rack on the piston drives the gear on the rotating shaft to rotate 90 degrees counterclockwise, and the valve is opened. At this time, the gas at both ends of the pneumatic actuator valve is discharged with the B nozzle. Conversely, when compressed air enters the two ends of the pneumatic actuator from the B official nozzle, the gas pushes the double plug to move linearly in the middle, and the rack on the piston drives the gear on the rotating shaft to rotate 90 degrees clockwise, and the valve is closed. At this time, the gas in the middle of the pneumatic actuator is discharged with the nozzle A. The above is the standard transmission principle. According to user needs, pneumatic actuators can be installed with the standard type of the opposite transmission principle, that is, the selected axis clockwise rotation to open the valve, counterclockwise rotation to close the valve. Single-acting (spring return type) pneumatic actuator nozzle A is the air inlet and nozzle B is the exhaust hole (nozzle B should be equipped with muffler). The air intake of the nozzle is an open valve, and the valve is closed by spring force when the air is cut off.
       Pneumatic actuatorAdvantage to accept continuous gas signal, the output of linear displacement (power/gas conversion device, can also accept continuous electrical signals), some with the rocker arm, can output angular displacement. There are positive and reverse functions, 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 maintained after the gas source is interrupted (it can be maintained after the retaining valve is added). It is inconvenient to realize segmented control and program control, simple maintenance, good adaptability to the environment, large output power, and explosion-proof function.
Above is the Xinming automatic control valve industry to introduce the relevant content.


 

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