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Pneumatic actuator of valve actuator


Release time:

2022-06-30

Today, by Wuxi Xinming automatic control valve industry Co., Ltd. for you to introduce in detail the pneumatic actuator valve actuator: Pneumatic actuator is the use of gas pressure to drive the opening and closing of the valve or the implementation of the device, also known as the pneumatic executive organization or pneumatic equipment, but generally shallow called the pneumatic head. Pneumatic actuators are sometimes equipped with certain auxiliary equipment. Commonly used valve positioner and handwheel organization. The effect of the valve positioner is to use the reaction principle to improve the performance of the actuator, so that the actuator can be controlled by the controller signal to achieve accurate positioning. The effect of the handwheel organization is that when the control system is due to power failure, gas failure, no output of the controller or failure of the execution organization, it can be used to directly manipulate the control valve to maintain the normal production. Working principle When compressed air enters the pneumatic actuator from the nozzle, the gas pushes the double piston to move linearly to the two ends (cylinder head end). The rack on the piston drives the gear on the rotating shaft to roll 90 degrees counterclockwise, and the valve is opened. At this moment, 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 to the center, and the rack on the piston drives the gear on the rotating shaft to roll 90 degrees clockwise, and the valve is closed. At this moment, the gas in the center of the pneumatic actuator is discharged with the nozzle A. The above is the transmission principle of the standard type. According to user requirements, pneumatic actuators can be equipped with the opposite transmission principle of the standard type, that is, the selected axis rolling clockwise to open the valve, counterclockwise rolling to close the valve. Single effect (spring return type) pneumatic actuator nozzle A is the air inlet and nozzle B is the exhaust hole (nozzle B should be the equipment muffler). The inlet of nozzle A is an open valve, and the valve is closed by spring force when the gas is cut off. Basic composition The variety and structure of the conditioning organization of the pneumatic actuator are roughly the same, mainly the execution organization is different. Therefore, when the pneumatic actuator is introduced, it is divided into two parts: the execution organization and the conditioning valve. The pneumatic actuator is composed of two parts: the executive tissue and the conditioning valve (conditioning tissue). According to the size of the control signal, the corresponding thrust is generated to advance the regulating valve. Conditioning valve is the conditioning part of the pneumatic actuator, in the implementation of the effect of the organization of the thrust, the conditioning valve to produce a certain degree of displacement or angle, direct conditioning fluid flow. 1. Pneumatic equipment is mainly composed of cylinders, pistons, gear shafts, end covers, seals, screws, etc.; complete sets of pneumatic equipment should also include opening instructions, stroke limits, solenoid valves, positioners, pneumatic components and other components. 2. The connection size of pneumatic equipment and valve shall conform to the rules of ISO5211 (bottom), GB/T12222 and GB/T12223. 3, with manual organization of pneumatic equipment, in the gas source interruption, should be able to use its manual organization for pneumatic ball valve opening and closing operation, facing the hand wheel, hand wheel or handle should be counterclockwise rotation for the valve open, clockwise rotation for the valve off. 4. When the end of the piston rod is internal and external, there should be a wrench mouth suitable for the standard wrench. 5. The sealing ring of the piston should be easy to replace and repair. 6. For pneumatic equipment with buffer organization, the stroke length of buffer organization can refer to the rules of Table 1. 7. Pneumatic equipment with adjustable buffer organization should have the organization of the external adjustment of the buffer effect of the cylinder. The above is all the contents of the pneumatic actuator of the valve actuator introduced in detail by Wuxi Xinming automatic control valve industry co., ltd. if you have any questions about the pneumatic actuator, please feel free to call for advice and wait for your cooperation.

Pneumatic actuator of valve actuator

Today, Wuxi Xinming automatic control valve industry Co., Ltd. will give you a detailed introduction of the valve actuatorPneumatic actuator

气动执行器

Pneumatic actuatorIt is an executive device that uses air pressure to drive opening and closing or conditioning valves. It is also called pneumatic executive organization or pneumatic equipment, but it is generally called pneumatic head. Pneumatic actuators are sometimes equipped with certain auxiliary equipment. Commonly used valve positioner and handwheel organization. The effect of the valve positioner is to use the reaction principle to improve the performance of the actuator, so that the actuator can be controlled by the controller signal to achieve accurate positioning. The effect of the handwheel organization is that when the control system is due to power failure, gas failure, no output of the controller or failure of the execution organization, it can be used to directly manipulate the control valve to maintain the normal production.
Working principle
When compressed air enters the pneumatic actuator from the nozzle, the gas pushes the double piston to move linearly to the two ends (cylinder head end). The rack on the piston drives the gear on the rotating shaft to roll 90 degrees counterclockwise, and the valve is opened. At this moment, 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 to the center, and the rack on the piston drives the gear on the rotating shaft to roll 90 degrees clockwise, and the valve is closed. At this moment, the gas in the center of the pneumatic actuator is discharged with the nozzle A. The above is the transmission principle of the standard type. According to user requirements, pneumatic actuators can be equipped with the opposite transmission principle of the standard type, that is, the selected axis rolling clockwise to open the valve, counterclockwise rolling to close the valve. Single effect (spring return type) pneumatic actuator nozzle A is the air inlet and nozzle B is the exhaust hole (nozzle B should be the equipment muffler). The inlet of nozzle A is an open valve, and the valve is closed by spring force when the gas is cut off.
Basic composition
The variety and structure of the conditioning organization of the pneumatic actuator are roughly the same, mainly the execution organization is different. Therefore, when the pneumatic actuator is introduced, it is divided into two parts: the execution organization and the conditioning valve. The pneumatic actuator is composed of two parts: the executive tissue and the conditioning valve (conditioning tissue). According to the size of the control signal, the corresponding thrust is generated to advance the regulating valve. Conditioning valve is the conditioning part of the pneumatic actuator, in the implementation of the effect of the organization of the thrust, the conditioning valve to produce a certain degree of displacement or angle, direct conditioning fluid flow.




1. Pneumatic equipment is mainly composed of cylinders, pistons, gear shafts, end covers, seals, screws, etc.; complete sets of pneumatic equipment should also include opening instructions, stroke limits, solenoid valves, positioners, pneumatic components and other components.
2. The connection size of pneumatic equipment and valve shall conform to the rules of ISO5211 (bottom), GB/T12222 and GB/T12223.
3, with manual organization of pneumatic equipment, in the gas source interruption, should be able to use its manual organization for pneumatic ball valve opening and closing operation, facing the hand wheel, hand wheel or handle should be counterclockwise rotation for the valve open, clockwise rotation for the valve off.
4. When the end of the piston rod is internal and external, there should be a wrench mouth suitable for the standard wrench.
5. The sealing ring of the piston should be easy to replace and repair.
6. For pneumatic equipment with buffer organization, the stroke length of buffer organization can refer to the rules of Table 1.
7. Pneumatic equipment with adjustable buffer organization should have the organization of the external adjustment of the buffer effect of the cylinder.
The above is all the contents of the pneumatic actuator of the valve actuator introduced in detail by Wuxi Xinming automatic control valve industry co., ltd. if you have any questions about the pneumatic actuator, please feel free to call for advice and wait for your cooperation.