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What is a Pneumatic Actuator?


Release time:

2022-07-08

Today, by Wuxi Xinming automatic control valve industry Co., Ltd. for you to introduce in detail what is the pneumatic actuator? Principle, classification, selection of a clear (below): Classification of 3. pneumatic actuators 1. Membrane execution organization Membrane actuator is very commonly used, it can be used as a general control valve propulsion equipment, composed of pneumatic membrane actuator. Pneumatic diaphragm-type implementation of the signal pressure p effect on the diaphragm, so that it deforms, drives the push rod on the diaphragm to move, so that the valve core is displaced, and then changes the opening of the valve. It has simple structure, low price, convenient maintenance and wide use. 2. Piston-type executive organization The pneumatic piston executes the organization to make the piston move in the cylinder to generate thrust. Obviously, the output strength of the piston type is much greater than that of the thin film type. Therefore, the diaphragm type is suitable for occasions with small output and high precision; the piston type is suitable for occasions with large output force, such as large diameter, high pressure drop control or butterfly valve propulsion equipment. 3. Rand-pinion execution organization. Rand-pinion (double-piston rack) pneumatic actuator has the characteristics of compact structure, beautiful appearance, quick response, stable operation, and long service life. All accessories are selected advanced anti-corrosion treatment skills, can get used to a variety of harsh conditions. Its high and low temperature and various special stroke actuators have outstanding performance in various fields of use. Selection of 4. Pneumatic Actuator Before choosing a pneumatic actuator, acknowledge the valve torque. And add the safety value on the torque, water vapor or non-smooth liquid medium to add 25 percent of the safety value; non-smooth slurry liquid medium to add 30 percent of the safety value. Performance characteristics of 5. pneumatic actuators 1. The additional output force or torque of pneumatic equipment shall comply with the rules of GB/T12222 and GB/T12223, which are film-type execution organizations; 2. In the case of no-load, enter the air pressure according to the rules in the cylinder, and its action should be stable, without blocking and crawling; 3. Under the air pressure of 0.6MPa, the output torque or thrust of pneumatic equipment in both opening and closing directions shall not be less than the value marked on the sign of pneumatic equipment, and the action shall be flexible, and permanent deformation and other abnormal phenomena shall not be allowed in all parts; 4. When the sealing experiment is carried out with the upper limit of working pressure, the amount of air leaking from the respective back pressure side is not allowed to exceed (3+0.15D)cm3/min (standard state); The amount of air leaking from the end cover and output shaft is not allowed to exceed (3+0.15d)cm3/min; 5. The strength test is carried out with the upper limit of 1.5 times of the working pressure. After keeping the experimental pressure for 3min, the cylinder end cover and static seal parts are not allowed to have leakage and structural deformation; 6. The number of operating lives. Pneumatic equipment imitates the action of pneumatic valves. Under the condition that the output torque or thrust in both directions can be maintained, the number of opening and closing operations shall not be less than 50000 (the opening and closing cycle is once); 7. Pneumatic equipment with cushioning organization, when the piston moves to the end of the stroke position, it is not allowed to show impact phenomenon. The above is the Wuxi Xinming automatic control valve industry Co., Ltd. for you to introduce in detail all the contents of what is the pneumatic actuator, if you have any questions, welcome to come to consult at any time!

What is a Pneumatic Actuator?

Today, Wuxi Xinming automatic control valve industry co., ltd will give you a detailed introduction of what isPneumatic actuator? The principle, classification and selection are explained once (below):

3.Pneumatic actuatorClassification
1. Membrane execution organization
Membrane actuator is very commonly used, it can be used as a general control valve propulsion equipment, composed of pneumatic membrane actuator. Pneumatic diaphragm-type implementation of the signal pressure p effect on the diaphragm, so that it deforms, drives the push rod on the diaphragm to move, so that the valve core is displaced, and then changes the opening of the valve. It has simple structure, low price, convenient maintenance and wide use.
2. Piston-type executive organization
The pneumatic piston executes the organization to make the piston move in the cylinder to generate thrust. Obviously, the output strength of the piston type is much greater than that of the thin film type. Therefore, the diaphragm type is suitable for occasions with small output and high precision; the piston type is suitable for occasions with large output force, such as large diameter, high pressure drop control or butterfly valve propulsion equipment.
3. Rand-pinion execution organization.
Rand-pinion (double-piston rack) pneumatic actuator has the characteristics of compact structure, beautiful appearance, quick response, stable operation, and long service life. All accessories are selected advanced anti-corrosion treatment skills, can get used to a variety of harsh conditions. Its high and low temperature and various special stroke actuators have outstanding performance in various fields of use.
Selection of 4. Pneumatic Actuator
Before choosing a pneumatic actuator, acknowledge the valve torque. And add the safety value on the torque, water vapor or non-smooth liquid medium to add 25 percent of the safety value; non-smooth slurry liquid medium to add 30 percent of the safety value.
Performance characteristics of 5. pneumatic actuators
1. The additional output force or torque of pneumatic equipment shall comply with the rules of GB/T12222 and GB/T12223, which are film-type execution organizations;
2. In the case of no-load, enter the air pressure according to the rules in the cylinder, and its action should be stable, without blocking and crawling;
3. Under the air pressure of 0.6MPa, the output torque or thrust of pneumatic equipment in both opening and closing directions shall not be less than the value marked on the sign of pneumatic equipment, and the action shall be flexible, and permanent deformation and other abnormal phenomena shall not be allowed in all parts;
4. When conducting experiments with the upper limit of working pressure for sealing experiments, the amount of air leaking from the respective back pressure side is not allowed to exceed (3 0.15D)cm3/min (standard state); The amount of air leaking from the end cover and output shaft is not allowed to exceed (3 0.15d)cm3/min;
5. The strength test is carried out with the upper limit of 1.5 times of the working pressure. After keeping the experimental pressure for 3min, the cylinder end cover and static seal parts are not allowed to have leakage and structural deformation;
6. The number of operating lives. Pneumatic equipment imitates the action of pneumatic valves. Under the condition that the output torque or thrust in both directions can be maintained, the number of opening and closing operations shall not be less than 50000 (the opening and closing cycle is once);
7. Pneumatic equipment with cushioning organization, when the piston moves to the end of the stroke position, it is not allowed to show impact phenomenon.















The above is the Wuxi Xinming automatic control valve industry Co., Ltd. for you to introduce in detail all the contents of what is the pneumatic actuator, if you have any questions, welcome to come to consult at any time!