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Technical standards followed by pneumatic actuators


Release time:

2022-12-05

Wuxi xinming automatic control valve industry co., ltd. tells you the technical standards followed by pneumatic actuators Products in each industry have their own standards, and products that meet the requirements and standards can be applied to various industries. Among them, the products in the valve industry strictly abide by the standards within it. Only by meeting all standards can we ensure that there will be no failure problems in operation. Today we will focus on pneumatic actuator products in the downstream industry. The function of the pneumatic actuator is to open and close the valve by air pressure. In the actual operation process, it is still necessary to have a full understanding of the technical standards of each link. The following small series on a simple introduction 1. structural standards to be met 1. The pneumatic device is mainly composed of cylinders, pistons, gear shafts, end covers, seals, screws, etc.; the complete set of pneumatic devices should also include opening indicators, stroke limits, solenoid valves, positioners, pneumatic components, manual mechanisms, and signals Feedback and other components. 2. The connection size of the pneumatic device and the valve shall comply with the provisions of ISO5211 (bottom), GB/T12222 and GB/T12223. 3, with a manual mechanism of the pneumatic device, when the gas source is interrupted, should be able to use its manual mechanism for valve opening and closing operation, facing the hand wheel, the hand wheel or handle should be rotated counterclockwise to open the valve, clockwise rotation to close the valve. 4. When the end of the piston rod is internal and external, there should be a wrench mouth suitable for a standard wrench. 5. The sealing ring of the piston should be easy to replace and repair. 6. Pneumatic device with adjustable buffer mechanism should have a mechanism for adjusting its buffer effect outside the cylinder body. 2. performance standards to be met 1. The rated output force or torque of the pneumatic device shall comply with the provisions of GB/T12222 and GB/T12223 2. Under no-load conditions, enter the air pressure specified in Table 2 into 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 the pneumatic device in the opening and closing directions shall not be less than the value marked on the sign of the pneumatic device, and the action shall be flexible, and deformation and other abnormal phenomena shall not be allowed in each part. 4. When the sealing test is carried out with large working pressure, the amount of air leaking from the back pressure side shall not 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 shall be carried out with a large working pressure of 1.5 times. After the test pressure is maintained for 3min, the cylinder end cover and static seal parts are not allowed to have leakage and structural deformation. 6, the number of action life, pneumatic device simulation valve action, in the case of maintaining the two directions of the output torque or thrust capacity, the opening and closing operation of the opening and closing times should not be less than 50000 times (open-close cycle for a). 7. Pneumatic device with buffer mechanism, when the piston moves to the end position of the stroke, impact phenomenon is not allowed. The above is the content of our company today, if you have any advice, please call our company!

Technical standards followed by pneumatic actuators

 

Wuxi Xinming automatic control valve industry co., ltd tells youPneumatic actuatorComplianceFollow the technical standards
Products in each industry have their own standards, and products that meet the requirements and standards can be applied to various industries. Among them, the products in the valve industry strictly abide by the standards within it. Only by meeting all standards can we ensure that there will be no failure problems in operation. Today we will focus on pneumatic actuator products in the downstream industry.Pneumatic actuatorThe function is to open and close the regulating valve through the gas pressure. In the actual operation process, it is still necessary to have a full understanding of the technical standards of each link. The following small series on a simple introduction
1. structural standards to be met
1. The pneumatic device is mainly composed of cylinders, pistons, gear shafts, end covers, seals, screws, etc.; the complete set of pneumatic devices should also include opening indicators, stroke limits, solenoid valves, positioners, pneumatic components, manual mechanisms, and signals Feedback and other components.
2. The connection size of the pneumatic device and the valve shall comply with the provisions of ISO5211 (bottom), GB/T12222 and GB/T12223.
3, with a manual mechanism of the pneumatic device, when the gas source is interrupted, should be able to use its manual mechanism for valve opening and closing operation, facing the hand wheel, the hand wheel or handle should be rotated counterclockwise to open the valve, clockwise rotation to close the valve.





4. When the end of the piston rod is internal and external, there should be a wrench mouth suitable for a standard wrench.
5. The sealing ring of the piston should be easy to replace and repair.
6. Pneumatic device with adjustable buffer mechanism should have a mechanism for adjusting its buffer effect outside the cylinder body.
2. performance standards to be met
1. The rated output force or torque of the pneumatic device shall comply with the provisions of GB/T12222 and GB/T12223
2. Under no-load conditions, enter the air pressure specified in Table 2 into 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 the pneumatic device in the opening and closing directions shall not be less than the value marked on the sign of the pneumatic device, and the action shall be flexible, and deformation and other abnormal phenomena shall not be allowed in each part.
4. When the sealing test is carried out with large 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 shall be carried out with a large working pressure of 1.5 times. After the test pressure is maintained for 3min, the cylinder end cover and static seal parts are not allowed to have leakage and structural deformation.
6, the number of action life, pneumatic device simulation valve action, in the case of maintaining the two directions of the output torque or thrust capacity, the opening and closing operation of the opening and closing times should not be less than 50000 times (open-close cycle for a).
7. Pneumatic device with buffer mechanism, when the piston moves to the end position of the stroke, impact phenomenon is not allowed.




The above is the content of our company today, if you have any advice, please call our company!