Wuxi Xinming Explains Performance Index of Pneumatic Actuator
Pneumatic actuatorIt is an actuator that uses air pressure to drive opening and closing or regulating valves. It is also called pneumatic actuator or pneumatic device, but it is generally called pneumatic head. Pneumatic actuators are sometimes equipped with certain auxiliary equipment.
set. 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 role of the handwheel mechanism
When the control system due to power outages, stop gas, controller no output or actuator failure, it can be used to directly manipulate the control valve to maintain the normal production.
Pneumatic actuatorPerformance indicators:
1. The rated output force or torque of the pneumatic device shall comply with the provisions of GB/T12222 and GB/T12223
2. In the case of no load, enter the specified air pressure 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 permanent deformation and other abnormal phenomena shall not be allowed in each part.
4. During the working pressure test for sealing test, 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, strength test with 1.5 times the working pressure test, keep the test pressure 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 of pneumatic 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.
Key words: pneumatic actuator, Wuxi Xinming, pneumatic valve, pneumatic ball valve, pneumatic butterfly valve