Basic Structure Of Pneumatic Actuator

The types and structures of the regulating mechanisms of pneumatic actuators are roughly the same, but the actuators are mainly different. Therefore, when the pneumatic actuator is introduced, it is divided into two parts: the actuator and the regulating valve. Pneumatic actuator consists of two parts: actuator and regulating valve (regulating mechanism). According to the size of the control signal, corresponding thrust is generated to push the regulating valve to move. The regulating valve is the regulating part of the pneumatic actuator. Under the action of the thrust of the actuator, the regulating valve produces a certain displacement or angle to directly regulate the flow of fluid.
1. Pneumatic devices are mainly composed of cylinders, pistons, gear shafts, end covers, seals, screws, etc.; a complete set of pneumatic devices should also include opening indicators, stroke limits, solenoid valves, positioners, pneumatic components, manual mechanisms, signals Feedback and other components.
2. The connection dimensions between the pneumatic device and the valve should comply with the regulations of ISO5211 (bottom), GB/T12222 and GB/T12223.
3. For pneumatic devices with manual mechanisms, when the air source is interrupted, the manual mechanism should be used to open and close the pneumatic ball valve. When facing the handwheel, the handwheel or handle should rotate counterclockwise to open the valve, and rotate clockwise to open the valve. The valve is closed.
4. When the end of the piston rod has internal or external threads, 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. For pneumatic devices with buffer mechanisms, the stroke length of the buffer mechanism can refer to the provisions of "Table 1".
7. Pneumatic devices with adjustable buffer mechanisms should have a mechanism outside the cylinder to adjust their buffering effect.
8. The thread size of the cylinder inlet and outlet should comply with the requirements of MANUR NORM (accessory standard) sypv, GB/T7306.1, GB/T7306.2 and GB/T7307.