Introduction to the use of pneumatic actuators
Pneumatic actuator, also known as pneumatic device or pneumatic actuator, commonly known as pneumatic head, is an actuator driven by air pressure to open, close or adjust the valve. This paper describes the various technical requirements of the pneumatic head. structure
1. Pneumatic device is mainly made of cylinders. Piston. Gear shaft. End cap. Seals. Screw sleeve pneumatic devices shall also include an opening indication. Travel limit. Solenoid valve. Positioners. Pneumatic elements. Manual mechanism. Composed of signal feedback and other components.
2 pneumatic device and valve connection size should meet the requirements of ISO5211(bottom).GB/T12222 and GB/T12223 provisions.
3. When the air source is interrupted, the pneumatic device with manual mechanism should be able to open and close the valve with its manual mechanism. When facing the handwheel, the HANDwheel or handle should be turned counterclockwise to open the valve and clockwise to close the valve.
4. Internal piston rod end. For the external thread, the spanner should be suitable for the standard spanner.
5. Piston ring should be easy to replace and maintain.
6. Pneumatic device with adjustable buffer mechanism should have the mechanism of adjusting the buffer effect outside the cylinder.
7. Cylinder inlet and outlet thread size should meet the requirements MANURNORM(attachment standard)GB/T7306.
Surface and appearance quality
1. End cover of casting cylinder. End flange. No scratches on the box. Cut marks, air holes, burrs, etc.
2. The outer surface coating or chemical treatment layer of the pneumatic device should be smooth. Smooth. Uniform color, no grease. Indentation and other mechanical damage. Test methods for pneumatic heads
