Technical standards followed by pneumatic actuators
Products in each industry have their own standards, and products that meet the required standards can be used in various industries. Among them, the products in the valve industry strictly abide by its internal standards, and only when all standards are met can it be guaranteed that there will be no malfunctions in operation. Today we will focus on the pneumatic actuator products in the downstream industry. The function of the pneumatic actuator is to open and close the valve actuator through the pneumatic pressure. In the actual operation process, it is still necessary to have a full understanding of the technical standards of each link. The following editor will briefly introduce
1. Standards that need to be met in structure
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 instructions, 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 should meet the requirements of ISO5211 (bottom), GB/T12222 and GB/T12223.
3. The pneumatic device with manual mechanism should be able to use its manual mechanism to open and close the valve when the air source is interrupted. When facing the handwheel, the handwheel or handle should be turned counterclockwise to open the valve, and clockwise to turn the valve. close.
4. When the end of the piston rod is internally or externally threaded, there should be a wrench mouth suitable for standard wrenches.
5. The sealing ring of the piston should be easy to replace and repair.
6. For pneumatic devices with buffer mechanism, the stroke length of the buffer mechanism can refer to the regulations in "Table 1".
7. The pneumatic device with adjustable buffer mechanism should have a mechanism for adjusting the buffer function outside the cylinder.
8. The thread size of the air inlet and outlet of the cylinder should meet the requirements of MANURNORM (accessory standard) GB/T7306.1, GB/T7306.2 and GB/T7307.
