What are the general requirements for pneumatic valves?

General requirements for pneumatic valves:

1. The specifications and categories of pneumatic valves produced should meet the requirements of pipeline design documents.

2. The model of the pneumatic valve should be marked with the requirements of the national standard number. If it is an enterprise standard, the relevant description of the model should be indicated.

3. The working pressure of the pneumatic valve is required to be greater than or equal to the working pressure of the pipeline. On the premise of not affecting the price, the working pressure that the valve can withstand should be greater than the actual working pressure of the pipeline; any side of the pneumatic valve should be able to withstand 1.1 times when the valve is closed. Valve working pressure value without leakage; when the valve is open, the valve body should be able to withstand twice the valve working pressure requirement.

4. For the manufacturing standard of pneumatic valve, the national standard number should be stated. If it is an enterprise standard, the enterprise document should be attached to the purchase contract.