What are the general requirements pneumatic valves

1. Pneumatic valve specifications and categories, should accord with the requirement of pipe design documents. 2. Pneumatic valve type shall be marked according to gb code requirements. If the enterprise standards, should indicate the type of relevant specification. Electric butterfly valves, electric gate valves, electric valve 3. Pneumatic valve working pressure and requirement of pipe or work pressure, without affecting the price under the premise of the valve can withstand work pressure should be greater than pipeline of actual work; Pneumatic valve closed condition should be able to withstand any side 1. 1 times the working pressure of valve value without leakage; Open valve, the valve body shall be able to withstand 2 times the working pressure of valve requirements. 4. Pneumatic valve manufacturing standards, should be according to gb code, if the enterprise standards, on the purchase order file should be attached to the enterprise.