Basic introduction and general requirements of pneumatic gate valve
For pneumatic gate valve, with the help of the valve driven by compressed air, when the gate valve is closed, the sealing surface can only be sealed by the medium pressure, that is, the sealing surface of the gate plate is pressed to the valve seat on the other side to ensure the sealing of the cover, that is, self sealing. Most gate valves adopt forced sealing, that is, when the valve is closed, the gate shall be pressed into the valve seat by external force to ensure the sealing performance of the sealing surface.
Basic introduction
Pneumatic gate valve: a valve driven by compressed air.
In the current market economy environment, the procurement of pneumatic valves can meet the procurement requirements only by specifying the specifications, categories and working pressure. For the sake of product competition, pneumatic valve manufacturers have made different innovations under the concept of unified design of pneumatic valves, forming their own enterprise standards and product personality. Therefore, it is necessary to propose more detailed technical requirements when purchasing pneumatic valves and reach a consensus with the manufacturer.
General requirements
1) The specification and category of pneumatic valve shall meet the requirements of pipeline design documents.
2) The model of pneumatic valve shall indicate the national standard number requirements. If it is an enterprise standard, the relevant description of the model shall be indicated.
3) The working pressure of pneumatic valve shall be greater than or equal to the actual working pressure of the pipeline on the premise that the pipeline affects the price; When the pneumatic valve is closed, either side shall withstand 1 time. The working pressure of the valve is 1 time, without leakage; When the valve is opened, the valve body shall withstand twice the working pressure of the valve.
4) The manufacturing standard of pneumatic valve shall state the national standard number. If it is an enterprise standard, the purchase contract shall be attached with enterprise documents.
