  Pneumatic control valve uses compressed air as the power source, cylinder as the actuator, and drives the valve by means of electrical valve positioner, converter, solenoid valve, retaining valve and other accessories to realize switching or proportional adjustment, receiving industry The control signals of the automation control system are used to complete various process parameters such as flow, pressure, temperature, etc. to adjust the pipeline medium. The characteristics of the pneumatic regulating valve are simple control, fast response, and intrinsic safety. No additional explosion-proof measures are required. Therefore, it is one of the industrial process control instruments widely used by petroleum, chemical, electric power, metallurgical and other industrial enterprises.
When purchasing pneumatic control valves, only the specifications, categories, and pressures are sufficient to meet the procurement requirements, which is not perfect in the current market economy environment. Because of the competition of products, the pneumatic regulating valve manufacturers have carried out different innovations under the concept of unified design of pneumatic regulating valves, forming their own corporate standards and product personality. Therefore, when the pneumatic control valve is purchased, the technical requirements are more detailed, and the manufacturer has reached a consensus to obtain the agreement. It is necessary to be the accessory of the pneumatic control valve purchase contract. Below we introduce the four general requirements for pneumatic control valves, as follows:
1. The manufacturing standard of pneumatic regulating valve should indicate the national standard number according to the enterprise. If it is the enterprise standard, the enterprise contract should be attached to the procurement contract.
2. The specifications and categories of pneumatic control valves produced shall comply with the requirements of the piping design documents.
3. The working pressure of the pneumatic regulating valve requires ≥ the working pressure of the pipeline. Under the premise of not affecting the price, the working pressure of the valve should be greater than the actual working pressure of the pipeline; any side of the pneumatic regulating valve should be able to withstand 1.1 times the valve pressure value without leakage; the valve body should be able to withstand twice the valve pressure requirements when the valve is open.
4. The model of the pneumatic regulating valve should indicate the national standard numbering requirements. If it is an enterprise standard, the relevant description of the model should be indicated.
Fuyang Yuanfeng Valve Industry Co., Ltd. is a professional manufacturer of regulating valves. Its main products include various types of pneumatic regulating valves, electric regulating valves, self-operated regulating valves, high performance butterfly valves, nitrogen sealing valves and various special valves.
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