Pneumatic control valves are actuated by compressed air and use a cylinder as the driving mechanism. These valves are controlled through electrical valve positioners, converters, solenoid valves, and other accessories to achieve switching or proportional adjustment. They receive control signals from industrial automation systems to regulate various process parameters such as flow, pressure, and temperature in pipelines. The key advantages of pneumatic control valves include simple operation, fast response time, and inherent safety, which eliminates the need for additional explosion-proof measures. As a result, they are widely used in industries like petroleum, chemical, power generation, and metallurgy.
In today's competitive market, simply meeting basic specifications such as size, type, and pressure is no longer sufficient when purchasing pneumatic control valves. Manufacturers have introduced different innovations under the concept of unified design, leading to unique corporate standards and product identities. Therefore, it's essential to define more detailed technical requirements when procuring these valves. Both the buyer and manufacturer should agree on all technical aspects before finalizing the contract. Below are four general requirements that should be considered when purchasing pneumatic control valves:
1. The manufacturing standard of the pneumatic control valve should clearly state the national standard number. If the product follows an enterprise standard, the corresponding enterprise contract must be included in the procurement agreement.
2. The specifications and types of the pneumatic control valve must align with the piping design documentation to ensure compatibility and proper installation.
3. The working pressure of the valve must be equal to or higher than the pipeline's operating pressure. Whenever possible, the valve's working pressure should exceed the actual pipeline pressure. Additionally, each side of the valve should be able to withstand 1.1 times the rated pressure without leakage. When the valve is open, the body should be capable of withstanding twice the rated pressure.
4. The model designation of the pneumatic control valve should follow the national standard numbering system. If it's based on an enterprise standard, the relevant model description should be clearly specified.
Fuyang Yuanfeng Valve Industry Co., Ltd. is a professional manufacturer specializing in a wide range of control valves, including various types of pneumatic control valves, electric control valves, self-acting control valves, high-performance butterfly valves, nitrogen-sealed valves, and custom-made special valves. With years of experience and a commitment to quality, the company provides reliable solutions for industrial process control applications.
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