Pneumatic control valves use gas as the driving force, and their action is fast and sensitive, able to respond to changes in control signals in a timely manner, suitable for situations that require rapid adjustment. In addition, its working principle is easy to understand, making it convenient for maintenance personnel to comprehend and operate; Compared to electric valves, there is no need to worry about the risk of explosion caused by electric sparks, making it particularly suitable for use in flammable and explosive environments such as chemical, oil and gas industries. This makes its application in hazardous areas more advantageous.

Its design is relatively simple, consisting of a pneumatic actuator and a regulating valve, with a small overall volume and minimal installation space requirements, making it convenient for layout and installation in complex industrial sites; It can work normally in harsh environments such as high dust and humidity, such as metallurgy, papermaking and other industries, demonstrating good durability and stability. Especially outstanding in regulating tasks of medium and low pressure with large caliber, commonly used in fields such as municipal water supply and ventilation systems; At the same time, it can also meet the requirements for rapid response in working conditions such as boilers and emergency shutdowns.

Measurement steps for pneumatic control valve:

1. Wiring and initialization: Connect the wires correctly according to the instructions and connect the air source to adjust the setting device. Ensure that all devices are in standby mode and ready for subsequent testing.

2. Select calibration points: evenly select 5 calibration points within the full range, including upper and lower limit values. The setting of these points helps to comprehensively evaluate the performance of the valve at different opening degrees.

3. Bi directional calibration operation: Perform calibration processes in both forward (increasing input signal) and reverse (decreasing input signal) directions. When approaching the target calibration point, it is necessary to slowly change the input power value; When the signal switches, record the displayed value of the standard as the actual input value. This step can verify the accuracy and linearity of the valve's response to control signals.

4. Stability monitoring: Input stable control signals to the pneumatic control valve and observe whether its action is smooth. If there are frequent oscillations, shaking, or delayed movements, it is necessary to investigate issues with the actuator, valve itself, or signal source. If necessary, dynamic characteristics can be optimized by adjusting parameters.

5. Stress testing and safety verification: Increase the working pressure to 1.5 times the working pressure for extreme testing, simulating the pressure environment under special working conditions. This test aims to confirm that the regulating valve can maintain sealing and structural integrity under high pressure conditions, ensuring compliance with safety operating standards.