What Is The Pneumatic Control Method Of Pneumatic Sanitary Butterfly Valve?
Sanitary Butterfly Valve is a widely used valve, which adopts pneumatic control to realize the control of fluid medium. Pneumatic sanitary butterfly valves are characterized by simple structure, flexible operation, good sealing, etc. They are widely used in food, medicine, chemical industry and other industries, and play an important role in the control of fluid medium.
1. Pneumatic control system
Pneumatic sanitary butterfly valves are controlled by pneumatic control system. Pneumatic control system mainly consists of air source, pneumatic actuator, signal conditioning device and control circuit. The air source provides gas power, usually compressed air; the pneumatic actuator adjusts the opening of the valve according to the control signal; the signal conditioning device converts the input signal into the opening signal of the valve to realize the control of the valve; the control circuit is responsible for transmitting the control signal and connecting the input signal with the actuator.
2. Control of imported air source
The imported air source of the pneumatic sanitary butterfly valve needs to be controlled to ensure the normal operation of the valve. Usually, the air source can enter the pneumatic system after being adjusted by the pressure regulating valve. The pressure regulating valve can adjust and stabilize the pressure of the air source to ensure the normal operation of the pneumatic actuator. In order to prevent impurities in the gas source from having adverse effects on the pneumatic system, the gas source also needs to be filtered.
3. Control of valve opening
The opening of the pneumatic sanitary butterfly valve is controlled by the pneumatic actuator, which is controlled by the signal regulator. The signal regulator outputs the corresponding control signal according to the change of the input signal to control the stroke of the pneumatic actuator, thereby realizing the opening control of the valve. When the input signal is a large value, the pneumatic actuator works at a large stroke position and the valve is open; when the input signal is a small value, the pneumatic actuator works at a small stroke position and the valve is closed. By adjusting the input signal, the valve can be adjusted.
The pneumatic control method of the pneumatic sanitary butterfly valve is realized through a pneumatic control system. The gas source provides gas power, the pneumatic actuator adjusts the valve opening according to the control signal, the signal regulator realizes the control of the pneumatic actuator, and the control circuit transmits the control signal. This pneumatic control method can ensure the flexibility and accuracy of the valve and is suitable for the control of various fluid media.
