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Pneumatic control valve working principle and structure classification


Release time:

2021-07-26

Pneumatic control valve is based on compressed air as the power source, the cylinder as the actuator, and with the help of electric valve positioner, converter, solenoid valve, holding valve and other accessories to drive the valve, the end of the switch or proportional adjustment, receive the control signal of industrial automation control system to end the adjustment of pipeline medium: flow, pressure, temperature and other process parameters. Pneumatic control valve is characterized by simple control, rapid response, and substantial safety, no need to adopt other explosion-proof measures.

Pneumatic control valve working principle and structure classification

Pneumatic control valveWorking principle:
Pneumatic control valve is based on compressed air as the power source, the cylinder as the actuator, and with the help of electric valve positioner, converter, solenoid valve, holding valve and other accessories to drive the valve, the end of the switch or proportional adjustment, receive the control signal of industrial automation control system to end the adjustment of pipeline medium: flow, pressure, temperature and other process parameters. Pneumatic control valve is characterized by simple control, rapid response, and substantial safety, no need to adopt other explosion-proof measures.
Structural classification:
According to the valve action method can be divided into: straight stroke and angular stroke two methods.
Features of pneumatic control valve:
The control is simple and the response is fast and the substance is safe, and there is no need to adopt other explosion-proof measures.
pneumatic control valve device guidelines:
(1) The position of the pneumatic control valve device requires a certain amount of space on the ground. There should be a certain amount of space on the top and bottom of the high valve, and there should be a certain amount of space on the top and bottom of the valve, so as to disassemble and repair the valve. Disassembly and repair. Regarding control valves equipped with pneumatic valve positioners and handwheels, it is necessary to ensure operation, investigation and adjustment of bento.
(2) The regulating valve shall be installed on the horizontal pipeline, and the upper and lower pipes shall be generally supported under the valve to ensure the reliability of Anjing. Straight, generally to be supported under the valve to ensure the reliability of Anjing. On special occasions, in special occasions, the need to control valve level device in the vertical pipeline, the control valve should also be supported (on the road, the control valve should also be supported (small diameter control valve outside). When the device, to prevent the control valve to bring additional stress,).
(3) the operating environment temperature of the regulating valve should be (-30 ~ +60). The operating environment temperature of the regulating valve should be (-30~60)(-30 relative humidity is not more than 95% 95%. ℃, relative humidity is not more than 95%.