Working principle of pneumatic butterfly valve:
Pneumatic butterfly valve is a type of valve that uses a circular butterfly plate that rotates with the valve to achieve opening and closing, and is mainly used as a block valve to achieve activation. It can also be designed to have the function of regulating or regulating both section valves. Disc valves are increasingly used in low-pressure large and medium diameter pipelines. Butterfly valves have a simple structure, small size, and light weight, consisting of only a few components. And it only needs to rotate 90 ° to quickly open and close, with simple operation. At the same time, this electric valve has good fluid control characteristics. Butterfly valve in positionWhen in the open position, the thickness of the butterfly plate is a single resistance when the medium flows through the valve body, so the pressure drop generated by this valve is very small, thus having good flow control characteristics. Butterfly valves have two sealing types: elastic sealing and metal sealing. Elastic sealing valve, the sealing ring can be embedded on the valve body or attached around the butterfly plate. If butterfly valves are required for flow control, the main thing is to choose the correct size and type of valve. The structural principle of butterfly valves is particularly suitable for making large-diameter valves. Butterfly valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also in the cooling water system of thermal power plants.
What are the main characteristics of pneumatic butterfly valves?
1. Used to connect or cut off the airflow in the vacuum pipeline.
2. The valve stem does not move up or down.
3. The valve can withstand positive pressure.
4. This butterfly valve is designed and manufactured using a new structural form of welding a midline disc plate and a short structural steel plate. It has a compact structure, light weight, easy installation, low flow resistance, large flow capacity, avoids the influence of high temperature expansion, and is easy to operate. No connecting rods, bolts, etc. inside the body, reliable operation, and long service life. It can be installed in multiple workstations without being affected by the flow direction of the medium.
5. By using an electromagnetic directional valve to change the direction of the air path, the control cylinder drives the butterfly valve to perform opening and closing movements.
6. Optional feedback signal device and electrical valve positioner.
7. The applicable medium is pure air and non corrosive gases.