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Function of butterfly valve

Posted by Bundor valve
The name of butterfly valve comes from the shape of its butterfly plate, which is wing like structure, like the wings of a butterfly. The valve body channel of the butterfly valve is cylindrical, and the disc-shaped butterfly plate rotates around the center line of the valve shaft to open and close the valve, with the rotation angle between 0-90 °. The butterfly valve is closed at 0 ° and opened at 90 ° and its function is to cut off and connect the medium flow in the pipeline. When the rotation angle between 0-90 °, the function of butterfly valve is to control the flow of medium in the pipeline as a regulating valve.
 
The name of butterfly valve comes from the shape of its butterfly plate, which is wing like structure, like the wings of a butterfly. The valve body channel of the butterfly valve is cylindrical, and the disc-shaped butterfly plate rotates around the center line of the valve shaft to open and close the valve, with the rotation angle between 0-90 °. The butterfly valve is closed at 0 ° and opened at 90 ° and its function is to cut off and connect the medium flow in the pipeline. When the rotation angle between 0-90 °, the function of butterfly valve is to control the flow of medium in the pipeline as a regulating valve.
As a widely used valve, butterfly valve is mainly used to cut off or regulate the medium flow on the production pipeline. Such as water conservancy engineering, water treatment, petroleum, chemical industry, urban heating and other general industries, and it can also be used in the condenser and cooling water system of thermal power station.
 
Butterfly valve can be divided into center line butterfly valve and eccentric butterfly valve according to the structural form. Rubber, fluoroplastics and other elastic sealing materials are usually used as the sealing pair of center line butterfly valve; metal to metal, metal to fluoroplastics and multilayer composite plate are usually used as the sealing pair of eccentric butterfly valve. The butterfly valve with elastic seal is also called soft seal butterfly valve. Its sealing ring not only can be inlaid in the valve body channel but also around the butterfly plate. When soft seal butterfly valve is used as cut-off valve, its sealing performance can achieved FCI70-2:2006 (ASME B16 · 104) VI class, which is much higher than that of metal seal butterfly valve. However, due to the limited of temperature for elastic sealing materials, soft sealing butterfly valves are more used in the field of water conservancy and water treatment at room temperature. The metal hard seal butterfly valve can adapt to the higher working temperature and has a longer service life than the soft seal butterfly valve. But, it is difficult for the metal seal butterfly valve to be completely sealed and its sealing performance is very poor, so it is generally used to regulate the flow.
 
The butterfly valve is also widely used in the field of large caliber regulation. The flow resistance is small when the butterfly valve is fully opened. When the opening angle of the butterfly plate is about 15-70 °, the butterfly valve can control the medium flow very sensitively. In addition, because the butterfly plate of butterfly valve has the property of wiping when it is rotating, so it can be used in the pipeline with suspended particle medium. According to the strength of the seal, it can also be used in powder and granular medium pipeline.
The above is to show the function of butterfly valve to you. If you want to know more about butterfly valve, you can follow the official website of Bundor valve.