Application of flange butterfly valve

Flange type butterfly valve is mainly used in industrial production pipeline. Its function is to cut off or adjust the flow of medium in the pipeline. Flange butterfly valve is widely used in water conservancy engineering, water treatment, petroleum, chemical industry, urban heating and other general industrial production lines, also can used in the thermal power plant of the condenser and cooling water system.

Flange butterfly valve can be divided into soft sealing flange butterfly valve and hard sealing flange butterfly valve according to the sealing surface material. The sealing pair of the soft sealing flange butterfly valve adopts elastic sealing materials such as rubber and fluoroplastic. The sealing pair of hard sealing flange butterfly valve adopts metal to metal, metal to fluoroplastic and multilayer composite plate. The sealing ring of the soft sealing flange butterfly valve can be inlaid in the valve body channel and around the disc. When it is used as a shut-off valve, its sealing performance can reach class FCI70-2:2006(ASME B16 • 104)VI, which is much higher than that of the hard sealing flange butterfly valve. However, because the soft sealing material is limited by the temperature, so it is usually used in the field of water conservancy and water treatment at room temperature. The metal hard sealing flange butterfly valve has the advantages of material, which can adapt to higher working temperature, higher working pressure and longer service life than the soft sealing flange butterfly valve. However, the disadvantages of hard sealing flange butterfly valve are obvious, that is, it is difficult to achieve complete sealing and has poor sealing performance. Therefore, this kind of flange butterfly valve is generally used for the occasion of low sealing performance requirements, to adjust the flow.

The flange butterfly valve is particularly suitable for making large-diameter valves, which are widely used in the field of large-diameter regulation. When the flange butterfly valve is fully opened, the flow resistance is small. When the opening angle of the butterfly plate is about 15-70 °, the flange butterfly valve can control the medium flow very sensitively.

Because the disc of the flange butterfly valve can be wiped when it is rotating, the valve can be used in the pipeline with suspended particle medium. According to the strength of the seal, it can also be used in the pipeline with powder and particle medium.

These are about the main purpose of the flange type butterfly valve, I think that you will have a certain understanding of where the flange type butterfly valve is used through the introduction. To learn more about flange butterfly valve, you can log on the official website of Bundor valve. If you want to buy some valves, please feel free to contact us