Flange butterfly valve is mainly used in industrial production pipeline, its main role is to cut off the circulation of medium in the pipeline, or adjust the size of medium flow in the pipeline. Flange butterfly valve is widely used in water conservancy engineering, water treatment, petroleum, chemical industry, urban heating and other general industries, and can also be used in the condenser and cooling water system of thermal power station.
Flanged butterfly valve is especially suitable for making large diameter valve, which is widely used in the field of large diameter regulation. When flange butterfly valve is fully opened, the flow resistance is small. When the opening Angle is between about 15-70, flange butterfly valve can be very sensitive to control the flow of medium.
In addition, because the butterfly plate of flange butterfly valve is wiped when rotating movement, this type of valve can be used in pipes with suspended granular medium, and according to the strength of the seal, it can also be used in powder and granular lines of medium.
Classification of the flanged butterfly valves
Flanged 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 material of soft seal flange butterfly valve is rubber and fluorine plastic; and the sealing material of hard seal flange butterfly valve is metal to metal, metal to fluorine plastic and multi-layer composite plate.
The sealing ring of soft seal flange butterfly valve can be embedded in the valve body channel and can be inlaid around the butterfly plate. When it is used as cut off valve, its sealing performance can reach FCI 70-2:2006 (ASME B16 104) VI, much higher than that of hard seal flange butterfly valve. However, due to the soft sealing material is limited by temperature, soft seal flange butterfly valve is usually used in the field of water conservancy and water treatment at room temperature.
Metal hard seal flange butterfly valve has material advantages, can adapt to the higher working temperature, larger working pressure, service life is longer than soft seal, but the disadvantage of hard seal flange butterfly valve is obvious, is difficult to do completely sealed, sealing performance is very poor, so this kind of flange butterfly valve is generally used for sealing performance requirement is not high, do adjust the flow.
Besides, Tianjin Tanggu Water Seal Valve Co., Ltd. is a technologically advanced elastic seat valve supporting enterprises, the products are elastic seat wafer butterfly valve, lug butterfly valve, double flange concentric butterfly valve, double flange eccentric butterfly valve, balance valve, wafer dual plate check valve, Y-Strainer and so on. At Tianjin Tanggu Water Seal Valve Co., Ltd., we pride ourselves on providing first-class products that meet the highest industry standards. With our wide range of valves and fittings, you can trust us to provide the perfect solution for your water system. Contact us today to learn more about our products and how we can help you.
Post time: May-31-2024
