2020 High quality Concentric Butterfly Valve - FUO1 BV1UDF 2L(U flanged butterfly valves) – Fortis

Introduce
The U-type flange butterfly valve adopts the top mounted structure, which reduces the connecting bolts of the valve body itself under the condition of high pressure and large diameter, enhances the reliability of the valve and overcomes the influence of the system weight on the normal operation of the valve.

Scope of application
U-type flange butterfly valve is widely used in coal chemical industry, petrochemical industry, rubber, papermaking, pharmaceutical and other pipelines as the medium of the shunt confluence or flow switching device.
The butterfly plate of butterfly valve is installed in the diameter direction of pipeline. In the cylindrical channel of butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0 ° and 90 ° and when the rotation reaches 90 ° the valve plate is fully open.
Butterfly valve is simple in structure, small in size and light in weight, and only consists of a few parts. Moreover, the valve can be opened and closed quickly by only 90 ° rotation, which is easy to operate. At the same time, the valve has good fluid control characteristics. When the flange butterfly valve is in the fully open position, the thickness of butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics. Butterfly valve has elastic seal and metal seal. Elastic sealing valve, sealing ring can be inlaid on the valve body or attached to the periphery of butterfly plate.
The valve with metal seal has longer service life than that with elastic seal, but it is difficult to seal completely. The metal seal can adapt to higher working temperature, while the elastic seal has the limitation of temperature.
If butterfly valve is required to be used as flow control, the main thing is to select the correct size and type of valve. The structure principle of butterfly valve is especially suitable for making large diameter valve. Butterfly valve is not only widely used in petroleum, gas, chemical industry, water treatment and other general industries, but also used in the cooling water system of thermal power station.