Flange butterfly valve is mainly used in which industries, the application of media introduction
Flange butterfly valve is widely used in the medium temperature of ≤ 550 ℃ metallurgy, electric power, petroleum, air, chemical, gas, combustible gas and water supply and drainage and other corrosive media pipeline, is the best device to adjust the flow and interception. Flange type butterfly valve mainly with large diameter, commonly used soft seal flange type butterfly valve and hard seal flange type butterfly valve.
Flange type butterfly valve using three eccentric structure principle, the use of the inherent cam effect, completely eliminate the 90 degrees of travel between the valve seat and all the friction between the sealing ring. The design of rubber soft seal butterfly valve adopts single eccentric structure, which is different from the middle line soft seal. After the butterfly plate rotates about 20 degrees, the valve seat and the sealing ring are quickly separated, thus reducing friction.
The butterfly plate of the flanged butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0 ° and 90 °. When the valve is rotated to 90 °, the valve is fully open. Flange type butterfly valve in the pipeline pressure loss is relatively large, is three times the gate valve, so the choice of butterfly valve, should give full consideration to the pipeline system by the pressure loss, should also consider the closure of the butterfly plate to withstand the pressure of the pipeline medium firmness.
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