Butterfly valve Butterfly plate was installed in the diameter of the pipe. Channel in butterfly valve body is cylindrical, disc-shaped disc around the axis of rotation, rotation angle is 0-90 degrees, rotate to 90 degrees, the valve is fully open
Butterfly's valve of simple structure, small size, light weight, only a few parts. And just rotated 90 degrees, you can quickly open and close, easy operation, and the valve, has good flow control characteristics. When the valve is in the fully open position, thickness of butterfly valves is that media stream only when the resistance of the valve body, therefore, produced by a small pressure drop through the valve. Elastic sealing butterfly valves and metal seals two kinds seal form. Resilient seal valves, seals can be embedded in the body, or in its vicinity around the disc.
Valve seal is used generally live longer than Elastic sealing of valves, but it is difficult to be completely sealed. Metal seals can adapt to high temperature, flexible seal, a temperature limit of the defect.
If a butterfly valve used as a flow control is required, which is, correct choice of sizes and types. Structure principle of butterfly valves, especially for large diameter valves. Butterfly valves are not only in the oil, gas, chemicals, water treatment and other general industries are widely used, but also for cooling water system of thermal power station.
Butterfly valves are commonly used or flanged butterfly valve wafer type butterfly valve two
Wafer butterfly valve with double head bolts connect the valve between two pipe flanges.
Flanged butterfly valves, valves with flanged and bolted flanged connections at both ends on the valve in the pipeline flanges.