What is a butterfly valve


The butterfly valve is mainly composed of valve body, b […]

The butterfly valve is mainly composed of valve body, butterfly plate, stem, sealing ring and other components. The closing part of the valve is a disc-shaped butterfly plate which can be rotated 90 about its axis. The direction of the vertical fluid flow in the plate axis. When the drive handle rotates, the valve stem and the butterfly plate are rotated together to open or close the valve.

The disc of the butterfly valve is disc-shaped, and the sealing valve seat is a P-shaped rubber ring. This ring ensures the sealing performance of the valve and has good corrosion resistance, but it is not suitable for the piping of high-temperature medium. Some types of butterfly valves are made directly on the valve body, or after welding the wear-resistant material and corrosion-resistant material on the valve body, the valve seat is processed, and the butterfly valve can be used as a stop valve in the pipeline.

When the butterfly valve is installed in the pipeline, it should ensure that the arrow on the valve body is consistent with the direction of the medium flow, so as to improve the sealing of the valve by means of the pressure of the medium. The medium that the butterfly valve can convey and control is water, air, coal gas, liquid natural gas, dry powder, mud, and a mixture with suspended matter.

What are the types of butterfly valves?The types of butterfly valves include wafer-type butterfly valves, electric butterfly valves and worm-drive butterfly valves, pneumatic butterfly valves, and hard-seal butterfly valves.