Wafter Butterfly Valve
Wafter Butterfly Valve, also called flap valve, is a simple structure regulating valve that can be used for on-off control of low-pressure pipeline media. Wafter Butterfly Valve means that the closing part (valve or butterfly plate) is a disc, which rotates around the valve shaft. A kind of valve to achieve opening and closing.
The butterfly plate of the Wafter Butterfly Valve is installed in the diameter direction of the pipe. It is simple in structure, small in size and light in weight. It consists of only a few parts, and it can be opened and closed quickly by rotating 90°. The operation is simple. At the same time, the valve has good fluid control characteristics. When the Wafter Butterfly Valve is in the fully open position, the thickness of the butterfly plate is the resistance when the medium flows through the valve body, so the pressure drop produced by the valve is small, so it has better flow control characteristics.
If it is required to be used as a flow control, the main thing is to correctly select the size and type of the valve. Its structural principle is especially suitable for making large-caliber valves. Commonly used are wafer butterfly valve and flange butterfly valve. Wafer type butterfly valve is used to connect the valve between two pipe flanges with stud bolts. Flange type butterfly valve has flanges on the valve, and bolts are used to connect the flanges on the two ends of the valve to the pipe flange.
Wafter Butterfly Valve, as a component used to realize the on-off and flow control of the pipeline system, has been extremely widely used in many fields such as petroleum, chemical industry, metallurgy, and hydropower. In the well-known butterfly valve technology, its sealing form mostly adopts a sealing structure, and the sealing material is rubber, polytetrafluoroethylene, etc. Due to the limitation of structural characteristics, it is not suitable for industries such as high temperature resistance, high pressure resistance, corrosion resistance and wear resistance.
An existing better butterfly valve is a triple eccentric metal hard-sealed butterfly valve. The valve body and the valve seat are connected components, and the sealing surface layer of the valve seat is welded with temperature-resistant and corrosion-resistant alloy materials. The multi-layer soft laminated sealing ring is fixed on the valve plate. Compared with the traditional butterfly valve, this butterfly valve has high temperature resistance, is easy to operate, and has no friction when opening and closing. When closing, the torque of the transmission mechanism increases to compensate for the sealing, which improves the butterfly valve. The advantages of sealing performance and extended service life.