The Selection Principles Of Butterfly Valves

The butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. The butterfly valve has a simple structure, small volume, light weight, and is composed of only a few parts. It can be quickly opened and closed by rotating 90 °, and the operation is simple. At the same time, the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance of the medium flowing through the valve body, so the pressure drop generated through the valve is very small, so it has good flow control characteristics.

If a butterfly valve is required for flow control, the main thing is to choose the correct size and type of valve. The structural principle of butterfly valves is particularly suitable for making large-diameter valves. There are two commonly used butterfly valves: clamp type butterfly valve and flange type butterfly valve. The clamp type butterfly valve is a valve that is connected between two pipeline flanges using double headed bolts. The flange type butterfly valve has a flange on the valve, and the flanges on both ends of the valve are connected to the pipeline flange using bolts.

Butterfly valves, as a component used to achieve on/off and flow control in pipeline systems, have been widely used in many fields such as petroleum, chemical, metallurgy, and hydropower. In the well-known butterfly valve technology, the sealing form mostly adopts a sealing structure, and the sealing materials are rubber, polytetrafluoroethylene, etc. Due to structural limitations, it is not suitable for industries such as high temperature and high pressure resistance, corrosion resistance, and wear resistance.