1. The valve is similar in operation to a ball valve.
2. A butterfly valve is also a type of flow control device, used to make a fluid start or stop
flowing through a section of pipe. As well as this, butterfly valves are used on firefighting
apparatus and typically are used on larger lines, such as front and rear suction ports and tank to
pump lines.
pivotally supported by its stem. A butterfly valve can appear in various styles, including eccentric and
high-performance valves.