Main types of Butterfly valvesCompared with other types of valves, the butterfly valve is relatively a more simple and more economic choice. Generally, the Butterfly Valves are classified as the following:According to the piping connection design, there are wafer-type butterfly valves, lug-type butterfly valves, and flange-type butterfly valves ( the double flange butterfly valve is the most popular type). According to the disc closure design, there are concentric butterfly valves and eccentric butterfly valves. Some bf valves are required along the middle of the piping lines, sandwiched between two adjacent pipe flanges; in this case, the non-threaded butterfly valve, known as ‘wafer type butterfly valve’ or ‘wafer valve’, is a more adequate choice. Among so many china butterfly valves, why choose Lituo butterfly valves?