What are the advantages of butterfly valves?
D. sediments are not readily accumulated;The E. is compact and has little installation
B. is cheap, especially when the caliber is big;C. the resistance loss is small and the fluid decreases through pressure;
Butterfly valve, also known as shutter valve, its advantages are:A. has a large circulation capacity and is about 1.2 times the same size as two seat valves;
