Experimental study for flow characteristics of eccentric butterfly valves

Abstract

An experimental study was performed to investigate the flow characteristics of single, double, and triple eccentric butterfly valves and concentric inclined disc butterfly valves. Valve flow coefficients, relative valve flow coefficients, and valve loss coefficients are compared between each type of butterfly valve in detail. These coefficient curves are quite different from those of conventional butterfly valves. Finally, the triple eccentric butterfly valve is recommended for use in flow rate or pressure controls, while single or double eccentric butterfly valves are better used in on-off regulation of large flow rates.