Chapter 1. Introduction Available to Purchase

A mixed-flow pump is a centrifugal pump with a mixed-flow impeller [1]. The specific speed (n_s) lies between 35 and 80 rpm for low-speed mixed-flow pumps and between 80 and 160 rpm for higher-speed mixed-flow pumps (in special cases, even higher). It has characteristics of both radial flow and axial flow pumps. As liquid flows through the impeller of a mixed-flow pump, the impeller blades push the liquid out away from the pump shaft and to the pump suction at an angle greater than 90°. The impeller of a typical mixed-flow pump and the flow through a mixed-flow pump are shown in Fig. 1.1.