Most used pumps in engineering because they support wide range of heights and flow rates. Radial flow, rotodynamic pump.
Volute
Section titled “Volute”Casing of the impeller. A passage with increasing area, to reduce velocity (to reduce losses).
Diffuser
Section titled “Diffuser”A fixed set of vanes installed inside the volute.
Optional. Increases pressure of the fluid exiting the impeller by decreasing its velocity. Guides the fluid tangentially into the volute. Minimizes energy loss from turbulence and impact.
Operation
Section titled “Operation”- Volute must be filled with fluid to start pumping
This process is called priming. - Fluid enters through the eye of the impeller
- and are increased when the fluid flows through the impeller
Performance characteristic
Section titled “Performance characteristic”