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A rotodynamic pump is a kinetic machine in which energy is continuously imparted to the pumped fluid by means of a rotating impeller, propeller, or rotor, in contrast to a positive displacement pump in which a fluid is moved by trapping a fixed amount of fluid and forcing the trapped volume into the pump's discharge. Examples of rotodynamic pumps include adding kinetic energy to a fluid such as by using a centrifugal pump to increase fluid velocity or pressure.
- Hydraulic Institute's definition of rotodynamic pump: http://www.pumps.org/content_detail_pumps.aspx?id=1768
A Rotodynamic pump is not to be confused with Roto Dynamics Inc; a rotational molding company located in Orange County, California.
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