Centrifugal Pumps are classifies into three general categories :
Radial Flow - a centrifugal pump in which the pressure is developed wholly by centrifugal force.
Mixed Flow - a centrifugal pump in which the pressure is developed partly by centrifugal force and partly by the lift of the vanes of the impeller on the liquid.
Axial Flow - a centrifugal pump in which the pressure is developed by the propelling or lifting action of the vanes of the impeller on the liquid.