Introduction Pumps are machines which adds to the energy of a liquid or gas causing an increase in its pressure and thus movement of the fluid. One of its type is centrifugal pumps,these are Roto-dynamic pumps and not self primed and used mostly for low and moderate pressure range.These are basically radial flow or axial flow type(here we are discussing radial type). Lets start with its working principle Water is led to the suction eye of the rotating impeller. The water gains energy by the centrifugal action of the pump and is discharged to the volute outlet casing. The volute is created by increasing the area of the outlet port and is greatest at outlet from the pump. By this design the kinetic energy of the water is converted to pressure energy. Construction Impeller Impeller is the rotating part inside the pump casing.It consists of series of backward curved vanes and mounted on a shaft which is connected to the shaft of a prime mover. Casing Air tight passage surroundi...