Abstract: Centrifugal pumps are used widely for hydraulic transportation of liquids through pipelines where the requirement of head and discharge are moderate. This paper presents the design of impeller and casing of single suction centrifugal pump and performance analysis of losses. The impeller and the casing are a rotating component and a stationary component. Water enters axial flow through the impeller eyes and exits radial flow in centrifugal pump. The pump casing is to control the liquid to the impeller, transfers into pressure the high velocity kinetic energy of the flow from the impeller discharge and leaves liquid away of the energy having imparted to the liquid comes from the volute casing. The design calculation and performance analysis of single suction centrifugal pump are describe because it is the most essential useful mechanical dynamic machine in fluid works which used for water supply plants, irrigation, industry, steam power plants, hydraulic power service, mine and river water pumping system,