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The work presented in this paper is concerned with the development of a performance prediction method for centrifugal pumps. Many formulae that have been used to predict pumps likely performance are based on expressions developed originally for centrifugal compressors, these were modified for pumps by removing the compressibility flow effects. Additional pump loss correlations were re-written and directly applied to typical pump geometries. Experimental performance measurements of seven centrifugal rotors have been compared with analytical predictions using the proposed method, the results were encouraging.