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Centrifugal pump is a type of pump used in low viscosity fluids. Therefore centrifugal pumps are widely used in the petroleum industry and power plants. At the Residual Fuel Catalytic Cracking (RFCC) there are 103-P-509A and 103-P-509B centrifugal pumps that function as cosolvent circulation media on the 103-V-503 vessel. To circulate cosolvent 103-P-509A and 103-P-509B pumps are arranged in parallel. While the operation of the 103-P-509A, pump impeller has become porous and destroyed. So it is necessary to know the actual performance of the 103-P-509B pump through analysis with analytical methods to process data and then compare it to the design performance. After calculating and comparing with the design performance, the differential head increases by 0.2 m, the decrease in NPSHa and NPSHr are 53.6 m and 0.62 m, and the pump efficiency decreases by 2%. Cosolvent circulation process does not experience interference, but the time needed to circulate cosolvent becomes longer. It can be concluded that the impeller pump 103-P-509B is in good condition.

Evaluation of single stage centrifugal pump performance 103-P-509B after 26300 hours of use