Multiobjective Optimization Design and Performance Prediction of Centrifugal Pump Based on Orthogonal Test

Figure 5

External characteristics test bench. (1) Water tank. (2) Vacuum control valve. (3) Inlet control valve. (4) Vacuum table. (5) Pressure gauge. (6) Flow meter. (7) Flow control valve. (8) Test pump. (9) Motor. (10) Water tank.