Centrifugal pump performance is visually represented by characteristic curves, which illustrate how the pump behaves at different flow rates. These curves commonly show the relationship between head (H) and flow (Q), as well as efficiency, power input, and the required Net Positive Suction Head (NPSHr). Understanding these curves is important for selecting the right pump, operating it effectively, and troubleshooting any issues.
For the purpose of this explanation, we will focus solely on the head-flow (H-Q) curves.
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