Pump Efficiency: centrifugal_split_case
Centrifugal and positive displacement pump efficiency data — BEP efficiency, head, specific speed, and impeller type by pump classification and flow rate
| pump type | flow gpm | description | efficiency pct (%) | head ft (ft) | hp range | impeller type | notes | specific speed ns (dimensionless) |
|---|---|---|---|---|---|---|---|---|
| centrifugal_split_case | 200 | Horizontal split case double suction centrifugal pump | 70 | 150 | 7.5-15 | radial | 1750 RPM. Double suction reduces axial thrust and improves NPSH. | 1,200 |
| centrifugal_split_case | 500 | Horizontal split case double suction centrifugal pump | 78 | 175 | 15-40 | radial | 1750 RPM. Common for fire pumps (NFPA 20) and water distribution. | 1,600 |
| centrifugal_split_case | 1,000 | Horizontal split case double suction centrifugal pump | 82 | 200 | 30-75 | francis | 1750 RPM. +2-5% efficiency over end suction at same flow. | 2,000 |
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