The Grundfos 45S250-57 (product number 98924609) is a SP9 stainless steel submersible well pump rated 47.1 US gpm at 1408 ft across 57 stages, supplied complete with a three phase Grundfos MS6000 submersible motor.
Performance Curve
Official Grundfos curve — 60 Hz, water at 68 °F. Head (H) and efficiency (η) against flow (Q); lower chart shows power and NPSH required.
Performance & Hydraulic Data
| Rated flow | 47.1 US gpm |
| Rated head | 1408 ft |
| Stages | 57 |
| Pump speed (data basis) | 3450 rpm |
| Pump type | SP9 |
| US designation | SP9-57 |
| Maximum operating pressure | 870.23 psi |
| Maximum outlet pressure | 787.55 psi |
| Built-in return valve | Yes |
| Curve tolerance | ISO9906:2012 3B |
Materials of Construction
| Pump housing | Stainless steel — EN 1.4301 — AISI 304 |
| Impellers | Stainless steel — EN 1.4301 — AISI 304 |
| Motor material | Stainless steel — 1.4301 — 304 |
Installation & Connections
| Discharge connection | 2 NPT(M) |
| Motor diameter | 6 inch |
| Minimum borehole diameter | 5.71 in |
| Overall length | 167 in |
| Liquid temperature range | 5 °F to 104 °F |
Motor & Electrical Data
| Motor power (P2) | 25 HP |
| Voltage & phase | 440-460-480 V, three phase |
| Frequency | 60 Hz |
| Rated current | 41.0-40.0-39.5 A |
| Starting current | 540-590-620 A |
| Service factor | 1.15 |
| Insulation class | F |
| Starting method | direct-on-line |
| Enclosure class | IP68 |
| Grundfos motor number | 96166167 |
Approvals, Weights & Identification
| Approvals | CULDWUS,CCSAUS |
| Drinking water | PROP65 |
| Grundfos product number | 98924609 |
| EAN | 5712603665931 |
| Net weight (pump + motor) | 273 lb |
| Gross (shipping) weight | 394 lb |
| Country of origin | United States |
| HS / customs tariff code | 8413.70.2004 |
Typical Applications
Well and borehole water supply • groundwater abstraction • irrigation • pressure boosting • livestock and rural water • industrial process water.
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