Description
The Grundfos 09051K18 is a Submersible Borehole Pump — Stainless Steel. Submersible pumps for groundwater supply, irrigation, and borehole installations. All stainless steel EN 1.4301. Nominal performance: 8.81US gpm at 236.2ft. Rated 380-400-415V, 3-Phase, 50 Hz. Applications include Residential groundwater intake, Residential water pressure boosting, Municipal wells and more.
4" Borehole Design
SP is engineered for 4-inch wells — the most common residential and light commercial borehole diameter in North America. Confirmed fit before installation.
All Stainless Steel
Motor, shaft, stages, and column pipe in stainless steel. No corrosion in groundwater regardless of pH, iron content, or chloride levels.
Sandtight Construction
Sand guard and tight tolerances prevent abrasive particles from entering the motor or stages. Extended life in sandy aquifer conditions.
Wide Range — 60 Hz Models Available
SP covers 0.5 to 125 HP across dozens of frame sizes for residential through municipal borehole supply. Confirm 60 Hz model for US installations.
MS6/MS4 Motor Integration
SP pumps pair with Grundfos MS4 and MS6 submersible motors. Matched set from one manufacturer — one warranty, one technical support contact.
Authorized Distributor
PumpStop stocks and sources Grundfos SP pumps and MS motors. Contact for sizing, lead time, and technical selection support.
| Model Number | 09051K18 |
| Product Series | SP |
| Series Description | Submersible Borehole Pump — Stainless Steel |
| Power | 1HP |
| Voltage | 380-400-415V |
| Phase | 3-Phase |
| Frequency | 50 Hz |
| Motor Speed | 2850-2860-2870rpm |
| Pump Speed | 2900rpm |
| Full Load Current | 2.15-2.30-2.40A |
| Motor Type | MS402 |
| Insulation Class | B |
| Protection Class (IP) | IP68 |
| Nominal Flow | 8.81US gpm |
| Nominal Head | 236.2ft |
| Max Operating Pressure | 217.56psi |
| Max Fluid Temperature | 104°F |
| Nominal Pipe Bore | 1 1/4inch |
| Pipe Standard | Rp |
| Impeller Material | Stainless steel |
| Approvals / Certifications | CE, EAC, UKCA, SEPRO, MOROCCO |
| Electrical | Verify supply voltage, phase, and frequency match nameplate before installation: 380-400-415V, 3-Phase, 50 Hz. |
| Temperature limits | Do not exceed max fluid temperature 104°F. Exceeding limits damages seals and motor insulation. |
| Dry running | Do not run dry. SP pumps use the pumped fluid to lubricate the shaft seal. Dry running destroys the seal within seconds. Install dry-run protection on all automatic installations. |
| Maintenance | Refer to the Grundfos Installation and Operating Manual (IOM) for correct installation, commissioning, and maintenance. Contact PumpStop for documentation. |
- EAN
- 5700391258527
- Approvals
- WEEE
- Approvals for drinking water
- ACS
- Built-in motor protection
- NONE
- Built-in temp. transmitter
- no
- Cable type
- FLAT
- Connection
- 1 1/4 inch
- Curve tolerance
- ISO9906:2012 3B
- Density
- 62.29 lb/ft³
- Diameter
- 4.13 in
- Enclosure class (IEC 34-5)
- IP68
- Environmental approvals
- WEEE
- Gross weight
- 33.1 lb
- Impeller
- Stainless steel
- Impellers
- NONE
- Insulation class (IEC 85)
- B
- Length of cable
- 1.7 m
- Liquid temperature range
- 5 .. 104 °F
- Mains frequency
- 50 Hz
- Material Pricing Group
- 23
- Maximum operating pressure
- 15 bar
- Maximum outlet pressure
- 10.8 bar
- Minimum borehole diameter
- 105 mm
- Minimum efficiency index, MEI ≥
- 0.7
- Model
- A
- Motor
- Stainless steel
- Motor diameter
- 4 inch
- Motor flange design
- Grundfos
- Motor type
- MS402
- Motor version
- T40
- Net weight
- 30.0 lb
- Number of reduced-diameter impellers
- NONE
- Power cable type
- FLAT
- Power factor 1
- 0.75-0.72-0.65
- Pump
- Stainless steel
- Pump speed on which pump data are based
- 2900 rpm
- Pumped liquid
- Water
- Rated current
- 2.15-2.30-2.40 A
- Rated flow
- 8.81 US gpm
- Rated head
- 236.2 ft
- Rated power - P2
- 0.75 kW
- Rated speed
- 2850-2860-2870 rpm
- Rated voltage
- 3 x 380-400-415 V
- Real Time
- Delivery date to be confirmed on Sales Order Update with real time availability and Net price
- Return valve
- NO
- Selected liquid temperature
- 68 °F
- Shaft seal for motor
- LIPSEAL
- Size of connection
- 1 1/4 inch
- Stages
- 18
- Start. method
- direct-on-line
- Starting current
- 480-490-480 %
- Thermal protec
- external
- Type
- FLAT
- Type of connection
- Rp
- Valve
- NO
- Version
- T40
- Windings
- Enamelled
Dimensional Drawing
Wiring Diagram
