Grundfos SP 1A-28 Submersible Borehole Pump – 8007428 (1 x 240V, MS402/RSIR Motor)
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The Grundfos SP 1A-28 (8007428) is a stainless-steel submersible borehole pump for pumping clean water in domestic, agricultural, and community water systems. All steel components are made from EN 1.4301 (AISI 304), ensuring high corrosion resistance. Approved for drinking water (ACS, DM174), the pump is fitted with a 0.75 kW MS402 motor (1-phase RSIR/CSIR) with sand shield, lip seal, water-lubricated journal bearings, and a volume compensating diaphragm. The canned motor offers high mechanical stability and efficiency, suitable for water temperatures up to 40 °C. The pump supports direct-on-line (DOL) starting and can be installed vertically or horizontally.
Applications & Features
- Domestic groundwater intake and pressure boosting
- Irrigation systems: rotor, spray, pivot, and lateral
- Community and municipal water supply
- Livestock and wildlife watering
- Groundwater transfer and frost protection
- Water treatment, fertigation, chemigation & dosing
- Solar boosting and solar-powered water solutions
- Drinking water approved (ACS, DM174)
Key Specifications:
| Product No. | 8007428 |
| Pump Type | Submersible Borehole Pump |
| Rated Flow | 1 m³/h |
| Rated Head | 110 m |
| Stages | 28 |
| Motor Type | MS402 (1-phase RSIR/CSIR) |
| Rated Power (P2) | 0.75 kW |
| Voltage | 1 x 240 V, 50 Hz |
| Rated Current | 7 A |
| Starting Current | 780 % |
| Cos φ – Power Factor | 0.79 |
| Motor Diameter | 4 inch |
| Connection Size | Rp 1 1/4 inch |
| Maximum Outlet Pressure | 16.7 bar |
| Material | Stainless Steel (EN 1.4301 / AISI 304) |
| Ingress Protection | IP68 |
| Net Weight | 17.2 kg |
Documentation & Downloads:
| Document | Download |
|---|---|
| Flow Sleeves (Quick Guide) | 📄 Download PDF |
| SP – Installation & Operating Instructions | 📄 Download PDF |
| SP A & SP Pumps – Data Booklet | 📄 Download PDF |
| SP Accessories – Data Booklet | 📄 Download PDF |