Description
Grundfos 11-SQF-2 SQFlex Helical Pump
Overview
The Grundfos 11-SQF-2 SQFlex Helical Pump is a 3" submersible positive-displacement helical rotor pump engineered for high-head, low-flow water applications. It is part of Grundfos’ SQFlex family — a renewable-energy-based water supply system that operates directly from solar panels, wind turbines, generators, or battery sources. Its integrated electronics allow flexible operation on both AC and DC power, ensuring continuous performance in remote or off-grid locations.
Designed for reliability and simplicity, the 11-SQF-2 utilizes a stainless-steel helical rotor and stator configuration for efficient water movement under high heads, with built-in protections for dry-running, over-voltage, over-temperature, and overload. It is ideal for homesteads, irrigation, livestock watering, and remote water supply where power availability fluctuates.
Key Features
- Operates on 30-300 VDC or 90-240 VAC — fully automatic voltage adaptation.
- Permanent-magnet motor with built-in Maximum Power Point Tracking (MPPT) for optimal solar performance.
- Constructed from AISI 304/316 stainless steel for maximum corrosion resistance.
- Dry-running, overload, over-temperature, and over/undervoltage protection built into the motor control electronics.
- Accepts solar, wind, generator, or battery inputs — no inverter required.
- Suitable for 3" minimum boreholes with simple vertical or horizontal installation.
- Low maintenance and long service life under demanding environmental conditions.
Applications
- Rural and off-grid domestic water supply
- Livestock watering and agricultural irrigation
- Community water systems (schools, clinics, villages)
- Remote monitoring stations and conservation areas
- Reservoir, pond, and lake water transfer
Industries & Use Cases
- Off-grid residential and agricultural installations
- Ranching and livestock operations
- Municipal and NGO-based water development projects
- Environmental and wildlife management zones
- Solar-powered irrigation and water security systems
Technical Specifications
| Model | Grundfos 11-SQF-2 SQFlex Helical Pump |
|---|---|
| Part Number | 95027335 |
| Technology | Positive-displacement helical rotor pump |
| Diameter | 3 in (76 mm) |
| Outlet Size | 1 ¼ in NPT |
| Maximum Head | ≈ 650 ft (198 m) |
| Maximum Flow | ≈ 11 GPM (2.5 m³/h) |
| Power Input (P1) | 1400 W max |
| Voltage Range | 30-300 VDC / 90-240 VAC, 50/60 Hz |
| Motor Type | Grundfos MSF 3 Permanent-Magnet Motor |
| Current (max) | 8.4 A |
| Speed Range | 500 – 3600 RPM (adaptive to load/power) |
| Enclosure | IP 68 submersible rating |
| Borehole Diameter (min) | 3 in (76 mm) |
| Installation Depth (max) | 500 ft below static water table (220 psi) |
| Liquid pH Range | 5 – 9 |
| Max Sand Content | 50 ppm |
| Material Construction | AISI 304/316 stainless steel, polyamide valve components |
| Dry-Running Protection | Water level electrode (12–24 in above pump) |
| Operating Temperature | 32 °F – 104 °F (0 °C – 40 °C) |
| Control Accessories | CU 200 Control Unit / IO 50/101/102 Switch Boxes / Charge Controller |
| Weight | Net 18 lb (8.2 kg) / Gross 22 lb (10 kg) |
Performance values per Grundfos SQFlex Product Guide and manufacturer data:contentReference[oaicite:2]{index=2}.
Warranty
Grundfos SQFlex pumps include a 2-year limited warranty covering defects in materials and workmanship when properly installed and operated per manufacturer guidelines. Optional extended warranty coverage is available through authorized Grundfos distributors.
B2B Add-On
Download the complete Grundfos SQFlex Product Guide and system configuration resources for solar, wind, and hybrid setups. CLICK HERE to access the manufacturer’s configuration tools and documentation.
