The Grundfos SQE series consists of variable-speed controlled submersible pumps designed for high-efficiency deep-well water extraction. Combining the technical features of the SP/SPE series, they offer the following core advantages:
1. Intelligent Variable-Speed Control
Supports variable-speed operation (30–50 Hz / 30–60 Hz), dynamically adjusting pump speed based on actual demand to improve energy efficiency by over 30%.
Equipped with a CUE frequency converter to meet VFD input requirements; no additional sine-wave filter is needed (for cable lengths ≤300 m).
2. High-Efficiency, Energy-Saving Design
Features stainless steel impellers and an optimized hydraulic design, enabling high-head (up to 600 mWC) and high-flow operation.
Low-noise operation (<70 dB(A)), making it suitable for residential areas and noise-sensitive environments.
3. Durability and Reliability
Materials: Pump body made of EN 1.4401/1.4539 grade stainless steel; highly corrosion-resistant and suitable for liquids with sand content ≤50–150 ppm.
Motor Protection: Built-in temperature sensors (Pt100/Pt1000) and MP 204 protection unit provide safeguards against dry running, overload, and overheating.
4. Flexible Installation and Cooling
Supports vertical or horizontal installation; adaptable for deep wells, water tanks, and industrial systems.
Optional flow sleeve optimizes cooling for high-temperature liquids (up to 60°C), ensuring stable motor operation at low flow velocities (≥0.15 m/s).
5. Safety and Ease of Maintenance
Lightning Protection: Optional overvoltage protection devices prevent grid surges from damaging the motor.
Modular Structure: Designed for quick disassembly and maintenance, backed by a global service network.
6. Wide Range of Applications
Agricultural Irrigation: High-flow design meets the water supply needs of farmland.
Industrial Water Supply: Corrosion-resistant properties make it suitable for demanding environments such as chemical processing and pharmaceuticals.
Drinking Water Supply: Complies with sanitary standards; water quality safety can be ensured through clean-water flushing.