Grundfos | SQ Flex Submersible Pump – 3SQF-3 – up to 655′ lift (2 week lead time)
SQFlex 3SQF-3 Submersible Helical Rotor Pump 2.7 GPM 655 ft
The Grundfos SQFlex 3SQF-3 is a submersible helical rotor pump designed for high-head water pumping applications. It delivers up to 2.7 GPM and lifts water up to 655 feet. The pump supports 30–300V DC and 90–240V AC power sources, allowing operation with solar, wind, battery, inverter, generator, or utility power. Its compact 2.9-inch body fits wells 3 inches or larger and includes protection against dry running, overload, and overheating.
KEY FEATURES
- Delivers up to 2.7 GPM with a maximum lift of 655 feet.
- Helical rotor design is optimized for high-head pumping applications.
- Supports 30–300V DC and 90–240V AC power sources.
- Can operate from solar, wind, battery, inverter, generator, or utility power.
- Supports direct solar operation with an array starting at 129W.
- Requires solar array operating voltage above 30V for direct solar operation.
- Built-in protection helps guard against dry running, overload, and overheating.
- Compact 2.9-inch pump body fits wells 3 inches or larger.
- Compatible with optional CU200, IO50, IO100, IO101, and float switch controls.
- Higher solar array voltages can optimize pump performance and reduce required wire size.
Optional Controls:
- The CU200 interface box communicates with the pump and monitors operating conditions. Built-in diagnostics indicate faults and low water shut off, display operating status, power consumption and float switch input.
- The Float Switch interfaces with the CU200 control to turn off the pump when a tank is full.
- The IO50 and IO100 are simple control boxes with cable terminations and a manual on/off switch. It is a great interface between a solar array and the pump to allow you to turn off the high voltage array when working on the pump.
- The IO101 is an interface for using AC backup on a solar pump. An automatic transfer switch disconnects the solar array when AC power from a generator, utility connection or inverter is present. When AC power stops, it automatically reconnects the array to let the sun continue pumping.
You can use several controls if you need more features than one control can provide.
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