Grundfos SQFlex Submersible Pumps
This pump lifts water up to 800 feet.
The SQFlex family is an environmentally-friendly water supply
SQFlex pumps are fitted with a permanent magnet motor
which enables the efficient use of energy from a wide range of
supply options. The pump system offers the perfect water supply
solution in remote areas where water is scarce and the power supply
is non-existent or unreliable.
Very flexible as to its energy
supply and performance, the SQFlex system can be combined and
adapted to any need according to the conditions on the installation
site. A battery backup system can store the extra energy generated
and take over when the primary energy source is not available.
SQFlex is more than just a pump – it's a complete system.
Thanks to its built-in electronics, the pump is compatible with both
DC and AC power supply without requiring an external inverter.
The complete range consists of eleven different pump sizes:
Five helical rotor pumps for applications where a high head is
required, and six centrifugal pumps for applications where a greater
flow rate is necessary.
Being designed for continuous, as well as intermittent
operation, the SQFlex system is especially suitable for water supply
applications in remote locations, such as:
- Villages, schools, hospitals, single-family homes, etc.
- Watering cattle
- Irrigation of fields and greenhouses
- Game parks and game farms
- Watering applications
- Conservation areas
- Surface water pumping
- Floating pump installations for pumping water from
ponds and lakes
Features and benefits
- Renewable energy supply: solar panels or wind turbines
- Built-in electronics, easy installation
- Reliable water supply
- Low operating costs
- Dry-running protection
- Built-in motor protection
- High Efficiency
- Maximum Power Point Tracking (MPPT)
- Wide voltage range
- Built-in sand shield
They can be directly powered by solar or wind power or can be run on an
inverter, a generator, a battery or the utility grid, or any combination of
these sources. Virtually any source of power, 30-300 VDC and 90-240 VAC can
be used to run the pump, and with the name Grundfos on it, you know it is
built to last and is maintenance-free. Some SQFlex pumps will fit into a 3"
Seven pump models can deliver from 4 GPM at 525 feet to 50 GPM at 20 feet
of head with 1 kilowatt solar array or less. Helical rotor pumps (models 3,
6 and 11) for high head applications and centrifugal pumps for low head
applications assure a pump that is efficient for any application. The SQFlex
has built-in protection from dry-running, overload and overheating.
The SQFlex pump can run on a solar arrays starting at 129 watts. The
array must have an operating voltage over 30 volts. The array can be made
any combination of 3 or more 12 volt nominal modules in series or 2 or more
24 volt nominal module.
Grundfos also has a specially designed Whisper 100, 1KW wind generator
with 150 VDC output for applications using wind power. Please contact us for
Poly pipe in rolls is acceptable instead of rigid pvc or galvanized,
because the slow start feature of the motor reduces startup torque and
twisting of the pipe.
The CU200 interface
box communicates with the pump and monitors operating conditions. Built-in
diagnostics indicate faults and dry-running, display operating status, power
consumption and water level switch input.
control to turn off the pump when a tank is full.
The IO101-115 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.
The IO102 interface
unit is used for systems powered exclusively by a wind turbine or by a
combination of wind and PV. You can use several
controls if you need more features than one control can provide.
Use the table below to choose a pump.