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Submersible Pumps The Lorentz pumps are the world's most economical water pump, and they are used in deep well pumping, pressurized and non-pressurized irrigation, home water systems and livestock watering. There are no limits to how large solar pumps can be built. But, they tend to be most competitive in small installations where combustion engines are least economical. Lorentz PS200

Characteristics Lift up to 165 feet (50 m) Flow rate up to 9.5 gpm (2.7 m3/h) Simple installation Maintenance-free High reliability and life expectancy Cost-effective pumping solution Application Drinking water supply Livestock watering Pond management Irrigation PS200 Controller One controller for array direct or battery powered operation, with system status indication Mounted above ground (no submerged electronic parts) Two control inputs for well probe (dry run protection) and remote control (float or pressure switch) Automatic reset 20 minutes after low water protection engages Protected against reverse polarity, overload and high temperature Speed control, maximum pump speed adjustable to reduce flow rate to approximately 30 % Solar operation: integrated MPPT (Maximum Power Point Tracking) Battery operation: low voltage disconnect and restart after battery has recovered Max. efficiency 88 % (motor + controller) Enclosure: IP 54 (sealed, weatherproof) Pump End (PE) Helical rotor pump (positive displacement pump) Two main parts only: stator and rotor, field serviceable Stator: geometry made of abrasion resistant rubber Rotor: stainless steel, hard chrome plated, abrasion resistant More resistant to damage by sand than other pump types Self-cleaning Motor ECDRIVE 600 HR Brushless DC motor No electronics inside motor Water filled IP 68, pressure balanced, max. submersion unlimited Dynamic slide bearings, material: carbon/ceramic Wetted material: stainless steel (AISI 316), POM, rubber, cable drinking water approved Sand and Silt Tolerance The pump (HR) has a higher resistance to wear from sand and clay than any other pump type. In properly constructed wells the amount of sand and clay is within the tolerance of the pump. A concentration of solids greater than 2 % (by volume) may cause blockage in the pump or the drop pipe, especially at low flow rates. Do not use the pump to clean out a dirty well. Pump Cable and Splice Standard submersible cable, 3-wire + ground (total four wires). Connection to the pump is made using industry standard splicing methods. Drop Pipe 1 1/4”, 1 1/2” or 2” NPT pump outlet. If water is dirty, consider a smaller size drop pipe to increase the flow velocity. This helps exhaust solid particles and prevent accumulation in the pipe. When considering reduced pipe size, consult a pipe sizing (friction loss) chart. Pipe can be of any standard material, rigid or flexible. A torque arrestor is not required. Temperature Limits Pump end, motor: water temperature up to +104 °F (+40 °C) Specify temperature range on order Controller: ambient temperature -22 to +131 °F (-30 to +55 °C) Warranty 2 years manufacturer’s warranty against defects in material and workmanship For pricing, specifications and availability, please contact us at 1-800-854-7191.

Grundfos SQFlex Submersible Pumps

This is the ultimate submersible pump for water lifts of up to 525 feet.  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 resources.  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" well.

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 for high head applications and centrifugal umps 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 array starting at 129 watts.  The array must have an operating voltage over 30 volts.  this array can be made any combination of 3 or more 12 volt nominal modules in series of 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 information.

Optional Controls

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.

The Water Level Switch interfaces with the CU200 control to turn off the pump when a tank is full.

The IO100 is a simple control box 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.

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 on control can provide.

The SQFlex pumps will not function with a GFCI in the supply circuit, and should not be used where a GFCI is required.

Use this table (click here) to choose a pump.  Left Column shows total head in feet and meters.  The top row shows array wattage/number and suggested type of modules.  Boxes show seasonal pump performance and maximum flow as shown in the sample box below.

Select the row with the head (total lift) that most closely matches your application.  Move across the row to the column that contains the desired daily volume or peak flow rate.  Note the pump model in the block and wattage of the PV array in that column.

**Note:  Daily volume and flow calculations are based on 38° North latitude location, fixed array tilt of 38° and 4.5 kWH/m2 (POA) winter, and 7.5 kWH/m2 (POA) summer solar insolation.  The pump model is optimized for summer operation.  Up to 40% more water can be pumped in the summer if the array is on a tracking mount.  The output can vary with different locations and years, and is not guaranteed.