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Dankoff 2920 Ultra-Efficient Booster Pump, 115VAC

Dankoff 2920 Ultra-Efficient Booster Pump, 115VAC
Dankoff 2920 Ultra-Efficient Booster Pump, 115VAC
Item code Model number
DAKFL-2920-115 Dankoff Solar 2920-115VAC

These pumps are not for use in PV-direct applications. You must either use a battery or AC power to power the pump.

Dankoff SolarDankoff Solar
Flowlight Booster Pump

Use DC or AC power to pressurize water. Provides 3-4.5 Gallons per Minute (10-17 lpm) at pressure as high as 65 PSI (4.5 kg/sq. cm) from shallow water sources.

  • Dankoff Flowlight  Booster Pump The Flowlight Booster Pump provides city water pressure, anywhere. It has been a standard in home renewable energy systems since 1986. It is economical for domestic water supply, drip irrigation, and water purification.
  • A booster pump is far more cost effective than an elevated tank, providing pressure equivalent to over 100 feet (30m) of elevation.
  • This DC pump uses one third to one half the energy of a conventional AC pump, and eliminates the high starting surges that push inverters to the limit.
  • It is more powerful, quieter, and much more durable than plastic RV/Marine pumps.
  • Wearing parts are replaceable, and typically last 5 to 10 years. Overall life expectancy is 15 to 20 years.
  • Its complete instruction manual and Easy Installation Kit make this pump simple for anyone to install and service, with no previous experience

"Over the last five years, we've found our Flowlight pump to perform impressively. If installed properly and filtered, they are very faithful pumps." --- J.T., Nemia Valley, British Columbia, Canada

"Our (Flowlight Booster Pump) has had 2 1/2 years of daily use. I have no complaints at all. It works really fine." --- G.O., Willow, Alaska

"It's a delight to be weaned from the generator." ---C.H., Coulterville, California

Specifications

 
Standard Model 2920-V
Low Speed Model 2910-V *
Pressure - PSI
(kg/sq cm)
30 (2.1)
40 (2.8)
50 (3.5)
65 (4.6)
30 (2.1)
40 (2.8)
50 (3.5)
65 (4.6)
Flow Rate -
G PM (lpm)
4.5 (17)
4.3 (17)
4.3 (16)
4.1 (15)
3.4 (13)
3.3 (12)
3.1 (12)
2.7 (10)
Current Draw - AMPS 12V
13
15
16
22
10
11
12
15
AMPS 24V
6.5
7.5
8
11
5
5.5
6
7.5
AMPS 115VAC
1.7
2.0
2.1
2.9
AV and 48V not available
Watt-Hours
Per Gallon (per ltr) Pumped
0.6 ((0.16)
0.67 (0.18)
0.75 (0.3)
1.1 (0.3)
0.6 (0.16)
0.67 (0.18)
0.75
1.1 (0.3)

Capacity

* Suction Lift: Low Speed Model 20 vertical feet (6 m); Standard Model 10 Feet (3 m) at sea level -- subtract 1 ft. for every 1000 ft. altitude (1 m for every 1000 m)

Note: Suction capacity may be further limited by intake pipe friction. Excessive suction causes cavitation (vapor bubbles) creating noise and
excessive wear. Intake piping should be 1 inch or larger. Pump should be mounted as close to the water source as possible.

Choice of Capacity

* Standard Model for highest flow
* Low Speed Model (DC only) is best if:

- Suction lift greater is than 10 feet
- Intake pipe is smaller than 1-inch size
- Extra-quiet operation is desired

Choice of Voltage

* 12 or 24 Volt DC, others (inquire)
* 115 Volt AC (low surge PM motor minimizes inverter and wire size)

Construction

* Rotary vane pump mechanism (pulsation-free)
* Solid forged brass pump body with carbon-graphite and stainless steel working parts
* NSF® approved for drinking water
* Handles sea water and dissolved minerals
* Survives most freezes
* Permanent magnet, ball bearing DC motor, thermally protected
* Clear flexible hoses and pressure relief valve included

Additional Needs

* Battery-based power system (12V or 24V) or AC (minimum 300 watt inverter)
* Pressure Tank, captive air type. Minimum size: 40 gallon (150 l). Larger is better, to reduce cycling and increase reserve capacity.
Available locally.
* Foot valve (if pump is placed higher than water source)

Filtration Requirement

* The Flowlight Booster Pump CANNOT tolerate dirt. Water must be filtered <10 microns.

Accessories

* Intake Strainer/Foot Valve with fine monel metal screen, stops course debris
* Inline cartridge holder (10-inch) uses standard drinking water cartridges
* 10" filter cartridges (2 pack ) for above cartridge holder.
* Intake Filter/Foot Valve (30-inch) replaces Intake Strainer and Inline Filter (10 micron) with a single unit, best for lowering into a shallow well
* Spare 30" Filter Cartridges (5 or 10 micron spun fiber)
* Easy Installation Kit includes: Pressure Switch, Pressure Gauge, Check , Drain & Shut-Off Valves, & Tank Tee (manifold)
* Dry Run Switch prevents battery drain and pump damage if water source
runs dry

Installation
* Pump may be mounted horizontally or vertically.
* Pump must not be submerged
* It may be placed inside a 6-inch (120 cm) or larger well casing, suspended by a rope. If casing is smaller than 10 inches, request "adapting elbows" instead of flex hoses

Dimensions

* Length 16.5 in (42 cm)
* Weight 15 lb (7 kg)
* Flexible hose ends have 3/4-in. male pipe thread

Warranty

* 1 year against defects in materials and workmanship. Use of pump without 10 micron or less filter will void warranty.

 

Surface Pumps Comparison
Surface pumps for lifting and/or pressurizing water / 1 PSI = 2.307 ft. of
Surface Pumps Min Lift (ft) Max Lift (ft) Min Lift (PSI) Max Lift (PSI) Min GPM Max GPM Pump Type Dirt Tolerant Filtration Required Dry-run Tolerant
Solar Slowpumps 15xxx*
0 440 0 191 0.4 4 rotary vane N 10 mic N
Solar Slowpumps 14xx and 26xx
160 440 69 191 1 4 rotary vane N 10 mic N
Flowlight Booster Pumps 16xxx**
69 150 30 65 3 4 rotary vane N 10 mic N
SunCentric Pumps 7xxx
0 90 0 39 5 70 centrifugal high N Y
SolarForce PistonPumps 30xx
0 220 0 95 4 9 piston medium N Y
Solaram Pumps 8xxx
0 960 0 416 3 9 diaphragm medium N Y

 

*formerly 13xx and 25xx

**formerly 29xx

 

Dankoff Solar


Here are some tips from the altE staff

  • Why should I get a pressure tank?
    • Pressure tanks serve two useful purposes. First, when pumps move water, they tend to create a pulsing effect on the flow. So when you go to turn on your faucet, the water can sort of jiggle back and forth, which can be annoying. A pressure tank eliminates the pulsing effect. The second reason is that the tank reduces the number of on/off cycles of the pump. With a properly sized pressure tank, the tank will be able to handle enough volume of water and pressure such that the pump won't have to turn on every time one turns the water on. For example, one could wash one's hands and the amount of water it would take would only reduce the pressure a slight amount and the pump wouldn't need to turn on. By reducing the amount of on/off cycles for the pump, the life of the pump is extended.

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