Traditional deep well applications where water pressure regulation is achieved through installing a well tank and a pressure switch will require a well pump such as Grundfos SQ series.
Packed with features such as rugged design, improved sand handling capabilities, dry-run & overload voltage/temperature protection, high efficiencies, soft start, multi-frequency capabilities (50-60Hz) and replaceable motor head, Grundfos SQ series well pumps are a better alternative to 4" pumps produced by many competitors and are the best choice for reliable and long-lasting performance. Additionally, the following features are standard on all Grundfos SQ models:
· 304 Stainless Steel construction
· 3" pump/motor for 3" or larger wells
· 2-wire design
Applications:
Typical applications of Grundfos SQ series pumps include residential & light commercial domestic water supply, irrigation, boosting and tank applications. As long as the well has enough plain water to yield and the pump is properly sized, Grundfos SQ well pump will work.
Why Grundfos SQ?
The well pump market today has a large selection of pumps from various manufacturers at various prices. So, what makes Grundfos well pumps different?
1. The pump is 3" and is suitable for 3" wells, which are less expensive to drill.
2. Hydraulic pump components of the Grundfos SQ pump are designed to consume less energy.
3. Unmatched wear resistance - Grundfos well pumps have "floating" impellers, which are not fastened directly to the motor shaft, but rather each has it's own tungsten carbide/ceramic bearing.
4. Upthrust protection in Grundfos well pumps is critical, as it protects both pump and motor from premature breakdown.
And many, many others.
How to read a Grundfos SQ pump?
Example: 10SQ05-160 model
10 - Rated flow in GPM (gallons per minute)
SQ - represents SQ series
05 - HorsePower (3/4 HP model will have "07", 1 HP - "10", etc.)
160 - Total Dynamic Head, or TDH of pump in ft of head.
What is TDH?
TDH is an abbreviation from Total Dynamic Head used to represent the maximum head of the pump and is measured in ft of head. TDH = Dynamic Head + Required System Pressure + Friction Loss + Elevation Above Grade.
Note: System Pressure must be converted from PSI to ft of head first. (1 PSI equals 2.31 ft of head)
Friction loss can be calculated by using pressure drop table supplied by the manufacturer of pipes used for well casing. Flow rate should be the pumps' max. rated flow.
