28-meter two-inch submersible pump

General definition
The 28-meter two-inch submersible pump is a type of submerged centrifugal pump designed to transfer water from wells, reservoirs, ponds and canals to medium depth (about 28 meters of water column). 
The name "floor pump" is because it can pump even water from a low height (on the floor).

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Common technical specifications
(these values ​​vary slightly depending on the brand)
| Feature | The usual value |
|G
| Output diameter | 2 inches (50 mm) |
| Pumping height (head) | 28 meters |
| Maximum discharge (watering) | About 15 to 24 cubic meters per hour engine power | 1.5 to 2 horsepower (1.1 to 1.5 kW) |
| supply voltage | 220 V (single phase) or 380 V (three phase) |
| Type of body | Cast aluminum or stainless steel (depending on the model) |
| kind of butterfly | Brass or Noril (industrial resistant plastic) |
| cooling system | with the flow of water around the body (Cooling Jacket) |
| Type of pumpable water | Clean or relatively clean water (without sand and coarse particles) |

Applications
- Draining water from shallow wells (up to about 25-30 meters)
- Irrigation of agricultural lands
- Draining water from swimming pools, tankers or ponds
- Use in construction and drilling projects
- Pumping water from reservoirs of towers or houses

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Important points in choosing
1. Pumping height (head) must correspond to the depth of the well (28 m = maximum height, not installation depth).  2. Diameter of the outlet pipe should be selected according to the pump (2 inches) so that the pressure drop does not increase.  3. If using in a narrow well, be sure to check the diameter of the pump body (usually about 4 to 5 inches).  4. Be sure to use a phase and thermal control protector for the motor. 

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Famous brands in the Iranian market
- Pempiran model 290/2F (made in Tabriz - industrial and high quality)
- Electrogen model F2-28
- LEO
- STREAM
- Flora-Dab-Abara (Italy or China assembly)

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Installation and maintenance method
- The pump should be vertically immersed in water. 
- Use a protective electrical panel to prevent burning in dry operation. 
- standard waterproof wire and cable (usually a 10-meter cable) must be installed on the pump from the beginning.