Which pump to choose for pumping water
I'm interested in a pump for pumping from a water channel to a height of 20 meters. I do not know what to choose and what characteristics are. Thank you in advance.
Muratbek
Expert Answer
Hello Muratbek!
To choose the right pump, you need to decide on just two of its characteristics - pressure and performance.
Pressure characterizes the height to which the unit can lift the fluid. When calculating this value, it is necessary to determine all parts of the system where pressure drop occurs and add them together. The main components are the distance from the water mirror to the surface, the pressure drop in the horizontal section of the pipeline and the rise to the water distribution point.
The calculation takes into account the coefficient of pressure loss in the pipeline, which is equal to 1.15, as well as the fact that on ten meters of the horizontal line the losses are about 1 m of the pump head. For example, if you want to supply water from a canal to a height of 20 m to a flow valve that is 20 m away from the reservoir and 5 m above the site level, then the pressure should be at least (20+ (20:10) +5) × 1.5 + 1.5 ... 3 = 32.55 ... 34.05 m. The last term 1.5 ... 3 m is selected on the basis of what pressure is required to be obtained at the point of distribution, otherwise water will flow in a thin stream from the tap.
As for productivity (consumption), everything is simple here - just determine how many liters of water your family will need per hour. According to statistics, for three to four people, an aggregate with a capacity of 800-1,000 liters per hour is enough.
When determining the type of pump, take into account the location of its installation and the depth of suction. So, surface pumps can be installed away from the source and raise water from a depth of 7-9 m, while self-priming ejection units operate at a distance of 50 meters or more from the water mirror. Due to the high cost of devices with an ejector, when lifting water from great depths, it is more rational to use vibrational submersible or centrifugal well pumps - they have proven themselves in work and have an affordable cost.
