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Comparison Grundfos JPBasic 2PT vs Grundfos JP Basic 3 PT

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Grundfos JPBasic 2PT
Grundfos JP Basic 3 PT
Grundfos JPBasic 2PTGrundfos JP Basic 3 PT
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Suitable forclean waterclean water
Specs
Maximum performance
3000 L/h /maximum/
3600 L/h /maximum/
Maximum head
42 m /maximum/
47 m /maximum/
Max. pressure3 bar3 bar
Pump typecentrifugalcentrifugal
Suction typeself-primingself-priming
Suction height8 m7 m
Maximum liquid temperature40 °С40 °С
Volume of water pressure tank24 L24 L
Suction systemsingle-stagesingle-stage
Outlet size1"1"
Inlet hole size1"1"
Engine
Maximum power720 W850 W
Power sourceelectricelectric
Mains voltage230 V230 V
General specs
Country of originDenmarkDenmark
Pump housing materialcast ironcast iron
Impeller / auger materialplasticplastic
Water pressure tank materialsteelsteel
Dimensions305x509x543 mm543x305x509 mm
Weight18 kg19 kg
Added to E-Catalogdecember 2015november 2014

Maximum performance

The maximum volume of water that the device can pump in a certain amount of time. It is one of the key specs of any pump because characterizes the volume of water with which the device can work. At the same time, it does not always make sense to pursue maximum performance — after all, it significantly affects the dimensions and weight of the unit.

Some formulas allow you to derive optimal performance values for different situations. So, if the pump is designed to supply water to water intake points, its minimum required performance should not be lower than the highest total flow rate; if desired, a margin of 20-30% can be added to this value. And for sewer models (see "Suitable for"), everything will depend on the volume of wastewater. More detailed recommendations for choosing a pump depending on performance can be found in special sources.

Maximum head

The maximum head generated by the pump. This parameter is most often indicated in meters, by the height of the water column that the unit can create — in other words, by the height to which it can supply water. You can estimate the pressure created by the pump using a simple formula: every 10 m of head corresponds to a pressure of 1 bar.

It is worth choosing a pump according to this parameter, taking into account the height to which it should supply water, as well as adjusting for losses and the need for pressure in the water supply. To do this, it is necessary to determine the difference in height between the water level and the highest point of water intake, add another 10 to 30 m to this figure (depending on the pressure that needs to be obtained in the water supply), and multiply the result by 1.1 — this will be the minimum pressure required.

Suction height

The largest difference between the height of the pump and the height of the water level at which the pump can provide normal suction. Without special devices, the maximum value of this parameter is 7-8 m — this is due to the physics of the process. However, when using an ejector (see below), the suction height can be increased several times.

Maximum power

Rated power of the pump motor. The more powerful the engine, the higher the performance of the unit, usually, the greater the pressure, suction height, etc. Of course, these parameters largely depend on other features (primarily the pump type, see above); but models similar in design can be compared in terms of power.

Note that high power, usually, increases the size, weight and cost of the pump, and also implies high costs of electricity or fuel (see "Power source"). Therefore, it is worth choosing a pump according to this parameter taking into account the specific situation; more detailed recommendations can be found in special sources.
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