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Comparison Grundfos JP 6 with tank vs Grundfos Hydrojet JPB 6/80L

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Grundfos JP 6 with tank
Grundfos Hydrojet JPB 6/80L
Grundfos JP 6 with tankGrundfos Hydrojet JPB 6/80L
from $248.40 up to $292.87
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from $392.12 up to $496.55
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Suitable forclean waterclean water
Specs
Maximum performance
4500 L/h /maximum/
4000 L/h /maximum/
Maximum head
50 m /maximum/
48 m /maximum/
Max. pressure6 bar6 bar
Pump typecentrifugalcentrifugal
Suction typeself-primingself-priming
Suction height8 m8 m
Maximum liquid temperature40 °С55 °С
Ejector
Volume of water pressure tank24 L80 L
Suction systemsingle-stagesingle-stage
Outlet size1"1"
Inlet hole size1"1"
Engine
Maximum power1400 W1400 W
Power sourceelectricelectric
Mains voltage230 V230 V
General specs
Country of originDenmarkDenmark
Pump housing materialstainless steelstainless steel
Impeller / auger materialstainless steelstainless steel
Water pressure tank materialsteelsteel
Weight33.5 kg
Added to E-Catalognovember 2014november 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.

Maximum liquid temperature

The highest temperature of water at which the pump is capable of operating normally. Usually, in most models this parameter is 35-40 °C — at high temperatures it is difficult to ensure effective cooling of the engine and moving parts, and in fact, such conditions are rare.

Ejector

The presence of an ejector in the design or delivery set of the pump.

The main purpose of the ejector is to increase the effective suction height. Its action is based on the fact that part of the water pumped by the pump is sent back down to the intake point; this water in some way "pushes" the water in the main suction line. Thanks to this, the suction height can be increased from 7-8 m, available without an ejector, to 15-20 m. The main disadvantage of this device is a rather high noise level.

Volume of water pressure tank

The volume of the water pressure tank provided in the design of the pressure tank unit.

A water pressure tank is a reservoir capable of holding a certain volume of water. It performs several functions at once. The main ones are: firstly, maintaining a stable pressure; secondly, protection against water hammer; and thirdly, storage of an “emergency” supply of water in case of a power outage, pump breakdown, etc. The larger the volume of this tank, the better it handles its capabilities; on the other hand, a large capacity significantly affects the dimensions and cost of the tank. Therefore, it does not always make sense to look for a pump with the maximum volume of the water pressure tank. Specific recommendations on choosing the optimal volume for different situations can be found in special sources.
Grundfos JP 6 with tank often compared