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Comparison Grundfos JPA 4-54 PT-H vs Grundfos JPA 4-47 PT-H

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Grundfos JPA 4-54 PT-H
Grundfos JPA 4-47 PT-H
Grundfos JPA 4-54 PT-HGrundfos JPA 4-47 PT-H
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Main
Low noise level. Cast iron pump. Tank made of stainless steel.
Suitable forclean waterclean water
Specs
Maximum performance
3600 L/h /maximum/
3600 L/h /maximum/
Maximum head
54 m /maximum/
47 m /maximum/
Max. pressure8 bar8 bar
Pump typecentrifugalcentrifugal
Suction typeself-primingself-priming
Suction height8 m8 m
Maximum liquid temperature35 °С35 °С
Volume of water pressure tank20 L20 L
Suction systemsingle-stagesingle-stage
Outlet size1"1"
Inlet hole size1"1"
Engine
Maximum power1130 W850 W
Power sourceelectricelectric
Mains voltage230 V230 V
General specs
Noise level70 dB77 dB
Protection class (IP)4444
Country of originDenmarkDenmark
Pump housing materialplasticcast iron
Impeller / auger materialplastic
plastic /composite/
Water pressure tank materialstainless steelstainless steel
Dimensions492x321x496 mm492x321x496 mm
Weight21 kg20 kg
Added to E-Catalogjanuary 2018january 2018

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 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.

Noise level

The noise level produced by the pump during normal operation. For comparison, 50 decibels roughly corresponds to the noise in an office room, 60 dB to an average TV volume, 70 dB to a truck at a distance of about 8 m, 80 dB to traffic noise, and 90 dB to a scream. The lower the noise level, the more comfortable the use of the pump and the closer it can be placed to people. This parameter is especially important for models designed for indoor installation.

Pump housing material

The material from which the pump housing is made. It is a structural element in which the working mechanism (impeller or auger) is installed. Note that the motor casing can be made of a different material — this is not important in this case; and in water pumps with the engine (see “Power source”), we are talking about the casing of the pump itself, and not about the support frame in which it is fixed.

The following options are most popular nowadays:

— Plastic. Inexpensive material that perfectly resists moisture and is not subject to corrosion. However, the reliability of plastic as a whole is not very high; the exception is special high-strength grades, but they are extremely rare in pumps (when strength is needed, metals are usually used). So plastic housing is mainly equipped with relatively simple and affordable models that are not designed for serious loads.

— Cast iron. An extremely popular material nowadays: cast iron is strong, reliable, durable and at the same time has a relatively low cost. However, in terms of corrosion resistance, this material is inferior to stainless steel (see below). Nevertheless, subject to the rules for operating the pump, the service life of the cast-iron housing is not inferior to the service life of most of the main components of the unit. Also note that such cases are quite massive, which makes transportation difficult; however, in some cases, a large weight is an advantage: it helps to dampen vibrati...ons.

— Stainless steel. By the name, one of the key advantages of stainless steel is high resistance to corrosion — and, accordingly, reliability and durability. On the other hand, this material also costs a little more than the same cast iron. The weight of such housing is somewhat less — this, again, can be both an advantage and a disadvantage, depending on the situation.

— Aluminium. Premium material. The aluminium alloys used in today's pumps are light, strong, durable, and virtually impervious to moisture, but cost accordingly.

— Brass. A fairly rare option found in some models of surface pumps. Brass is strong enough, reliable and resistant to moisture, but in most cases, it does not have key advantages over the same stainless steel or aluminium but costs a little more.

— Bronze. Another material similar to the brass described above is durable and practical but rarely used.

— Ceramics. A material found exclusively in sewage pumps in the form of toilet bowls (see "Pump design"). Most often, ceramics means vitreous china or more expensive and durable vitreous china — that is, the same materials as in ordinary toilets without built-in pumps.
Grundfos JPA 4-54 PT-H often compared
Grundfos JPA 4-47 PT-H often compared