Top 10 Best Circulator 2020

Difficult to make a choice for your new Circulator? We wrote this special Circulator buying guide to help you, with the TOP10 of the best sales of the moment, tests, opinions… As in all our buying guides, we have done our best to help you choose the best Circulator!

Our selection of circulator

Circulator buying guide

Little known in the heating industry, the Circulator still plays a very important role. It is a complex drainage system whose operation determines the quality of heating in homes. This article will tell you the basics you need to know about this electrical equipment in order to make the best choice.

What is a circulator?

It is a pump installed in a heating system, the role of which is to drain the heat transfer liquid which warms the apartment. In the vast majority of cases, the liquid in question is water. This water is conveyed at a defined pressure (expressed in bar or in pascal) coupled with a flow rate (which is expressed in cubic meters of water per hour or in liters per second) to the central heating and in the opposite direction. The main characteristic of circulators is that they operate at variable (three levels are often available) or constant speeds. 

The different types of circulators

It is important to know the different types of circulators to be able to make a comparison yourself when you want to buy them. Having this knowledge is also useful when testing multiple models in the purchasing process. Basically, there are two types of circulators that can be installed on heaters.

  • The wet rotor circulator is the most common on installations. It has the particularity of cooling itself down thanks to the water that it drains itself. This is because the rotor running full time overheats. But by the way, the water leaches it so it doesn't exceed a certain temperature. This Circulator is installed directly on the piping and has the advantage of not being expensive in terms of maintenance.
  • Like its counterpart, the in-line pump is also installed directly on the piping. The main difference is in the cooling system. Instead of water, a fan built into the device takes care of it. This is due to the fact that the pump is separated from the machine motor by a seal, unlike the previous configuration.

Why do you need to properly adjust your circulator?

Still called Circulator boiler, the flow and pressure relationship must be perfectly established to optimize its operation. This is important because, if the power generated by the circulator is much more than it should be, the engine will simply run on no load. The consequence of this is that the machine generates significant consumption of electrical energy.

Likewise, the coolant is no longer drained properly to the heaters (radiators, central heating, floors), causing them to malfunction. And when these cases do occur, which is often noticed, are unwanted noises emanating from the engines of the Circulator, and which can create noise pollution.

It is for these reasons that it is very important to be able to find the exact bridge between the different pressure and flow data of the machine. Also, to get there a little more easily, it is advisable to make the effort to turn to circulators which offer several levels of speed, whether they are constant or variable.

How to choose your circulator?

If you are not a professional in the field, it is best to let someone who really knows how to help you make the best choice. The data and aspects to be taken into account are sufficiently complex.

  • It is essential to be able to calculate the flow rate of the circulator. For that, it is necessary to make use of this formula: X = P / Delta x Cm. In this equation, P refers to the power of the generator, it is expressed in kW. As for Delta, it represents the temperature difference that exists between the flow and return of the coolant to the engine of the Circulator. Cm represents what is called specific heat, which is equivalent to 1.163 kWh / t.K.
  • In addition to the flow, the water pressure must be determined. This calculation is equivalent to the total sum of the pressure drops. The operation is done on the longest loop that the circulator will be able to overcome.
  • The last point is all the more important as you need to have a refined knowledge of it to get out of it. Indeed, it turns out that there is, for each circulator, a curve drawn by the machine manufacturer. It is never the same from machine to machine. You will therefore report the two previous data on the curves in question in order to determine if you are in the presence of the correct one. Circulator for your installation. Apart from the best yield point accessible on the curve, zone 2 is the so-called functional one. Therefore, if your reported data falls in this area, you have found the right circulator.

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Dernière mise à jour : 2020-11-23 02:31:44