To select the right radiator for a heating system, it is highly desirable to know its main technical parameters. Otherwise, you can not get the result that we would like. The most important indicators for radiators are not so many, so it's easy for amateurs to understand them. Take, for example, steel heating radiators, the technical characteristics of which we consider in this material.
High processability of steel does not require proof. This plastic, durable, flexible and ductile material lends itself well to welding, and also conducts heat remarkably. So for steel radiators are suitable in many ways.
Two types of steel radiators are produced:
In the middle of this device are one, two or three panels. Each of them consists of two steel flat profiles welded along the contour for joining. The plates are stamped, after which oval vertical channels are formed on them - paths for the coolant. The production of these radiators is simple - roller welding connects stamped blanks. After that, the finished parts are sealed in two pieces with the help of nozzles.
The device is a steel convector radiator.
To increase heat transfer, manufacturers often equip panels with a wrong side with U-shaped fins. For their manufacture are taken thinner sheets of steel than for the panels. The ribs promote convection enhancement. If several panels are connected in a row, then they are covered on both sides with covers. Depending on the number of heating and convector panels inside the radiators, the following types exist.
Type 10 is a single-row radiator without a convector and without cladding.
Type 11 - single-row radiator with one convector, without upper lattice.
Type 20 - a two-row radiator without a convector, with an air discharge grille .
Type 21 - a two-row radiator with one convector fins, closed casing.
Type 22 - two-row radiator with two convector fins, closed casing.
Type 30 - three-row, without convector fins, top closed lattice.
Type 33 - three-row radiator with three convector fins, closed casing.
As you understand, the heat transfer will depend on the type of radiator. Type 10 and 11 radiators do not have convection and are able to give off heat only by heating the air.
The finished radiator is quite narrow, which is very convenient for installation. The price of such products is very democratic, so the owners of their own homes prefer to put them.
Steel pipes, welded together, constitute the core of this heater. However, it also serves as the body. Making such a radiator is not as easy as the previous one, but it undoubtedly has much more variations of models. The most common classic option is a radiator similar to cast iron, but having much more channels for the movement of coolant.
The number of channels that a pipe radiator can have.
Such an instrument is quite expensive, and it can not be called a budget option. It is rather an option for the designer, not constrained in means.
All possible colors for pipe radiators.
His imagination, coupled with bright colors, original forms and the whole range of sizes, makes such radiators a real "highlight" of a stylish and beautiful interior.
And also about the price: any bimetallic radiator of a well-known European brand is cheaper than a tubular one, even made in Russia.
With heat release, the situation is not bad at all - heat transfer rate varies from 1200 to 1800 watts and even more. This parameter depends on the size of the radiator, its brand and the type of specific model. Note that the big advantage of these devices is low inertia. They heat up very quickly and begin to give off heat to the room.
The very process of heat release from them occurs in two ways - this is direct radiation of heat and heat transfer by convection.
The maximum working pressure of this type of radiator ranges from 6 to 10 atmospheres for plate radiators. This parameter is limited due to steel properties such as ductility.However, tubular radiators can withstand more pressure - from 8 to 15 atmospheres. All this means that steel radiators cannot be used in centralized heating systems. They will not be able to withstand the pressure of the central heating network.
An important detail is how gentle the radiator will be relative to the quality of the coolant. For steel, this is a real stumbling block - because it rusts so easily when air comes into contact with water. However, manufacturers do not give up - they are trying to overcome this problem. Special internal coatings are applied for protection. But, unfortunately, this struggle often ends in a victory for corrosion. Therefore, radiators from steel are better not to be installed in an apartment in a high-rise building. In the summer, the water will be drained, and the rust will start to eat radiators.
The maximum hot water temperature that steel batteries can withstand is from 110 to 120 degrees.
Steel radiators can have both side and bottom connections. Center distance is important for radiators with lateral connection. It determines how far the upper collector is from the lower one. This must be considered when installing the radiator. Depending on the model, type and manufacturer, steel panel radiators can have a center distance equal to the height of the radiator minus 50 - 70 cm. For tubular steel radiators, the center distance ranges from 120 mm to 2930 mm.
Now a few words can be said about external parameters, in particular, about dimensions. The length of the panel-type radiators can reach 3 meters, their height - from 20 to 90 centimeters. A tubular radiator can be made of almost any length, and its depth is limited to 22.5 centimeters. Height varies from 19 to 300 centimeters.
Few people pay attention to this indicator, however, manufacturers for the manufacture of steel radiators use steel of various thicknesses. This indicator can vary from 1.15 to 1.25 mm. It is clear that the thicker the steel the better.
Thanks to the workmanship material - durable and reliable steel - these radiators are able to live a long life without failing their masters. High-quality products with thick walls (0.12-0.15 centimeter), manufactured by reliable brands and responsible for their products, are especially good.
The installation of these heaters is not very complicated. And it is very convenient that it is possible to choose a panel-type radiator with a connection both on the side and on the bottom. In the latter case, the pipes can be hidden under the floor, and the temperature sensor is connected directly to the radiator. And the panels of the radiator itself can be connected in series or in parallel - both types of models can be found on sale.
Panel-type radiator with bottom connection system.
In Russia, such radiators are practically not produced - products of foreign production have a very favorable price for the buyer.It can be noted the manufacturers from Germany - Buderus and Kermi, from the Czech Republic - Korado, from Finland - PURMO, from Italy - DeLonghi. Each company has a completely arsenal of radiators that differ in height, length, depth, and accordingly power. Therefore, these data need to look directly in the passport of a particular model of the radiator. There is a huge number of models and it is very problematic to present all their technical characteristics within the framework of this material. Therefore, for comparison, we take the type 22 radiator (has 2 panels and 2 convector fins), 500/500 mm in size from some manufacturers.
Comparative characteristics of type 22 radiators, 500 mm wide, 500 mm long, popular manufacturers:
|Manufacturers||Operating pressure, ATM||Max. heat carrier t, 0 C||Power, at 70 0 C, W||Water volume||Weight||Connection method|
| Kermi |
|10||110||965||2.7||17.07|| Lateral - 4 x 1/2 ”thread (internal) |
Lower - 2 x 3/4” thread ( outdoor)
| Buderus |
|10||120||913||3. 15||14. 1|| Side |
Bottom, with integrated thermostat-valve
| Lidey |
|8.6||110||1080||3.3||15.1|| Lateral - 4 connecting pipes with a female thread 1/2 " |
Lower - 2 connects 1/2 "
| KORADO Radik |
|10||110||internal threads 914||2||15.6|| Sideways - 4 x 1/2 "thread (internal) |
Lower - 2 x 3/4 thread ”(Outdoor)
| PURMO |
|10||110||929||2. 6||13. 6|| Side - internal thread 1/2 " |
Lower - internal thread 2 x 1/2"
| DeLonghi RADEL |
|8. 7||110||1079||3. 1||14. 9|| Side - 4x1 / 2 " |
Lower - 2 x 1/2 "
* All data are taken from official sources of manufacturers
Fewer companies produce these more expensive products. Perhaps most of them in Germany - this is Zehnder Charleston, Arbonia, Kermi, Charleston. In Italy, these batteries are made by Israp Tesi. In the city of Kimry of the Tver region there is a plant of KZTO, producing radiators with a working pressure up to 15 atmospheres. They may even be suitable for an apartment in a multi-storey building, withstanding the pressure instability in central heating.