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Comparison Royal Thermo BiLiner Silver Satin BiLiner 500/87 12 Silver Satin vs Royal Thermo PianoForte Silver Satin PianoForte 500/100 12 Silver Satin

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Royal Thermo PianoForte Silver Satin (PianoForte 500/100 12 Silver Satin)
Royal Thermo BiLiner Silver Satin BiLiner 500/87 12 Silver SatinRoyal Thermo PianoForte Silver Satin PianoForte 500/100 12 Silver Satin
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Radiator typesectionalsectional
Country of originRussiaRussia
Manufacturer's warranty25 years25 years
Technical specs
Materialbimetallicbimetallic
Number of sections1212
Operating pressure30 bar
Max. pressure45 bar
Burst pressure200 bar
Heat transfer medium volume2.52 L2.52 L
Heat tranfer medium max. temperature110 °C110 °C
Mountingwallwall
Connectionsideside
Pipe centre distance500 mm500 mm
Connection size1/2"1/2"
Heat output2052 W2340 W
Radiator height574 mm591 mm
Radiator width960 mm960 mm
Radiator depth87 mm100 mm
Weight22.2 kg25.2 kg
Coloursilversilver
Added to E-Catalogfebruary 2017october 2016

Operating pressure

Radiator operating pressure.

This term usually means the highest pressure of the heating medium that the radiator can sustain without consequences for an indefinitely long time. Higher rates are also allowed for a short time (see "Maximum pressure"). However, the standard operating pressure in the heating system should not exceed the specs of the radiator; otherwise, the product is likely to be damaged. In general, it is believed that this indicator should be at least 2 bar higher than the actual working pressure in the system — this will give an additional margin of safety in case of emergencies.

Max. pressure

The highest heating medium pressure that the radiator is capable to sustain without consequences during short-term exposure.

This figure is always greater than the operating pressure (see above). It directly shows the resistance of the product to emergencies, primarily the water hammer. Other things being equal, higher maximum pressure means greater strength and reliability — however, such radiators are more expensive.

Burst pressure

The burst pressure of the radiator is the water pressure, upon reaching which the product will inevitably be damaged.

The main practical specs of the radiator are the working and maximum pressure (see above); it is on them that one should focus when choosing. The burst pressure is given in the description mainly for promotional purposes: other things being equal, a higher value means greater reliability and resistance to emergencies.

Heat output

The rated thermal output of the radiator is the amount of heat given off to the air in normal operation.

When choosing this parameter note that the heat output will depend on the temperature difference at the inlet and outlet to the radiator, as well as on the ambient temperature. The greater the temperature difference and the colder it is around, the more intense the heating will be. Therefore, in the specs, it is customary to indicate heat transfer for certain standard conditions. In particular, the designation according to the European standard EN-442 is very popular, which assumes heating medium temperatures of +75 °С and +65 °С at the inlet and outlet, respectively, as well as an air temperature of +20 °С. Real conditions and the actual heat output of the radiator may differ; therefore, when choosing, it is best to choose a model with a certain margin and compensate for excess power with one or another regulator. As for the actual values, in the most modest models, the heat outputdoes not exceed 750 W, or even 500 W, and in the largest, this figure can reach 3.5 – 4 kW or more.

The choice for this parameter depends primarily on the size and specs of the heated space. The simplest calculation formula is as follows: at least 100 W of thermal power is required per 1 m2 of area. This formula is relevant for standard r...esidential/office premises with ceilings of 2.5 – 3 m, without problems with thermal insulation; for more specific conditions, there are more detailed calculation methods, that can be found in special sources.

Radiator height

Radiator height. The most widespread nowadays are standard height sizes: 30 cm, 40 cm, 50 cm, 60 cm and 90 cm. In addition, you can find other options (although much less often) — 20 cm, 45 cm, 55 cm, 70 cm, 75 cm and 80 cm.

Firstly, the height of the product primarily determines the size of the space required for installation. At the same time, for models placed in a niche (see "Mounting"), this dimension actually corresponds to the required depth of this niche. In other cases, it is worth taking a certain margin in height — the radiator cannot be installed close to the floor and window sill (or other similar items). And models with a bottom connection (see above) will require additional space for the pipe connection.

Secondly, this size determines heat output: all other things being equal (including the size in width), a higher radiator will have a larger working surface area and a higher heat output (this is also true for heat exchangers in convectors). Thus, modern radiators are traditionally produced not in separate models, but in series of the same type of devices that differ onl...y in size and thermal power.

Radiator depth

The size of the radiator from the front to the back wall.

This parameter determines both the size of the space occupied by the device and its efficiency: other things being equal, a greater depth means a higher heat output (due to an increase in the area of contact with air). Specific nuances depend on the type of radiator and the method of its installation (see above). So, the most critical depth is for convectors with a horizontal layout, mounted in a niche — in them, this size directly determines both the required dimensions of the niche and the area of the working surface. In column models, this dependence is somewhat less pronounced. In panel devices, the efficiency depends not so much on the depth as such, but on the number of working elements (see "Type (panel)") — although a larger number of panels/convectors inevitably affects the dimensions. And sectional radiators most often have a relatively small depth: the differences between them in this parameter are not fundamental.