The maximum temperature in a tube furnace can vary depending on the product range and type of heating elements used in its construction. Carbolite Gero tube furnaces, for example, have maximum operating temperatures ranging from 1100°C to 2600°C.
Gas furnaces, on the other hand, offer another practical means of attaining high temperatures. The maximum temperature reached in an ordinary gas furnace using illuminating gas made from coal and air at 2 or 3 lb. pressure is about 1400°C. When burning natural gas, temperatures 100° or 200° higher may be attained. With higher air pressures and illuminating gas, temperatures as high as 1650°C can be obtained, and in the case of natural gas, as high as 1800°C. By recuperating waste heat, preheating gases, or adding oxygen, temperatures over 2000°C have been maintained in some cases.
Muffle furnaces also have different maximum temperature ranges depending on the type of heating elements used. Furnaces with metallic wire heating elements can reach temperatures ranging from 1000°C to 1200°C. Molybdenum disilicide heating elements, on the other hand, are able to reach temperatures as high as 1800°C.
In general, muffle furnaces have maximum temperatures ranging from below 1000°C to above 2000°C. It is recommended to choose a furnace with a temperature range that exceeds your application's required temperature to provide flexibility for future applications.
It is also important to consider machine safety features when choosing a furnace, such as automatic shut-off, over-temperature protection, forced cooling, and self-diagnostic functions.
In summary, the temperature range in a furnace can vary depending on the type of furnace and heating elements used. Tube furnaces can reach temperatures from 1100°C to 2600°C, gas furnaces can reach temperatures up to 1800°C or higher, and muffle furnaces can have maximum temperatures ranging from below 1000°C to above 2000°C.
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