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april 2011

How tubular electric resistances are manufactured

Some technical aspects of the construction of tubular electric resistances sold by GNALI BOCIA

The particular attention that GNALI BOCIA factories place in building tubular electric resistances is one of the key factors that guarantees long service life. 
The other important aspect is the right choice of materials constituting the tubular electric resistance which must resist against time and stresses due to intermittent operation. 
The starting component is the copper tube with a purity greater than 99% which is annealed in order to have a good heat deformability. The electric heating element which is the heart of tubular electric resistance and which defines the thermal power is placed inside. Remember that the items in the catalogue have power ratings ranging from 1000 to 3000 watts. 
The next step is to isolate the heater from the copper tube and this is carried out by the compacted magnesium oxide which fills all the spaces. The whole is then closed by sealing and fixing the heater tube to the flange. 
Sealing is important for a good lifespan of tubular electric resistances because it preserves the state of the insulating powder and prevents infiltration and moisture absorption, which lead to an increase in its electrical conductivity by creating a bridge between internal and external parts, thus dispersing electric current and inevitably triggering the safety switches of the household installation. 
For any information please contact us.


See also
16/11/2018 Thermostats for tubular electric resistances Check the function of the tubular electric resistances through the bimetallic control thermostats

16/01/2016 Electric tubular heaters capable of offering better resistance to corrosion. Copper at a high purity grade in order to build electric tubular heaters suited to house kettles

16/03/2017 The importance of the specific power of electric resistances Electric resistances made of pure copper to reduce the effects of corrosion and increase duration over time.

16/12/2019 The range of tubular heating elements According to practical needs, Gnali Bocia has equipped its catalog with a decisive choice of tubular electric resistances Gnali Bocia offers a number of types of tubular electric resistances

16/11/2017 Pure copper electric resistances Top quality Italian pure copper and brass are used to produce our electric resistances.

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