FAUCON extinguishig ampoule - FUNCTION

FAUCON EXTINGUISHING AMPOULE'S METHOD OF AUTOMATIC ACTIVATION

When fire breaks out in a small enclosed area and temperatures rise, extinguishing liquid simultaneously begins to heat and as result of that starts to extend in the glass ampoule. When the temperature of the liquid extinguisher is approximately 85°C ± 5°C the glass breaks into pieces which allows the liquid to drop into the area where endothermic process begins-taking energy from the fire, or momentarily cooling down the area. As a side product of this endothermic reaction, small quantities of nitrogen and carbon dioxide are released. Their function is to prevent the entrance of oxygen to the burning area. Substances that do not decay form a protective layer over the surface of the extinguishing liquid, which protects the area from catching fire again.

The phase of heating causes the chemicals to decompose. High expansion pressure breaks the ampoules containing chemicals into small pieces, as a result of that these chemicals are sprayed / sprinkled across the area. The rising of pressure and the zone of spraying are evident from the following diagrams.
The division of the content is demonstrated and evaluated in the following diagram. The evaluation is reached on the basis of the calculated averages gained from the results of tests carried out under different circumstances.
Averages gained from tests under different circumstances are taken into consideration.



Extinguishing effect of the chemicals:

FAUCON extinguishing liquid is composed of substances that are activated when fire breaks out. They cause a strong cooling effect by which they oust oxygen from the area of the burning substance, consequently immediately putting out the fire (urea, chloride of ammonia, calcite soda, sodium silicate, sulphate of ammonia, alunite). When fire breaks out, the released heat causes the following chemical reactions to begin:

Carbon dioxide and ammonia (cooling effect; ousting of air) are formed with decomposition of urea in the presence of water:
CO(NH)2 + H20 ≥ CO2 + 2NH3
NH3 + 02 ≥ NOx + H20

Ammonia (cooling effect) and chlorine hydrogen acid originate with the warming of ammonia chloride:
NH4CI ≥ NH3 + HCI
NH3 + 02 ≥ NOx + H20

Calcite soda reacts with chlorine hydrogen acid and forms common salt, water and carbon dioxide (ousting of air):
Na2CO3 + 2HCI ≥ 2NaCI + H20 + CO2

Calcite soda also reacts with sulphur acid into sodium sulphate and carbon acid. Carbon acid decomposes to water and carbon dioxide (cooling effect). Together with sodium sulphate and water it ousts the air away from the surroundings of the burning areas:
Na2CO3 + H2SO4 ≥ Na2S04 + H2CO3
H2CO3 ≥ CO2 + H20

From what is written above, it is evident that large quantities of gases and solid substances are released from the solution simultaneously with the reactions provoked by the extinguishing (ammonia, carbon dioxide).  Due to the cooling effect of the evaporated water and the released gases that oust the air away from the burning area, the fire is immediately put out. As sodium sulphate reacts with alunite it forms waterless aluminium sulphate which has excellent spraying qualities. Aluminium sulphate, which originates from the reaction, forms an exceptionally thin cover across the burning surface which protects the surface from catching fire again. 

 
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