DEZEGA EmSCAPE Manuale d'uso - Pagina 10
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The hood 1 is made of reflective material and consists of a visor 3,
a half-mask 2, headband straps 4. With headband straps 4 that
require no adjustment, half-mask 2 fits tightly a human face. The
obturator at the bottom of the hood prevents the suction of toxic
substances under the hood.
Gas mixture in the breathing system of the escape hood circulates
within the pendulum scheme of flow.
During exhale breathing mixture goes through the half-mask 2, then
through the breathing tube 5 it gets into the regenerative cartridge 8.
The regenerative cartridge absorbs carbon dioxide and moisture from
the gas mixture and releases the volume of oxygen proportional to the
volume of absorbed substances. Breathing mixture from regenerative
cartridge 8 goes to the breathing bag 12.
When the user inhales, oxygen-enriched gas mixture from the breathing
bag 9 re-enters the cartridge 8 where it is further purified from carbon
dioxide and returns to the half-mask 2 to the respiratory organs through
the breathing tube 5.
Surplus breathing mixture during exhale leaves the breathing bag 9
through the relief valve 10.
To fill the breathing bag 12 and provide oxygen in the first minutes
after donning the escape hood, activate the starter by pressing the
quick release buckle for starter launch 9.
After putting on the hood, tighten the adjusting straps 6.
When the oxygen-containing product in the cartridge absorbs carbon
dioxide and moisture, heat is released. The surface of the cartridge
and the breathing mixture therefore heat as well. This indicates,
that the escape hood is operating correctly, and it should not cause
any anxiety. To prevent discomfort after donning that is caused by
excess heat formation, the heat shield 13 is used.
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