4. FUNCTIONAL DESCRIPTION
Rebreather is a simply device that capture and recirculate the exhaled breath, scrub out the
carbon dioxide produced by the respiratory functions and add oxygen to replenish what
comsumed.
Castoro C96PRO is a cyclic type fully closed circuit oxygen rebreather.
Instead of a one-way gas circulation, to and from breathing bag as pendular type, the gas
circulates in two separate directions.
During the respiratory cycle the gas circuit is as in figure 4.
High pressure gas (see figure 5) passes from the oxygen cylinder through the bypass valve into the
breathing bag, expanding same and assuming the environmental pressure.
The diver inhales the oxygen from the breathing bag through the inhalation hose and
mouthpiece and exhales the respiration gases through the exalation hose into soda lime canister
(the non-return valve contained in each hose, controls in proper manner the flow direction).
The soda lime absorbs and fixes the carbon dioxide contained in the respiration gases and
purifies fully the non metabolized oxygen.
Therefore the oxygen passes in the breathing bag and the cycle starts again.
CASTORO C96PRO - Figure 4, Breathing Loop
BREATHING BAG
OXYGEN CYLINDER
INHALATION
HOSE
EXALATION
HOSE
MOUTHPIECE
SODA LIME
CANISTER
