5. CARBON DIOXIDE CONTROL. After the gasses are supplied to the chamber,
the task is then to maintain the gas in a clean breathable state. This is
the function of the life support system. The life support of a saturation
system consists of removing the carbon dioxide, odors, and dust from the gas
and cooling to dehumidify, and heating the gas. As shown in Figure 6-16, gas
is drawn from the chamber through a double hull stop valve, then through a
blower to the carbon dioxide scrubber. After the scrubber, the gas is
dehumidified by cooling then reheated to the desired temperature. A Purifil
filter following the carbon dioxide scrubber is included to remove body
odors. A filter element on top of the Purifil filter made of Armalon will
remove all dust particles.
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