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  2. High altitude breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/High_altitude_breathing...

    High altitude breathing apparatus is a breathing apparatus which allows a person to breathe more effectively at an altitude where the partial pressure of oxygen in the ambient atmospheric air is insufficient for the task or to sustain consciousness or human life over the long or short term.

  3. Oxygen tank - Wikipedia

    en.wikipedia.org/wiki/Oxygen_tank

    breathing at altitude in aviation, either in a decompression emergency, or constantly (as in unpressurized aircraft), usually in high pressure cylinders; oxygen first aid sets, in small portable high pressure cylinders [1] gas blending, for mixing breathing gases such as nitrox, trimix and heliox

  4. IDA71 - Wikipedia

    en.wikipedia.org/wiki/IDA71

    Or it can be run with one of its two absorbent canisters filled with potassium superoxide, which gives off oxygen as it absorbs carbon dioxide: 4KO 2 + 2CO 2 = 2K 2 CO 3 + 3O 2; in this mode the oxygen cylinder is a bailout, or to fill and flush the circuit at the start of the dive. [1]

  5. Rebreather - Wikipedia

    en.wikipedia.org/wiki/Rebreather

    A store of oxygen, usually as compressed gas in a high pressure cylinder, but sometimes as liquid oxygen, that feeds gaseous oxygen into the ambient pressure breathing volume, either continuously, or when the user operates the oxygen addition valve, or via a demand valve in an oxygen rebreather, when the volume of gas in the breathing circuit ...

  6. Oxygen breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Oxygen_Breathing_Apparatus

    [1] The scrubber canister uses potassium superoxide as both a carbon dioxide absorbent and as an oxygen source. A sodium chlorate oxygen candle in the base of the unit generates oxygen on start-up as the canister has to reach a high internal temperature before it will start generating oxygen. The circulation of exhaled air containing carbon ...

  7. Self-contained breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Self-contained_breathing...

    An open circuit SCBA typically has three main components: a high-pressure gas storage cylinder, (e.g., 2,216 to 5,500 psi (15,280 to 37,920 kPa), about 150 to 374 atmospheres), a pressure regulator, and a respiratory interface, which may be a mouthpiece, half mask or full-face mask, assembled and mounted on a framed carrying harness. [2]

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  9. Breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Breathing_apparatus

    A pressure suit is a protective suit worn by high-altitude pilots who may fly at altitudes where the air pressure is too low for an unprotected person to survive, even breathing pure oxygen at positive pressure. Such suits may be either full-pressure (e.g., a space suit) or partial-pressure (as used by aircrew). Partial-pressure suits work by ...

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