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2. Scott Air-Pak SCBA - Wikipedia

   en.wikipedia.org/wiki/Scott_Air-Pak_SCBA

   Other sizes sold are 45, 60 & 75 minute cylinders. The cylinder and valve assembly is used for storing breathable air under pressure. Dimensions: a. Cylinder = 19.6” × 5” b. Water capacity = 285 cubic inches c. Air capacity = 45 cubic feet (1,280 L) for a 30-minute air supply [2] (1274 liters) d. Weight = 11 pounds (5.0 kg) e.

3. Self-contained breathing apparatus - Wikipedia

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

   The endurance of the cylinder can be calculated from the volume, pressure and breathing rate of the user. The formula: volume (in liters) × pressure (in bars) / 40 (litres per minute) - 10 minutes (the 10 minutes is a safety margin, or reserve), so a 6-liter cylinder, of 300 bar, is 6 × 300 / 40 - 10 = 35 minutes working duration.

4. High altitude breathing apparatus - Wikipedia

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

   By the 21st century one of the popular oxygen systems on Mount Everest used carbon-fiber reinforced aluminum bottles, with a 3-liter cylinder of oxygen weighing 7 pounds (3.2 kg) (3.2 kg) when filled up at 3,000 pounds per square inch (210 bar).

5. Oxygen storage - Wikipedia

   en.wikipedia.org/wiki/Oxygen_storage

   Most humans can function at rest with an oxygen level of 15% at one atmosphere pressure; [1] a fuel such as methane is combustable down to 12% oxygen in nitrogen. A small room of 10 meter 3 has 2.08 meter 3 (2080 liters) or 2.99 kg of oxygen which would occupy 2.62 liters if it was liquid. [2]

6. Oxygen tank - Wikipedia

   en.wikipedia.org/wiki/Oxygen_tank

   Medical use liquid oxygen airgas tanks are typically 2.4 MPa (350 psi). [citation needed] All equipment coming into contact with high pressure oxygen must be "oxygen clean" and "oxygen compatible", to reduce the risk of fire. [3] [4] "Oxygen clean" means the removal of any substance that could act as a source of ignition. "Oxygen compatible ...

7. Lung volumes - Wikipedia

   en.wikipedia.org/wiki/Lung_volumes

   TLC: Total lung capacity: the volume in the lungs at maximal inflation, the sum of VC and RV. TV: Tidal volume: that volume of air moved into or out of the lungs in 1 breath (TV indicates a subdivision of the lung; when tidal volume is precisely measured, as in gas exchange calculation, the symbol TV or V T is used.)