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A gas cylinder quad, also known as a gas cylinder bundle, is a group of high pressure cylinders mounted on a transport and storage frame. There are commonly 16 cylinders, each of about 50 litres capacity mounted upright in four rows of four, on a square base with a square plan frame with lifting points on top and may have fork-lift slots in the ...
This concept was produced and marketed as the DM20 oxygen rebreather system and the DM40 nitrox rebreather system, in which air from one cylinder and oxygen from a second cylinder were mixed during injection through a nozzle which circulated the breathing gas through the scrubber and the rest of the loop. The DM40 was rated for depths up to 40m ...
[5] [6] When cylinders are filled with gas quickly, typically in 10 to 60 minutes at a dive filling station, the gas inside gets hot, which increases the pressure of the gas relative to its mass. When the cylinder cools, the gas pressure falls resulting in a reduced volume of breathable gas available to the diver.
Liquid oxygen has a clear cyan color and is strongly paramagnetic: it can be suspended between the poles of a powerful horseshoe magnet. [2] Liquid oxygen has a density of 1.141 kg/L (1.141 g/ml), slightly denser than liquid water, and is cryogenic with a freezing point of 54.36 K (−218.79 °C; −361.82 °F) and a boiling point of 90.19 K (−182.96 °C; −297.33 °F) at 1 bar (14.5 psi).
Trimix scuba cylinder label IMCA Trimix cylinder shoulder colour code Alternative IMCA Trimix cylinder shoulder colour code. Trimix is a breathing gas consisting of oxygen, helium, and nitrogen. It is used in deep commercial diving, during the deep phase of dives carried out using technical diving techniques, [1] [2] and in advanced ...
The second is suffocation due to LPG displacing air, causing a decrease in oxygen concentration. A full LPG gas cylinder contains 86% liquid; the ullage volume will contain vapour at a pressure that varies with temperature. [18]