This air contains about 20 9 oxygen.
Pure oxygen scuba tanks.
To understand why you need to go into some detail your lungs are basically a long series of tubes that branch out from your nose and mouth from trachea to bronchi to bronchioles and end in little thin walled air sacs called alveoli.
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So the short answer is pure oxygen is generally bad and sometimes toxic.
The dgx premium o2 valves are not any more so in those characteristics than any other scuba tank valves we sell.
Scuba air tank 1l mini oxygen cylinder underwater respirator scuba dive cylinder scuba diving equipment with 15 20 minutes capability underwater breathing device scuba accessories 1.
Several risks are associated with the use of pure oxygen in diving.
Recreational scuba tanks are filled with compressed purified air.
Diving with pure oxygen can kill a diver even at shallow depths.
Just to be clear all the scuba tank valves sold by dive gear express incorporate oxygen compatible materials including fluorocarbon o rings and are oxygen cleaned by the factory.
For deco mixes above 40 percent there is simply no choice.
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Because the final mix in the cascade cylinders has an oxygen content of 40 percent or below a diver s scuba cylinder is not required to be oxygen serviced.
These shops mix into oxygen serviced cascade cylinders.
However i m not anywhere near an expert on the mechanism of oxygen toxicity but i believe it has to do with resulting in a lot more reactive oxygen species which can cause oxidative stress and lipid peroxidation.
As a certified scuba diver i learned that breathing pressurized pure oxygen leads to oxygen toxicity which can be fatal.
Generic cylinder and valve maintenance guides rarely address the specific nature of the scuba industry especially in regards to nitrox applications.