The regulator is a significant component of every diving equipment. It makes it possible for one to autonomously breathe in the air which is under pressure in a compressed air cylinder when subject to the respective conditions prevailing on land or under water. To do so, the air in the cylinder is reduced to the prevailing ambient pressure by the regulator.
It is composed of a 1st stage and a 2nd stage. The 1st stage is directly mounted on the bottle neck and first reduces the cylinder pressure from around 200 bar to a medium pressure of 4 to 12 bar above the ambient pressure. Subsequently the 2nd stage (the piece which you have in your mouth while diving) decreases this medium pressure further to the ambient pressure.
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