From time to time someone sends in a question to my compressed air information website, asking about sizing the air flow, or what size of air tube, or what air pressure should they use, to supply compressed air to a breathing mask. Typically, this involves folks trying to breathe while they spray paint something.
No compressed air that is coming from an industrial or DIY type air compressor is suitable for breathing.
Having said that, you can add sufficient air-treatment equipment to an air circuit from an industrial air compressor that will prepare the air for human consumption.
If you wish to do that, check with your local regulatory or specifying body to research and to find the type of compressed air treatment equipment you must add to the air supply, to make normal compressed air suitable for breathing.
Otherwise, if you are contemplating breathing air from a mask that is being supplied by non-treated compressed air, you are risking your health, if not your life.
