air tank??

how you going to fill the tank, from a compressor? FYI, just remember, air from an oil lubricated compressor can (read will) give you cancer. If you can fill it from your tyre inflating compressor it would probably work. Make sure its sucking clean air, i.e. no CO or other toxins. I have a calculation somewhere for working out the consumption rate for a human. It's somewhere around 20L/min @ 14.7psig. If your tank holds 90 psi and 50 litres then the volume expanded back to atmospheric pressure is quite large. Why you want to do this anyway?

Hi, you want to be very carefull with this type of unit especially with the rules and regs now we all have to put up with even though you have a regulator valve. It is just that I have been with the Mining Industry for years and the govt health and safety take a dim view of this.
I know it also seems to be over regulated and I am staring to think its about time I retired as I have had enough and one is not allowed to use common sense any more.
Ian

90 psi is 90psi, you need to be more concerned regarding the actual volume, not the pressure.

I was looking at doing the same sort of thing with CO2 fire extinguishers, however with all the mucking about and the likes, you can get application specific pressure vessels with gauge and pressure releif valaves from places such as bunnings and tool shops for $50 on sale. Alot less mucking about, not that Im knocking your idea, just look at the practicalities.

On another note, everyone in the east must be away for the public hliday eh??