HP / LP Air Cylinder users

Hi,

I just found this post- more regarding the adaptation of my 80 cu ft scuba tank for use with an old H-1 Pasche airbrus. Could anyone tell me what regulators, etc. I need?

THanks!!

TK 

I don't think you need a water trap with a scuba tank.
They have dry air designed for humans to breath underwater.

I got the Scuba setup done. It's basically a SCUBA primary with one high pressure and one low pressure fitting. The high pressure has a gauge that tells me how much air is left in the cylinder. The low pressure ~120psi goes to my regulator that as you know drops the pressure for the airbrush. I don't have a water trap yet, but once I get one, I'll make a bracket to hold it in place and will probably integrate an airbrush holder.

~one last thing. The latest date visible in the picture is 98. The cylinder was manufatured in 78 (that's older than me!) but its hydrostatic test is current.

http://i5.photobucket.com/albums/y167/kylecarter/P1010309.jpg

I would like to just point something out to those people that are now having thoughts running through their heads.

You can not take your old Bar-BQ propane tank down and have it filled with oxygen, no matter how big or old it is. The federal law prohibits such refills because they are not safe.

Sorry to burst your bubble like mine was. But better now than bursting your bubble in your modeling area!

That's what I've decided to do, use the cylinder at full pressure. My dad believes one is still current, if not, hydrostatic is only $35... still way cheaper than a silent compressor. And I've already got the regulators to use

You'll get more than that.  An airbrush doesn't use 1 cfm except at pretty high pressure.  I did an experiment last year and I think they are more like 0.25 cfm at about 15 psi.

If the tank is still certified you could always take it to a scuba shop and have it pressurized to full pressure.  Guys who use CO2 or Nitrogen tanks typically have to have them refilled only a couple of times a year.

good call, that's my error. Thanks!
It holds 80cu ft at 3000psi, so at 100psi it will hold 2.66cu ft which only will last 18 minutes :(

MusicCity wrote:

Pretty hefty scuba tank!

Or a very small sub!

It isn't an 80 cubic foot tank.  It might hold the equivalent of 80 cubic feet of air at some specific pressure, but a tank with 80 cubic feet of static volume would be 10' long by 3.2' in diameter.  Pretty hefty scuba tank!