Great demo. Just to add my input in case anyone is still looking for this information. A full standard scuba tank is generally 220bar (3200psi) or 300bar (4350psi). A standard scuba regulator is set to permit 10bar (145psi) to pass on a low pressure (LP) port so your tool will be charged with that pressure until the tank pressure falls below it, you should never completely empty a high-pressure vessel anyway as this will cause condensation and rust inside. Note that you will need to have access to a scuba store to refill the tank with "clean dry air", the tank and valve will also require regular service and testing for safety purposes, this is a legal requirement and the shop cannot fill an out of test cylinder. The amount of air used will depend upon the tool being used and the pressure. 10bar (145psi) is the standard setting for scuba regulator but this can be adjusted lower or higher, a lower pressure on the LP port will permit longer use but less power. The length of time the air will last depends upon the tool you are using, think of the air pressure as a battery. If you run a drill or a grinder you might get 15 to 20 minutes, for a nail gun you will probably get several hours of constant use.
You can find scuba tank adapters to connect industrial gas regulators (best place to score those is Ebay) of appropriate inlet pressure ranges to match or exceed your scuba tank pressure. Off-roaders do this fairly often and having power to run pneumatic tools may come handy on your boat. Do your industrial gas fitting homework (learn CGA and other fitting styles) and play safe. Western are the dominant US compressed gas fitting and hose supplier. DO NOT USE HARDWARE STORE FITTINGS OR LOW PRESSURE HOSE ON HIGH PRESSURE CONNECTIONS.
Thank you for the info. I have a few cylinders that may not pass hydro and I intend to fill them to only about 80-150 psi with a normal air compressor. Do you have any links to adapters that I can use to fill the tanks using a normal 150 psi compressor?
Thanks for the reply, my setup doesn’t seem to have much ass behind it. Are you seeing more then 75-80ft/lbs ? I don’t think I’m getting enough cf/min from the reg.
