There was a company selling portable _liquid_ nitrogen tanks for the
purpose of providing onsite compressed gas. Supposed to have hours and
hours of air wrench capacity. I can't find the website right now, but a
little searching should hunt them out.
Jon
Randall Young wrote:
>
> > For instance, let's say I go to nationals and manage to break something
> > reasonably major at the Pro... Will a nitrogen bottle run air impacts &
> > ratchets & blow guns for say 3 hours of usage (obviously the 3 hours would
> > be spread out over a few days...)?
>
> Hmmm, typical impact uses maybe 4 cfm @ 7 atmospheres (90 psi gage), so 3
> hours would be 3*60*4*7 = 5040 scf. A little web surfing turns up that a
> common "type 49" nitrogen cylinder contains 304 scf. Even ignoring the
> "tare" gas left in the cylinder when it's pressure drops to 90psi, you're
> sure going to need a lot of them ...
>
> Randall
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