I've been filling CO2 cylinders for the local paintballers on an ocassional basis, and am looking for a way to rather quickly cool an 8 to 32 oz metal cylinder down quickly. Would any of these cold air guns have enough oomph to significantly cool something that weighs from 1 to two pounds, in lets say a minute?
Although I can dunk the tank under a stream of cold water, its not quite cool enough, and this makes it very difficult to get the rated charge into the cylinder. So I currently waste 3 or 4 oz of CO2 because by gasing the cylinder off quickly, I can get enough temp drop to then fill it properly.
Out of a 50lb CO2 tank, I think I can actually account for about 25 lbs worth of refills before the tank is too low to siphon. I'd like to boost the saleable gas ratio.