Originally Posted by Brauerei
I am openning a shop and want to hav a fill station. The LHBS has a pump system that is very pricey. I've seen posts of people filling it partially by pressure, then dumping some CO2 to freeze the tank then finishing the fill. Anyone have experience on doing this. Does it work? How much CO2 will I loose? And how much of a 50 lb cylinder will I get out?
I know of some off-road shops that have a large donor tank and freeze the "donee" tank, connect with adapter to flow liquid from donor tank until equalized. Repeat cycle.
Haven't heard of loss complaints, but you max out at 70%-80% of what you get when filled via gas company compressor method.