I don't think it's a good idea to try to use the cylinder valve for regulation - you could get a freeze at the outlet. There are airline regulators made that might work but I've never heard of one that was designed for CO2 cold. Again, a freezup. That stuff is C-O-L-D....brrrrr.informationjunky said:Or, you could use your cylinder valve to regulate flow, ie crack it for slower flow if your just wanting to do air bags or bike tires. Another alternate would be a ball valve with pressure gauge down line.