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Old 01-26-07, 12:16 PM
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cyccommute 
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Originally Posted by slvoid
Oh btw, always use the CO2 cartridge upright, otherwise you have extremely cold liquid CO2 going into your tube...
First, the CO2 will flash to gas as soon as it passes the venturi of the valve head. You can't have liquid CO2 at ambient pressures and temperatures. You are also going to have extremely cold CO2 flowing into the tube no matter how you hold the cartridge. Since the gas in the canister is under pressure and you are releasing that pressure at a pretty high rate, the gas will under go a Joule-Thomson expansion and is going to get very cold anyway. It's probably not a good idea to have bare skin in contact with the cartridge because it going to get very cold.
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