CO2 cylinders are available in different weights, i.e., 2 1⁄2, 5, 10, 15, 20 and 50 lbs. Generally used in direct draw systems for low-volume dispensing. The filled CO2 tank provides gas that is monitored by a regulator and controls the flow of beer. In any draft beer system, the CO2 gas cylinder and pressure regulator are crucial components that start the process of dispensing beer. Air compressors are rarely cleaned and the oil from the compressor quite often mixes with the air and the result will be an off smell and taste to the beer. The brewing industry invests millions of dollars in keeping air (oxygen) out of the keg package and, therefore, applying air pressure to the beer keg is detrimental to beer quality. It is equally important to note that compressed air is never recommended as a gas source.
The gas selected should only be viewed as the pressure source of the system and should never change the carbonation level of the beer as prescribed by the brewery.ĬO2 is the best gas source for dispensing draft beer as CO2 is naturally generated during fermentation. You need to move the beer from the keg to the faucet, this is called applied pressure. Gas goes into the keg and beer comes out simple, right? Take a few minutes and understand that the first component on the pressure side of a draft beer system – the gas source.
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