What is a gas blender?
Depending on the style of beer and the nature of the draught beer system, different gas blends using nitrogen and/or carbon dioxide are required to preserve the level of beer carbonation as determined by the brewer. Beers are made to brewers’ specifications of precise amounts of dissolved carbon dioxide to meet a specific taste profile. It is the goal of any draught beer system to maintain that balance of dissolved carbon dioxide or carbonation from keg to faucet. Stouts and other nitrogenated beers have a low amount of dissolved carbon dioxide and, as such, use a 25% CO2 / 75% N2 blend to keep that balance. Other styles of beer, such as ales and lagers, have higher amounts of dissolved carbon dioxide and require a higher amount of carbon dioxide in gases used to preserve the beer in the kegs and push the beer to the faucet. In high-pressure, long-draw draught beer systems (more than 15 psi), these styles of beers typically will use a 70% CO2 / 30% N2 blend. In low-pressure, short-draw
