Draft Equipment Regulators
Beer obtains its flavour from the hops, malt, and carbonation. Carbonation is the process when carbon dioxide is dissolved within the liquid. It is a natural process that occurs during the fermentation process. When the yeast utilizes the sugar, it produces alcohol and carbon dioxide. Brewers use an airlock or blowoff tube to release the CO2 during fermentation, so there needs to be a way to carbonate the homebrew once fermentation is done. Many home brewers increase the carbon dioxide content of the beer by inserting the said gas under high PSI (pressure). This is the reason why most beers create a lot of fizz once the bottle is opened or dispensed from the keg, and you get a nice head on your beer.
If you have a draft beer system, the most two important components include the gas tank and the regulator so that you can dispense the beer. While the tank contains gases such as CO2 or Nitrogen, the regulator controls the flow of the beer from the keg. The regulator controls the pressure of the gas released from the tank. Without it, it will be too difficult to dispense the beer as the pressure is too strong. What will happen is that the flow is released as a strong jet of water. (more info below)