When is it appropriate to use an air compressor in a keg system?

Using an air compressor in a keg system is particularly relevant for Ball in Bag or Keykeg systems during the process of dispensing. These systems utilize a flexible bag inside a keg to contain the beer, which is pressurized to push the product out. Introducing air into these specific systems can help facilitate dispensing when utilized correctly. This compressed air provides the necessary pressure without directly interacting with the beer itself, allowing for effective service while maintaining product integrity.

The other scenarios reflect circumstances where an air compressor is generally not appropriate. For example, using it during fermentation can introduce unwanted oxygen, affecting yeast health and potentially leading to off-flavors. Similarly, while it may seem logical to use an air compressor to clear a blockage, this could create too much pressure or cause damage to the system. Lastly, when cleaning the system, other methods such as using water, sanitizing solutions, or specialized cleaning systems provide a more controlled and effective cleaning process without risking the integrity of the keg system components.