The pounds per square inch gauge (PSIG) required for an ale or lager is based on the carbonation level of the beer in volumes, the temperature of the beer and the elevation you reside. The beer temp. is normally what you desire it to be. Nine times out of ten it probably will be around 38F.
With this, knowing your beer temperature and your elevation (maps / airport info), you would heed the suggestion of calling the brewery for not psi or temp. info but for the volumes of gas they brew in their beer. This will tell you what your your PSIG should be.
Example: If it is a 2.6 v/v beer, perfect equilibrium to maintain the gas in the beer as well as not allowing the beer to absorb excess gas would be 12 PSI in the head space of the keg. Unfortunately, this will not keep the gas in the beer while you are dispensing due to pressure drops when the faucet is opened. Therefore, the industry, for decades, has applied what is referred to as "push pressure" by some to the tune of up to two additional PSIG to the keg to accommodate the pressure drop.
Refer to this
Zahm-Nagel carbonation chart after you determine v/v of beer and add two pounds to the what the chart tells you. For this to be successful, you must know exactly what the temperature of the beer is and maintain this to the faucet. This is why the tower must be cooled. Conduct a search under tower cooling and you will find tons of posts.
By the way, the reason the v/v of beer from various breweries is not public knowledge is because it is considered part of the recipe and therefore proprietary information. Normally they will disclose it to those who explain that this info is required to balance the system.
Toll Free Orders:
1 (866) 291-5756
Cooling Tower
Linear Mode
