SKE pasteurizer cabinet is made of stainless steel 304 material, utilizes a built-in steam boiler to produce 135℃ steam for sterilization of bottled and canned beer, milk and other beverages. Cabinet interior sterilization temperature and time can be adjusted and temp is automatic controlled during pasteurization, has wide range of applications.
Effectively controlling the PU value is the key to the operation of the system. Too high sterilization temperature or too long sterilization time will produce serious oxidation odor. At the same time, many flavor substances will be damaged, and protein denaturation will also be caused, thus affecting the stability of beer colloid and foam. Insufficient sterilization temperature or too short sterilization time will lead to low PU value, and certain biological stability (i.e. shelf life) cannot be guaranteed.
The required heat treatment is achieved through a combination of temperature and holding time. This level of pasteurization is quantified as Pasteurization Units (PU) and calculated as follows:
t is the holding time in seconds
T is the pasteurization temp in °C
The refer PU value:
330mL Glass Bottles: 20PU/63*C/8minutes, 25PU/63*C/9minutes
330mL Cans: 15PU/61*C/11minutes
30L Stainless Steel kegs: 22PU/66*C/3minutes
30L PET Keykegs: 20PU/63*C/8minutes, 25PU/63*C/9minutes