Atmospheric filling
Atmospheric pressure filling is also known as pure gravity method, that is, under normal pressure, the liquid material flows into the product container by its own weight. Most can flow freely. Dynamic gas-free liquid materials can be filled by this method, such as liquor, fruit wine, milk, soy sauce, vinegar, etc.
Isobaric filling
The isobaric method is also known as the pressure gravity filling method, that is, under the condition of higher than atmospheric pressure, the packaging container is first aerated to form an air pressure equal to that in the liquid storage tank, and then rely on the self-weight of the liquid filled material to flow into the packaging container. This method is commonly used for the filling of carbonated beverages such as beer, soft drinks, sparkling wine, etc. Filling in this way can reduce the loss of CO2 contained in such products and prevent excessive foaming during the filling process that affects product quality and quantitative accuracy.
Vacuum filling
The vacuum method is filled under the condition of lower than atmospheric pressure, that is, the liquid storage tank is under normal pressure, only the packaging container is pumped to form a vacuum, the liquid material relies on the pressure difference between the storage tank and the container to be filled to produce flow and complete the filling, this method is more commonly used in liquor and other products.
