The isobaric method, also known as the pressure gravity filling method, involves inflating the packaging container at high atmospheric pressure to make the pressure equal to the pressure inside the storage tank, and then relying on the weight of the filling liquid flowing into the packaging container. This method is commonly used for filling carbonated beverages, such as beer. This method can reduce the loss of CO2 contained in such products, and prevent excessive bubbles during the filling process from affecting product quality and quantitative accuracy.
3. Vacuum method
The vacuum method is used for filling under conditions below atmospheric pressure, which can be done in two ways:
① Differential pressure vacuum
The liquid storage tank is under normal pressure, and only the packaging container is evacuated to form a vacuum, relying on the pressure difference between the liquid storage tank and the container to be filled to complete the filling. This method is quite commonly used in China.
② Gravity vacuum
The liquid storage tank is inside a vacuum packaging container. First, a vacuum is drawn to form a vacuum degree equal to that of the liquid storage tank, and then the liquid material flows into the packaging container by its own weight. Due to its complex structure, it is rarely used in China. Vacuum filling is widely used and suitable for filling liquid materials with slightly higher viscosity, such as oil, syrup, etc.
During the use of the beverage filling machine, it is necessary to constantly check and add oil mist, and the oil must be kept at one-third position. The discharge piston and the sealing ring cylinder at the lower end of the discharge need to be replaced in a timely manner after wear. When cleaning, try to avoid being scratched by sharp and hard objects. If there is contamination, it can be wiped with alcohol and the whole body must be kept clean.
