According to fill principle filling machine is divided into normal pressure filling machine, pressure filler and vacuum filling machines.
① Atmospheric pressure filling machine: it is filled with liquid weight under the atmosphere. This type of filling machine is divided into fixed-time filling and filling two types, only suitable for filling low viscosity gas-free liquids such as milk, wine and so on.
② Pressure Filling Machine: it is under pressure above the atmosphere filling, can be divided into two kinds: one is that the pressure in the tank is equal to the pressure in the bottle, and the liquid is poured into the bottle, which is called equal pressure filling; the other is that the pressure in the tank is higher than the pressure in the bottle, and the liquid is poured into the bottle by the pressure difference. The pressure filling machine is suitable for liquid filling with gas, such as beer, soda, champagne, etc.
③ Vacuum Filling Machine: The pressure in the bottle is lower than the atmospheric pressure to fill. This kind of filling machine has the advantages of simple structure, high efficiency and wide adaptability to the viscosity of the material, such as oil, syrup, fruit wine and so on.