The atmospheric filling machine is filled by liquid gravity under atmospheric pressure. This type of filling machine is also divided into two types: regular filling and constant volume filling. It is only suitable for filling low viscosity liquids, such as milk and wine.
The pressure filling machine can be filled in higher than the atmospheric pressure, and can also be divided into two kinds: one is the pressure in the tank is equal to the pressure in the bottle, and is filled in the bottle by the liquid self weight. It is called equal pressure filling. The other is the pressure in the tank is higher than the pressure in the bottle. The liquid body flows into the bottle and the high speed production line is inflow by pressure difference. Use this method more. Pressure filling machine is suitable for liquid filling with gas, such as beer, soda water, champagne and so on.
Vacuum filling machine is bottled under pressure below atmospheric pressure to fill.