The liquid filling machine can be divided into a normal pressure filling machine, a pressure filling machine and a vacuum filling machine according to the filling principle.
The atmospheric pressure filling machine is filled by liquid weight under atmospheric pressure. This type of filling machine is divided into two types: timed filling and constant filling. It is only suitable for filling low viscosity gas-free liquids such as milk and wine.
The pressure filling machine is filled at a pressure higher than atmospheric pressure, and can also be divided into two types: one is that the pressure in the liquid storage tank is equal to the pressure in the bottle, and is filled by the liquid weight into the bottle, which is called filling. Isobaric filling; the other is that the pressure in the liquid storage tank is higher than the pressure in the bottle, and the liquid flows into the bottle by the pressure difference, and the high-speed production line mostly adopts this method. The pressure filling machine is suitable for liquid filling with gas, such as beer, soda, champagne and so on.