According to the filling principle, the filling machine is divided into a normal pressure filling machine, a pressure filling machine and a vacuum filling machine.
1 Atmospheric filling machine: It 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.
2 Pressure filling machine: It can be filled under atmospheric pressure. It can be divided into two types: one is that the pressure in the liquid storage tank is equal to the pressure in the bottle, and it flows into the bottle by the liquid weight and is filled. For equal pressure 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.
3 Vacuum Filling Machine: Filling in the bottle at a pressure lower than atmospheric pressure. The filling machine has the advantages of simple structure, high efficiency, wide adaptability to the viscosity of materials, such as oil, syrup and fruit wine.