The automatic filling machine is used in the processing and production of fluid, paste, viscous and other products. Different filling equipment has different filling methods, including three filling methods including normal pressure, negative pressure, and pressure, which are suitable for different product requirements. The following is an introduction to the characteristics of the above three filling methods.

        1. Normal pressure filling method; this type of equipment usually raises the storage tank to increase the pressure. Filling with its own body weight as the power, suitable for the processing of milk, wine and other products with good fluidity and low viscosity.

　　2. Negative pressure filling method; this type of equipment is also called a vacuum filling machine. It must be ensured that the pressure in the bottle is lower than the atmospheric pressure, and then the product is filled and filled according to the principle of air pressure balance. This type of equipment is generally simple in structure, but has strong air-tightness between the components, and does not have a large requirement on the viscosity of the material. It can complete the processing of syrup, oil, sauce and other products.

　　3. Pressure filling method; this type of equipment is filled under conditions of higher than atmospheric pressure. One is to use the pressure in the storage tank to be equal to the pressure in the bottle, and the liquid material flows into the bottle by its own weight, also known as Isobaric filling. The other is to add a booster piston at the top of the storage tank to help complete the process. Common filling products are beer, champagne, beverages with gas, etc.