No. Carbonated beverages are usually filled by the isobaric filling method, not by negative-pressure filling.
In an isobaric filling machine, a certain filling pressure is maintained in the liquid storage tank. After the container enters the machine, it is first pressurized with gas. The gas can be compressed air or carbon dioxide, with carbon dioxide being the more common choice. When the pressure inside the container becomes equal to the pressure in the storage tank, the liquid flows into the container by its own weight through the opened filling valve. During filling, the gas inside the container must be smoothly discharged back to the storage tank or gas chamber to maintain pressure balance.
For carbonated beverages such as soda, small sparkling wine, and beer, isobaric filling is mostly used. This prevents excessive release of carbon dioxide under negative-pressure conditions, which could affect filling stability and product quality.
For non-standard structural parts in isobaric filling machines, such as filling valves, gas charging connectors, and storage tank connecting components, Hansheng Automation provides custom machining based on customer drawings to meet the filling requirements of different carbonated beverages.
