Filling method guide
Counter-pressure filler vs isobaric filler: what should you specify?
Buyers often see both terms used for carbonated filling. This page explains how the terms relate and what to check when comparing machinery quotes.
- Check whether the machine purges or pressurises containers before filling.
- Check how pressure is controlled during filling.
- Check how quickly the container is capped or seamed after fill.
| Question | Why it matters |
|---|---|
| Does the machine pre-pressurise the container? | Helps control foaming and retain CO₂ |
| Is CO₂ purging included? | Can reduce oxygen pickup and improve presentation |
| How is pressure balanced during filling? | Controls fill stability and consistency |
| How is closure handled? | Protects carbonation after filling |
| What product range is supported? | Avoids selecting a route based on the wrong application |
- Ask whether the route is suitable for your carbonation level and temperature.
- Ask whether the closure system is included or separate.
- Ask what sample testing or commissioning support is available.
FAQs
Common questions.
Is counter-pressure filling the same as isobaric filling?
The terms are often used together for carbonated filling. The key is whether the machine fills under controlled pressure suitable for fizzy products.
Is gravity filling suitable for fizzy drinks?
Simple gravity filling is usually not the right choice for carbonated drinks because foam and carbonation loss can become difficult to control.
Should I ask for counter-pressure or isobaric in a quote?
Use both terms if you are unsure, then describe the product, container and target output so the supplier can recommend the right route.
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