| Filling method | Isobaric, CO2 counter-pressure |
| Capacity | 12,000-36,000 BPH at 0.2-2 L |
| Containers | PET bottle, glass bottle, aluminum can |
| CO2 handling | Pre-pressurisation and return pipe, no venting |
| Valves | Mechanical, semi-electric or volumetric |
| Line scope | Water treatment, syrup mixing, carbonation, filler, pack |
A carbonated drink is a saturated solution held in equilibrium by pressure and temperature. If the filler exposes it to atmosphere, CO2 leaves the liquid as foam and the fill level collapses. Isobaric filling pressurises the bottle to the bowl pressure first, fills under counter-pressure, then releases in a controlled ramp.
Size the filler on peak shift demand with a production factor of 0.65-0.85, then size the CO2 supply on average consumption, not peak. A CO2 plant built for the filler nameplate runs partly loaded for most of the year and loses more gas to vaporisation than the line saves in speed.
| Valve type | Setting | Best for |
|---|---|---|
| Mechanical | Fixed cam profile | Single product, long runs |
| Semi-electric | Signal-timed open and close | Recipe changes within one product family |
| Volumetric | Chamber dose | Pressure or temperature drift during the shift |
| Isobaric + volumetric | Chamber dose under counter-pressure | High CO2 with tight fill accuracy |
The unit behind this configuration is the Isobaric Filling Machine for CSD and Sparkling Water.
A can is filled and seamed, a PET bottle is filled and capped. Cans run faster per unit and are counted in CPH; PET allows larger formats and a lighter package. The filler principle is the same isobaric one, the closing equipment and the line rate are not.
The unit behind this configuration is the CSD & Sparkling Water by Mechanical Filler.
The product circuit is cleaned on a fixed cycle, and the filler bowl is rinsed and sanitised before production. Residual cleaning chemical and residual water both affect taste and carbonation, so the final rinse is verified, not assumed.
The same question is worked through from another angle in How to Optimize Nitrogen Doser Settings for CSD.
No. Carbonation needs isobaric valves under counter-pressure; still water runs gravity or volumetric. A combiblock can carry both valve sets, but they are specified separately and are not interchangeable at the push of a button.
Usually product temperature rising in the bowl or a worn valve seal. Both change the pressure balance, so the fill cuts off earlier. Log bowl temperature and fill weight together for one shift before changing any valve.
It is used where the package needs internal pressure support or low oxygen, for example in cans and in some PET formats. It is an option, not a default, and it adds a consumable cost per 1,000 units.
The higher the volumes, the sharper the mouthfeel and the more pressure the package must hold. Higher carbonation also needs a colder fill and a tighter pressure ramp, so it reduces practical line speed.
Country: Kazakhstan
Product: PET Bottled Carbonated Soft Drinks
Capacity: 12000BPH (1L)
Solution:Carbonated Drinks Production Line
Country: Syria
Product: Aluminum Canned Carbonated Soft Drinks
Capacity: 24000CPH (250ml)
Solution:Carbonated Drinks Production Line
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