Sparkling wine and Prosecco bottling uses counter-pressure (isobaric) filling, because the product is carbonated and must be transferred without losing dissolved CO2. This makes a sparkling line a distinct configuration from a still-wine line, with additional closure stations.
A typical sparkling wine line follows the sequence: glass depalletizer, bottle rinser, isobaric counter-pressure filler, mushroom-cork corker, wirehooder (muselet applicator), capsuler, labeller, case packer and palletizer. Which of these stations are present, and how they are tooled, varies from line to line.
Technical Buying Guide — Used Sparkling Wine Bottling Lines
The isobaric filler is the machine that defines the line. Check its rated working pressure against the pressure your own product and process actually require, and ask for the pressure-vessel and equipment documentation that exists for that specific machine. Counter-pressure valve and seal condition, and the CO2 pre-evacuation or pre-flush system where one is fitted, are the practical wear points to inspect.
Closure stations are format-driven. The corker handles mushroom corks, the wirehooder applies the muselet wire cage, and the capsuler finishes the neck. Ask which cork diameters, muselet sizes and bottle formats the supplied tooling covers — starwheels, jaws, centring parts and labeller drums are usually format-specific.
Sparkling producers often run several bottle shapes and volumes on one line. Before committing, list the formats you intend to run and confirm, item by item, which change parts are included with the specific line and which would have to be sourced separately.
Frequently asked questions
What makes a sparkling wine line different from a still-wine line?
Counter-pressure (isobaric) filling for the carbonated product, plus mushroom corking and a wirehooder that applies the muselet wire cage. Still-wine lines normally use vacuum or gravity filling and a cork or ROPP capper without a wirehooding station.
What should I verify on the isobaric filler?
Its rated working pressure against your product and process, the condition of counter-pressure valves and seals, the CO2 pre-evacuation or pre-flush system if one is fitted, and the pressure-equipment documentation available for that machine.
What is a wirehooder?
A wirehooder applies the muselet — the wire cage that secures a mushroom cork. It sits after the corker and before the capsuler on a sparkling wine line.
Can one line run several bottle formats?
Often yes, but each format needs its own tooling on corker, wirehooder, capsuler and labeller. Ask which format kits are supplied with the specific line.