Description
What a Combi Tank Actually Does in a Winery
A combi tank handles two jobs in the same vessel: alcoholic fermentation and later storage. The 7000 L working volume sits under an 8000 L total capacity, so there is roughly 1000 L of headspace for must expansion, cap management, and pump-over without foam reaching the CIP spray ball. Cellars that bottle in stages usually pick this configuration so a tank does not sit idle from November to March.
Build Details That Matter
Shell and cone are formed from 3 mm SUS304 plate; 316L is available when the tank will see high-acid musts, extended lees contact, or aggressive acidified cleaning. The dimple cooling jacket is welded to the shell and lower cone, with separate inlet and outlet zones if you want independent control of the cone during cold stabilization. Insulation is 80–100 mm polyurethane poured or foamed in place, then clad in stainless sheet — polyurethane is the reason a tank holds 8 °C overnight in a warm cellar without the chiller short-cycling.
Interior welds are ground flush and passivated, with a mechanical polish to Ra ≤ 0.8 µm on wetted surfaces. We pressure-test every jacket and vessel before insulation goes on, since a leaking dimple weld after cladding is a scrap tank.
Typical Applications
Small estate wineries running 5–10 t harvests, custom crush facilities, and fruit wine or cider producers. Conical-bottom units suit red fermentation with racking and lees removal; flat or shallow-cone bottoms are common for white juice settling and storage.
Specifications
| Total volume | 8000 L |
|---|---|
| Working volume | 7000 L |
| Shell material | SUS304 (SUS316L optional) |
| Insulation | 80–100 mm PU, stainless cladding |
| Cooling | Dimple jacket, glycol/water, 2 bar working |
| Design pressure | 0.2–0.5 bar; vacuum/pressure relief valve fitted |
| Surface finish | Inner Ra ≤ 0.8 µm, passivated |
| Fittings | Top manway, CIP spray ball, thermowell, sample valve, racking arm, 1.5 in. butterfly outlets |
FAQ
Can it ferment reds and store whites? Yes, but confirm the cone angle and jacket zoning first — a 60° cone drains lees better than a shallow one.
How is CIP handled? A rotating spray ball on the top manway plus a 1.5 in. drain gives full coverage at 2–3 bar supply pressure.
Fixed or removable top? Removable tops simplify inspection; fixed tops with a 400 mm manway cost less and seal better.
Tell us your batch size, wine type, number of tanks and available ceiling height. We can recommend the tank volume, cooling area and configuration for your winery.
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