Hot Water Steriliser
A hot water steriliser that brings packaged product to temperature through recirculated water, giving a gentler heat profile than steam for glass and cans.
Key Specifications
| Temperature | 85-95 degrees C |
|---|---|
| Capacity | 2,000 - 20,000 packages per hour |
| Heating | Steam injection into water bath |
| Zones | Pre-heat, sterilise, cool |
| Container types | Glass bottles, cans, pouches |
| Water circulation | Forced, with filtration |
| Control | Per-zone temperature with data logging |
Water transfers heat more evenly than steam
Steam condensing on a package creates a large local temperature difference and a risk of thermal shock on glass. Recirculated hot water holds the whole package surface at a uniform temperature, which is why it is preferred for glass and for products sensitive to over-heating.
Zone design controls breakage
Pre-heating in steps of 15-20 degrees C keeps the temperature gradient across the glass wall within safe limits. A single-step plunge from 20 to 90 degrees C will break bottles regardless of glass quality.
Cooling is part of sterilisation
Cooling too fast produces the same thermal shock as heating too fast. A staged cooling zone also prevents the vacuum that pulls contaminated water into a poorly sealed cap.
Typical Applications
- Glass bottled beverages — Uniform water temperature avoids the thermal shock that cracks glass under steam.
- Craft beer and cider in bottles — Gentler profile preserves delicate aroma better than a hard pasteurisation tunnel ramp.
- Ready-to-drink tea and coffee — Products sensitive to over-heating benefit from the controlled water profile.
Related Equipment
Frequently Asked Questions
How is this different from a tunnel pasteuriser?
It is a similar principle with a different focus: a hot water steriliser targets higher temperatures and microbiological reduction, while a pasteuriser targets a defined PU dose at lower temperature.
Can it handle pouches?
Yes with carrier trays. Pouches need support to avoid deformation at temperature.
What water quality is needed?
Potable water with filtration; the bath is recirculated and treated to avoid biofilm.
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