How to Troubleshoot Volumetric Fillers in Juice Production

Views: 1459 Author: Howie SUN Publish Time:
A juice line that runs at the right temperature holds shelf life; one that runs hot enough to deform the bottle trades shelf life for rejects.
Key facts at a glance
Filling methodHot-fill, up to 85 C
Rated output6,000-36,000 BPH at 0.2-2 L
ContainerHeat-resistant PET geometry, or glass
LineHot-fill monobloc with tunnel pasteuriser
ProductsJuice, tea, nectar, functional drinks
Key controlFill temperature, hold time, cap seal

What are the symptoms, and what usually causes them?

Start from the symptom and work back to the mechanism, not from the part list. Most filling faults show up in three places: fill weight or level, closure integrity, and product condition. Which of the three moved first tells you whether the cause is mechanical, thermal or product-side.

How do you compare a hot-fill line with a cold-fill line?

Compare them on the product, not on the machine. Hot fill suits acidic juice and tea in heat-resistant PET. Cold fill needs a preservative system or a separate sanitising step, but it protects heat-sensitive flavours and vitamins and uses a lighter bottle. The decision is a product decision with a packaging cost attached.

RouteTemperatureWhat it costs
Hot fillUp to 85 CHeat-resistant bottle and a cooling tunnel
Cold fill with preservativeAmbientFormulation constraint, not a machine constraint
Cold fill with in-line pasteuriserProduct-side onlySeparate pasteuriser and a closed filling zone
Hot fill in glassUp to 85 CGlass mass, slower line, higher transport cost

Valve count, utility schedule and footprint sit on the Juice By Volumetric Filler page.

When is cold filling the better route?

Cold filling protects heat-sensitive flavour and colour and allows a lighter bottle. It needs either a preservative system or a validated cold chain, and it moves the microbial control to the product and the plant rather than to the filler. The decision is commercial before it is technical.

Sizing for this duty runs through the Hotfill Type Filling Machine for Juice, where the valve count is set out.

What does a tea line need that a juice line does not?

Tea usually needs finer filtration, deaeration to protect aroma, and a fill temperature that does not strip the volatile notes. Tea also clouds after cooling, so the clarification step is part of the product design, not a filling detail.

The same question is worked through from another angle in Benefits of Volumetric Hotfill Machines for Glass Bottles.

How to read the numbers. Capacity figures are the reference ranges on the product specification. A rated BPH covers filling only. Pasteurisation, hold time and cooling sit outside it, so size on 0.65-0.85.

Frequently asked questions

What temperature is juice hot-filled at?

Up to 85 C, set per product and per bottle. The exact set point and tolerance belong in the product specification, because acidity, pulp content and bottle wall thickness all move it.

Does hot filling replace pasteurisation?

It replaces the bottle steriliser for acidic products, because the fill temperature and hold time do the microbial work. It does not replace correct product formulation or a validated hold tube.

Can one line run juice and tea?

Yes, if the filler, the recipe and the downstream cooling are specified for both. Tea usually needs a finer filtration step and a different deaeration setting, so the changeover is a recipe and filter change, not just a new label.

Can a hot-fill line run clear juice and pulp juice?

With a filter change and a different valve bore for the pulp, yes. Clear juice needs finer filtration, and pulp needs agitation in the bowl so the fibre does not settle.

Key takeaways
  1. Hot fill does pasteurisation and bottle sanitising in one step, and charges for it in bottle cost.
  2. Fill temperature is a product and package number, not a machine setting.
  3. A change of fill temperature invalidates the shelf-life trial.
  4. Colour loss is a temperature and hold-time decision.
About the author
Written by the Sunswell engineering team - led by Howie SUN, Founder & CEO, with 14 years in filling and blow-moulding equipment R&D and turnkey project delivery across 71+ countries.
Last reviewed: 2026-08-28 . Reviewed by Sunswell engineering team
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