How Volumetric Fillers Ensure Consistent Juice Filling

Views: 1542 Author: Howie SUN Publish Time:
Hot filling pasteurises the product and sanitises the bottle in one pass, which is why acidic juice and tea can be filled without a separate bottle steriliser.
Key facts at a glance
Valve typeHot-fill, up to 85 C
Output range6,000-36,000 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 does the fill temperature actually control?

Fill temperature and hold time together set the pasteurisation result. Below the target, shelf life is at risk; above it, the product cooks and the bottle deforms. The number belongs to the product and the bottle, not to the machine, and it should be written into the acceptance protocol with a tolerance.

What breaks first on a hot-fill line?

Cap seals and filling valve O-rings, because they see the highest temperature every cycle. A seal that is fine on a water line at 20 C will harden in weeks at 85 C. The spare parts list should carry those two items in proportion to the number of valves, not as a single set.

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

For the same duty in another bottle format, the Juice By Volumetric Filler is specified separately.

What does a glass juice line change?

Glass brings mass, breakage and a slower line. It also brings a closure decision: crown, lug or screw. A glass hot-fill line usually runs at a lower rate than the same filler on PET, and the difference is handling and inspection, not the valve.

The Hotfill Type Filling Machine for Juice is the matching unit when this becomes a line project.

What causes a juice line to lose aroma?

Oxygen pickup and excessive heat. Deaeration before the filler, a closed product path and a short hold time protect the volatile fraction. A line that meets its microbial target can still fail on taste if it holds the product hot for too long.

The same question is worked through from another angle in How Automation Reduces Labor in Juice and Water Filling.

How to read the numbers. The capacity tab on the specification sheet gives ranges; treat them as such. 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.

Can hot-fill juice run in standard PET bottles?

No. Standard PET softens and deforms at fill temperature. The bottle needs a heat-resistant geometry, and the mould and preform are part of the project, not an afterthought.

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.

Why does juice lose colour after hot filling?

Heat-sensitive pigments and vitamins degrade above the product temperature limit. The fill temperature and the hold time are the two variables; lowering either protects colour and shortens the microbial margin.

Key takeaways
  1. Pulp needs bore and agitation, not more pressure.
  2. Cap seals and valve O-rings are the first wear items on a hot line.
  3. Cold filling moves the microbial control from the filler to the product and the plant.
  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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