Processing Equipment for Juice Production: Prior to Filling

Views: 3101 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. Understanding the nuances and importance of extraction, filtration, mixing, pulp removal, and viscosity control is paramount in ensuring the production of high-quality juice products.
Key facts at a glance
Filling systemHot-fill, up to 85 C
Capacity6,000-36,000 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

How do you keep pulp and fibre moving through the line?

Pulp needs either a larger valve bore or a piston filler, and it needs continuous gentle agitation in the bowl. Dead corners in the product path settle fibre, then release it as a slug into the next bottle. Bowl geometry and return-flow design matter more than valve count here.

Understanding the nuances and importance of extraction, filtration, mixing, pulp removal, and viscosity control is paramount in ensuring the production of high-quality juice products.

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

Throughput and change-part lists are on the Juice By Volumetric Filler page rather than in this note.

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.

The specification sheet for the Hotfill Type Filling Machine for Juice carries the utility figures quoted here.

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.

By prioritizing extraction, filtration, mixing, pulp removal, and viscosity control, bottled water plant managers can enhance operational efficiency, product consistency, and overall customer satisfaction.

The same question is worked through from another angle in How Piston Fillers Handle Thick Juices Accurately.

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.

How to read the numbers. The output figures are specification ranges; the measured rate depends on the product and the shift. Pasteuriser heat-up, hold and cooling sit outside a rated BPH, so plan 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.

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.

How long does a hot-fill line take to reach temperature?

It depends on the hold tube volume and the heater capacity. The line is not production-ready until the return temperature is stable, so start-up time belongs in the daily plan rather than being discovered at shift start.

What cooling profile does a hot-fill bottle need?

A controlled ramp rather than a cold plunge, so the bottle does not deform under vacuum. The tunnel zones are set per bottle geometry and validated with a temperature probe in the product.

Key takeaways
  1. Pulp needs bore and agitation, not more pressure.
  2. A change of fill temperature invalidates the shelf-life trial.
  3. Colour loss is a temperature and hold-time decision.
  4. Cool the bottle on a ramp, not a plunge.
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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