iSTER, inline Sterilization System

Inline UHT Sterilizer (iSTER)

Trusted by food & pharma producers across Europe:

  • Adisseo customer of Fluidz engineering
  • Flora Food customer of Fluidz engineering
  • Lamb Weston customer of Fluidz engineering
  • Dopharma pharmacy industry, customer of Fluidz engineering
  • Aviko Rixona klant van Fluidz engineering
  • High Care Clean rooms is klant van Fluidz engineering
  • Gourmet Ingredients is klant van Fluidz engineering
  • Klant van Fluidz engineering: IFF
  • Bavaria is klant van Fluidz
  • Amixo Comakers & (re)Packers in food

The advantages of the Inline UHT system

1. Maximum safety

Voordeel 1 van inline pasteur: verhoogde veiligheid

Because the Inline UHT sterilizer is fully integrated into your production line, you maintain control over the entire process. From product input to finished product: everything runs in a controlled and reliable manner.

Furthermore, the iSTER is equipped with various safety systems, such as dual temperature recording and pressure monitoring on the heat exchanger sections. This reduces the risk of food safety issues and ensures the continuous quality of your product.

2. Longer shelf life

Voordeel 2 Pasteur Langere houdbaarheid

Due to the controlled conditions, the temperature remains constant. This extends the shelf life of your products and reduces waste.

3. Preservation of character and quality​

Voordeel 3 Inline Pasteur kwaliteitsbehoud

Unlike traditional sterilization methods, inline sterilization minimizes the risk of overheating. As a result, taste, texture, and nutritional value are better preserved.

4. Efficient production

Voordeel 4 Pasteur efficiëntie

The inline design will become part of your existing production line. This saves space and labor time and ensures a more efficient production process.

5. Regenerative

Voordeel 5 Pasteur is regeneratief

The heat from your products is reused within the production process. This way, you save energy and produce more sustainably.

Applications of Inline UHT system

The iSTER is a versatile system and suitable for:

  • Dairy products, such as milk, ice cream mix, and cream
  • Plant-based dairy, such as oat milk and soy drink
  • Protein drinks
  • Baby food
  • Fresh (fruit) juices and soft drinks
  • Sauces, soups, and marinades
  • (Fermentation) cultures
  • Culture media

 

 

Sterilized products by the UHT

Your product determines the UHT system

 

iSTER, inline Sterilization System

No two products are the same. That is why we fully tailor the Inline Sterilizer to your process and product characteristics. We consider the sterilization temperature, heat exchanger type, holding time, cleaning, service life and aseptic/ non-aseptic version. Based on this, we put together the optimal configuration for a reliable process and maximum product quality.

For products that require it, we can expand the UHT system with direct steam injection (DSI) or steam infusion (SI).

Test facilities

Do you have no experience with sterilization (yet)? No problem. At our test location, we can test small batches (10-20 liters) of your product. This way, you will know what the taste, texture, and product quality are like after a UHT treatment.

Contact

Ins & outs

3 Types of heat exchangers

Based on your product features, we configure the iSTER with the appropriate heat exchanger: a plate heat exchanger, tube heat exchanger, or scraped heat exchanger. This ensures the system aligns perfectly with your product and process.

In the videos below, you can see the different heat exchangers in operation.

Plate heat exchanger

Tube heat exchanger

Scraped heat exchanger

  • Fast and accurate!

    Amixo mixes and (re)packages powders and liquids. Then I know that Fluidz can always help me if needed.

    I’ve known Dominique for about 15 to 20 years. He knows where he is talking about and is service-oriented. When I call, he responds quickly and accurately. If you have a problem, he always knows how to find a solution because of his experience.”

    Jan Spiering
    General Manager Amixo BV

  • Unburdened

    “Fluidz knows how to unburden.
    A while ago, a heat exchanger was broken and the supplier gave a long delivery time.
    Dominique then thinks along, with the result that we have a temporary installation within 2-3 days. Or take the flow switch , which was not readily available, so that we were in danger of coming to a standstill. He came up with an alternative, which allowed us to keep running.

    Fluidz therefore has a copy of such a part in stock.

    From time to time, third parties also come to work in the pilot plant on behalf of Fluidz.
    If necessary, someone from Fluidz will come along so that we can continue to do our own work, while the mechanics do their work. That is indeed unburdening.”
    Read more

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    Kees Montanus

    Kees Montanus
    Engineering and Maintenance Manager Hive (Unilever Foods Innovation Centre)

Intuitive operation

The iSTER is equipped with a standalone PLC control and a user-friendly touchscreen. Operators can easily adjust settings and monitor the process in real time via the control screen.

Additionally, the UHT system features a logging function that stores critical parameters per batch.​

The inline sterilizer communicates effortlessly with other installations within your production line via Profinet. This allows the system to integrate seamlessly into your existing production process.

UHT-systeem sterilisatie

The iSTER is equipped with a logging function

 

Specifications

  • Capacity from 200 l/h up to and including 40 m³/hour
  • Plate or tube heat exchanger or scraped heat exchanger
  • Suitable for high and low viscosity products
  • Skid mounted
  • Fully automatic
  • Fully CIP/SIP cleanable

Technical specifications can be found in the brochure.

Brochure iSTER

Options

  • Regenerative heat recovery
  • Indirect heating
  • Deaerator
  • High-pressure system
  • (Aseptic) homogenizer
  • Direct Steam Injection (DSI)
  • Steam Infusion (SI)

EHEDG

The components and equipment items of the iSTER system are of the very highest quality level (manufacturer Alfa Laval) and have EHEDG certifications.

EHEDG member since 2025

Connecting systems

Mobile CIP
Basic CIP
Cold Process Water Unit
Hot Process Water Unit
Sterile Tank
Aseptic Bag-in-Box Filler
Clean/ Culinairy Steam generator

Advice on the Inline UHT Sterilizer

Curious whether an inline UHT system fits within your production process? We are happy to discuss the possibilities for your product and installation.
If you leave your details next to this, we will contact you shortly.

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