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Twin-screw extrusion system

Nutrex 7 Series

Nutrex 7 Series is our next-generation twin-screw extrusion platform for the food and feed industry. Designed according to EHEDG hygienic design guidelines, delivering highest food and feed safety standards - backed by over 40 years of proven technology.

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Key benefits

Modular, future-proof platform concept
Infinite possibilities. Modular by design - offers scalable modularity, flexible left/right layouts. This enables easy expansion, fast adaptation to new products, capacities, and regulations, ensuring long-term investment security.
Ease of use – designed for operators
Intuitive machine operation, guided processes, clear visualization, and automated functions reduce operator dependency, simplify daily operation, and shorten training time.
Up to -50% cleaning time reduction and audit readiness
Engineered for fast, reliable cleaning and minimized contamination risks. Hygienic design shortens cleaning time, reduces downtime, protects product quality, and safeguards brand reputation while improving overall equipment availability.

Advanced features for the next generation extrusion platform.

Food safety by design

Hygienic extrusion that reduces risks, cleaning time and audit effort

The Nutrex 7 Series is designed according to EHEDG hygienic design guidelines, with stainless-steel construction, wet cleanable systems, and validated cleaning concepts enabling a cleaning time reduction of up to -50 %. Hygiene is embedded in the machine architecture – not added through procedures – reducing contamination risks, audit pressure, and total cost of ownership.

Extrusion control system

One control system. Hygienic, intuitive, future-ready.

The Nutrex extrusion machine control adapts to your process - not the other way around. This unified, hygienic machine-to-plant automation platform features a 24″ wet-cleanable HMI with a new real-time process visualization, intuitive operator interface, user defined KPIs, browser-based operation, and built-in food safety. Ready for today's demands and tomorrow's growth.

Preconditioner

Precise mixing. Controlled retention. Hygienic by design.

The hygienic two-stage preconditioning ensures defined moisture, temperature and residence time – improving homogeneity, reducing extruder torque and enabling stable, energy efficient extrusion with up to 50% lower mechanical load. The patented cleaning lance concept achieves highest levels of hygiene and enables effective internal cleaning.

Cutter

Precision cutting. Hygienic handling. Consistent quality.

The new patented cyclone cutting process delivers stable cutting patterns, high visibility and hygienic product handling. Designed for safety, fast cleaning and consistent quality, it reduces deposits, wear and downtime while supporting reliable downstream processing.

Extruder

New system – proven extrusion process

Nutrex 7 Series builds on 40 years of Bühler twin-screw extrusion DNA. It combines unchanged, proven process geometry with a completely new machine design – delivering familiar process behavior, recipe compatibility and fast scale up, ensuring continuously high levels of end-product quality.

As the first prototype customer of the Nutrex 7 Series extrusion system, we were closely involved in the development process. The collaboration with Bühler was pleasant and effective. We were particularly impressed by the easy integration into our existing line as well as the significantly simplified handling. The intuitive control system makes day-to-day operation noticeably easier.

Martin Kropfitsch,
Owner and Managing Director, Kärntner Mühle

Key topics

Billions of people come into contact with Bühler technologies to cover their basic needs for food and mobility every day. Our motto is creating “innovations for a better world.” Find out more about our key topics.

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