Food powder transfer by flexible screw conveyor
custom-built solution
The Transitube: at the heart of our transfer solutions since 1961.
1962 :
Blaise Rastoin, our founder, commercialises the first Transitube.
2026 :
Latest generation of the Transitube – same core principle, 65 years of innovation.
A simple, reliable and durable mechanical principle.
The Transitube consists of a rotating flexible screw inside a closed, flexible and robust food grade tube, designed to integrate easily into your existing production line. Its mechanical action – renowned for its reliability and durability – conveys all powder types and flow properties from point A to point B, without difficulty and without agglomeration. The screw diameter, tube diameter and rotation speed are all custom-dimensioned to meet your target flow rate and powder behaviour.
Designed specifically for food powder transfer…
The Transitube :
A configuration adapted to every type of food powder:
Depending on your powder type, we engineer your Transitube to include dosing, bridge breaking, lump breaking, extraction, loading systems…
Free-flowing powder
Direct transfer, long distances, significant height differences. Continuous transfer.
Fluctuating-flow powder
The system integrates extraction and dosing to stabilise the flow.
Poor-flow powder
Integrated bridge breaking and lump breaking systems to guarantee uninterrupted flow.
At the heart of a complete solution…
At Transitube International, we support our clients from A to Z with solutions designed around their powder type, constraints and needs. Depending on your project, the flexible screw Transitube can be part of a broader, more complete solution.
Your coating project is unique.
Our support is custom-built.
Frequently asked questions - Food powder coating
A flexible screw conveyor is a closed mechanical conveying system made of a rotating flexible screw inside a tube. It moves bulk food powders from one point to another on a production line — without dust, without product loss, and without contact with outside air. It is one of the most reliable and energy-efficient powder transfer technologies available for the food industry.
Every Transitube system is custom-built. There is no off-the-shelf product. We design each installation around your specific powder type, flow rate, transfer distance, installation constraints and production environment. From the screw diameter to the tube configuration, every parameter is engineered to match your exact requirements.
Flexible screw conveyors handle virtually all food powders: free-flowing powders such as flour, sugar, salt and starch, as well as more difficult powders such as cocoa, spices, milk powder, proteins and sticky or hygroscopic ingredients. Each Transitube is configured specifically for your powder’s flow properties and bulk density.
Yes. The Transitube is specifically designed to integrate into existing production environments. Its flexible design adapts to bends, angles, height differences, through-wall passages and confined spaces — without requiring major modifications to your existing line.
Flexible screw conveying uses a purely mechanical action — no compressor, no filtration system, no continuous airflow. This means up to 30% less energy consumption, significantly lower maintenance costs, and no risk of product degradation caused by high-velocity air. It is also a fully closed system, which eliminates dust and cross-contamination risks.
Yes. The Transitube is certified for ATEX zone 0/20, making it suitable for use in potentially explosive atmospheres — a critical requirement when handling fine food powders such as flour, starch or sugar.
The Transitube is built for long-term industrial use. Some units have been running continuously for over 20 years at our clients’ sites — on the same production line, without replacement. The screw and tube materials are selected specifically for your powder type and operating environment.
Yes. Transitube International operates worldwide. Our flexible screw conveyor systems are installed in over 75 countries, across Europe, the Middle East, Asia, Africa and the Americas. Wherever your production site is located, we provide the same level of support — from project study to commissioning.
When you contact us, one of our transfer experts will analyse your project and provide a free, no-obligation implementation study. This covers your powder type and flow properties, your installation constraints, your target flow rate, and a recommended configuration for your Transitube system.