Flexible Screw Conveyor
SYVRAC flexible screw conveyors are designed for the efficient transfer of powders and granules. Their design, featuring a flexible helical screw without a central shaft, ensures a steady flow without clogging and allows the conveying of bulk materials with minimal degradation.
- Easy installation
- Gentle handling
- ATEX compliant
- Curved conveying paths
Flexible solution for silo feeding and discharge
The flexible screw conveyor is a bulk transfer system based on a stainless-steel helix rotating inside a semi-rigid polyamide tube. Unlike rigid screws, it adapts to complex layouts and provides a steady flow without clogging.
Main features
- Flexible installation
- Variable flow rate up to 20 m³/h
- Materials compliant with food and ATEX standards
- Compact footprint
Design of flexible screw conveyorsAdvantages over rigid screws
SYVRAC flexible screw conveyors offer unmatched flexibility compared to traditional rigid screws. Thanks to their shaftless helix, they ensure smooth conveying without clogging, preventing product buildup and reducing premature wear. Unlike rigid screws, which cannot follow curves and increase the risk of blockage, flexible screws allow for natural curved paths, simplifying installation without flow interruption. Their lightweight and modular design make them ideal for silo feeding and discharge, as well as for the transfer of powders and granules over long distances.
Application for silo feeding
In feeding mode, the flexible screw conveyor transfers powders and granules to the storage silo from a hopper, big bag, or another dosing system. Thanks to its ability to follow curved paths, it helps avoid dead zones and minimizes product buildup at the silo inlet.
Application for silo discharge
When used for silo and hopper discharge, the flexible screw conveyor ensures controlled extraction, providing a smooth flow without overloading. This system is ideal for difficult-to-flow powders such as flour, starch, or plastic powders, which tend to form bridges in conventional silos.
Its closed-loop operation minimizes dust emissions and protects the working environment, making it suitable for ATEX zones.
OptionsA complete range for all applications
SYVRAC flexible screw conveyors adapt to all industrial environments thanks to a wide range of options. They can be equipped with clogging sensors, a quick-release system requiring no tools, and a reverse emptying function allowing complete product evacuation without disassembly. For sensitive environments, an ATEX version is available with certified components for the safe transfer of explosive powders. Finally, the motor mounted on a hinge facilitates maintenance and extends the equipment’s lifespan, reducing overall maintenance costs.
Food hygieneThe only fully certified flexible screw conveyors
SYVRAC offers flexible screw conveyors fully compliant with European and American food standards, including CE 1935/2004, FDA, and EHEDG. The materials are specifically selected to ensure safe food contact, with no risk of chemical migration. The absence of a central shaft and the tool-free quick-release system make cleaning easier, reducing the risk of cross-contamination. These features make it the preferred solution for the food industry, particularly for transferring flour, sugar, cocoa, milk powder, and cellulose.
Energy savingsAn alternative to pneumatic systems
Flexible screw conveyors stand out for their low energy consumption, averaging 4 kWh per ton of product transported. Thanks to their optimized design and reduced motorization, they consume significantly less energy than traditional pneumatic conveying systems. Unlike more power-intensive solutions such as pneumatic transfer, they offer maximum efficiency while reducing operating costs. Their low-power operation also helps lower environmental impact while ensuring smooth transfer without product degradation. An ideal solution for cost-effective and high-performance material handling!
Options
Each of our silos is standard; the available options allow us to customize them according to your needs and requirements.
Integrated blockage sensor
ATEX certified design
Tool-free quick-release system
Reverse discharge function
Magnet-coded safety disassembly
Hinged motor mount
Variable flow rate
Our range of flexible screw conveyors
Our range of flexible screws Stainless steel spiral / Polyamide tube
| Model / Reference | Tube diameter (mm) | Max. flow rate (m³/h) | Max. flow rate with density 0.5 (kg/h) | Min. bending radius (m) | Max. length (m) | Operating environment | Spiral pitch (mm) |
|---|---|---|---|---|---|---|---|
| VS-51-STD | 51 | 0.5 | 250 | 2.0 | 25 | Standard industrial | 25 |
| VS-51-FOOD | 51 | 0.5 | 250 | 2.0 | 25 | Food industry | 25 |
| VS-51-ATEX | 51 | 0.5 | 250 | 2.0 | 25 | ATEX 21/22 | 25 |
| VS-51-FOOD-ATEX | 51 | 0.5 | 250 | 2.0 | 25 | Food ATEX 21/22 | 25 |
| VS-82-STD | 82 | 3.0 | 1500 | 2.5 | 25 | Standard industrial | 45 |
| VS-82-FOOD | 82 | 3.0 | 1500 | 2.5 | 25 | Food industry | 45 |
| VS-82-ATEX | 82 | 3.0 | 1500 | 2.5 | 25 | ATEX 21/22 | 45 |
| VS-82-FOOD-ATEX | 82 | 3.0 | 1500 | 2.5 | 25 | Food ATEX 21/22 | 45 |
| VS-90-STD | 90 | 5.0 | 2500 | 3.2 | 25 | Standard industrial | 55 |
| VS-90-FOOD | 90 | 5.0 | 2500 | 3.2 | 25 | Food industry | 55 |
| VS-90-ATEX | 90 | 5.0 | 2500 | 3.2 | 25 | ATEX 21/22 | 55 |
| VS-90-FOOD-ATEX | 90 | 5.0 | 2500 | 3.2 | 25 | Food ATEX 21/22 | 55 |
| VS-115-STD | 115 | 8.0 | 4000 | 5.0 | 25 | Standard industrial | 85 |
| VS-115-FOOD | 115 | 8.0 | 4000 | 5.0 | 25 | Food industry | 85 |
| VS-115-ATEX | 115 | 8.0 | 4000 | 5.0 | 25 | ATEX 21/22 | 85 |
| VS-115-FOOD-ATEX | 115 | 8.0 | 4000 | 5.0 | 25 | Food ATEX 21/22 | 85 |
| VS-140-STD | 140 | 24.0 | 12000 | 8.0 | 25 | Standard industrial | 100 |
| VS-140-FOOD | 140 | 24.0 | 12000 | 8.0 | 25 | Food industry | 100 |
| VS-140-ATEX | 140 | 24.0 | 12000 | 8.0 | 25 | ATEX 21/22 | 100 |
| VS-140-FOOD-ATEX | 140 | 24.0 | 12000 | 8.0 | 25 | Food ATEX 21/22 | 100 |
Construisons ensemble votre solution de stockage
Fabien S.
Expert solution process poudres
Our achievements for Flexible Screw Conveyor
Since 2014, we have acquired solid expertise and experience in installing solutions for the storage, transfer and dosing of powdered raw materials for our customers. Discover our achievements.
