Twentebelt's TwenteStack™ is a stainless steel self-stacking spiral conveyor belt designed for industrial food processing applications, particularly spiral freezing and cooling systems. Engineered for both existing installations and new self-stacking spiral systems, the belt features a self-supporting design in which successive tiers stack directly on top of one another, allowing long conveyor lengths to be accommodated within a compact footprint.
The belt's self-stacking construction provides product support and allows airflow through the spiral system, supporting continuous operation in freezing and cooling processes. TwenteStack™ is supplied as a metal conveyor belt rather than a complete spiral freezer, cooler or conveyor installation.
Its design incorporates optimized side plates, improved welded connections and form-fit engagement to enhance stacking stability, reduce wear and support reliable long-term operation. The manufacturer also identifies energy efficiency, reduced maintenance requirements and cost-effectiveness among the product's advantages.
Design and Key Features
TwenteStack™ combines full stainless steel construction with a mechanical design developed for self-stacking spiral conveyor systems. Its principal features include:
- Self-stacking construction: Each conveyor belt tier rests directly on the tier below, forming a self-supporting spiral structure.
- Optimized side plates: Designed to improve interlocking between successive tiers and maintain stacking stability.
- Improved welded connections: Strengthened assembly for increased durability.
- Form-fit engagement: Engagement within the side plate slots is designed to reduce wear.
- Stable belt movement: Consistent stacking geometry supports predictable operation.
- Energy-efficient design: Developed to support efficient operation in self-stacking spiral systems.
- Reduced maintenance: Improved component durability is intended to extend belt service life and reduce maintenance requirements.
- Hygienic construction: An open stainless steel structure supports airflow and cleaning.
- Configurable dimensions: Belt widths, side plate heights, mesh configurations and wire diameters can be selected to suit individual applications.
- Replacement compatibility: Designed for existing self-stacking systems and new installations, subject to technical compatibility.
Stainless Steel Construction and Food Safety
TwenteStack™ is manufactured entirely from stainless steel, without plastic modules or hybrid components. Its metal construction provides the mechanical strength, dimensional stability and corrosion resistance required for industrial food processing environments. The open belt structure facilitates airflow around conveyed products and supports cleaning during routine sanitation procedures. The design is suitable for demanding processing conditions, including low-temperature applications and intensive wash-down procedures.
According to Twentebelt, TwenteStack™ is manufactured in compliance with applicable food safety requirements, including Regulation (EC) No. 1935/2004 concerning materials intended to come into contact with food and Regulation (EC) No. 2023/2006 on good manufacturing practice.
Applications in Food Processing
TwenteStack™ is designed for self-stacking spiral systems used in industrial food processing. Its principal applications include:
- Industrial spiral freezing systems.
- Industrial spiral cooling systems.
- Food processing installations requiring long conveyor lengths within a compact footprint.
- Replacement of worn conveyor belts in existing self-stacking spiral systems.
- New self-stacking spiral installations requiring configurable stainless steel conveyor belts.
Its self-supporting construction enables long conveying paths within a relatively small installation footprint, while the open mesh supports airflow and product handling during temperature-controlled processing.
Technical Specifications
- Product type: Self-stacking metal spiral conveyor belt.
- Material: Stainless steel AISI 304 / 302.
- Belt pitch: 60 mm.
- Cross-rod spacing: 30 mm.
- Cross-rod diameter: 5 mm.
- Collapse: Bi-directional.
- Overall belt widths listed in the specifications table: 420, 460, 510, 580, 640, 660, 760 and 920 mm.
- Standard spiral wire diameter: 1.6 mm.
- Optional spiral wire diameters: 1.4, 1.7 and 1.8 mm on request.
- Lateral spiral wire pitches: 6, 9 and 13 mm, with additional configurations available on request.
- Side plate heights: 60, 80, 100 and 120 mm.
- Useful width between side plates: Overall belt width minus 44 mm.
- Construction: Full stainless steel, without plastic modules.
Specification note: The manufacturer's specifications table lists a 920 mm overall belt width, while its FAQ lists 600 mm instead. Availability of these dimensions should be confirmed directly with Twentebelt.
Belt Configuration and Identification
TwenteStack™ is available in multiple configurations to accommodate the requirements of different self-stacking spiral systems. Twentebelt uses a product identification code to specify the belt's principal mechanical characteristics.
Example: TWS 13 – 60 – 1.6 – 5 / H80
- TWS: TwenteStack™ product designation.
- 13: Lateral spiral wire pitch of 13 mm.
- 60: Belt pitch of 60 mm.
- 1.6: Spiral wire diameter of 1.6 mm.
- 5: Cross-rod diameter of 5 mm.
- H80: Side plate height of 80 mm.
Available mesh configurations include M9 and M13, with additional options available on request. Belt width, side plate height, mesh type, wire diameter and material specifications can be selected according to the requirements of the installation.
Customization and Technical Support
Twentebelt manufactures TwenteStack™ for machine builders and industrial food processors requiring metal conveyor belts for self-stacking spiral systems. The company provides technical assistance with belt selection, configuration and replacement assessment. Its support also extends to conveyor belt design and commissioning requirements. By combining configurable dimensions, optimized stacking geometry and full stainless steel construction, TwenteStack™ provides a replacement and new-installation solution intended to maintain reliable conveying performance, reduce wear and extend the service life of industrial spiral freezing and cooling systems.
