Closed Spiral Belts: production, application and expertise

What a closed spiral belt is

A closed spiral belt is a metal conveyor belt for processes that need a dense carrying surface, a stable run and precise product guidance. It is known in English as a compound balanced belt. Wire spirals are woven tightly into each other to form a flat, strong surface. Small products can travel on it safely, and the belt holds up under high temperatures and mechanical stress.

Main features:

• Dense surface: small items do not fall through or get damaged.
• Stability: the belt runs straight and predictably.
• Heat resistance: suitable for processes up to about 1,150 °C.
• Made to measure: built to the needs of the specific process.

Benefits

• Continuity: steady, straight running keeps downtime and product loss down.
• Robustness: copes with heavy loads and high heat, so the belt lasts longer.
• Even heat transfer: the dense surface treats products uniformly in ovens, sterilisers and heat treatment lines.
• Easy maintenance: Tribelt's in-house production gives consistent quality and straightforward replacements.
• Product protection: small items stay on the belt and are not damaged.

Applications

• Bakery: oven belts on which products are baked directly.
• Pharmaceuticals: sterilisation tunnels for controlled processing of medicines.
• Metal and glass: annealing, tempering, hardening, sintering and brazing.
• Mechanical engineering: discharge belts for machining equipment.
• Heat treatment: curtains or screens that keep heat inside tunnel furnaces.
• Decorative products: for instance in jewellery making, where precision matters.

Tribelt variants and options

• Wide spiral belt WG-I with multiple inserts for versatile use.
• Narrow spiral belt with S-hook (ES) for very small products and precise guidance.

Typical specifications are a pitch of 5 to 25 mm, wire diameters of 0.8 to 3.15 mm, temperatures up to 1,150 °C and widths up to 4,000 mm. Options include side chains, flights, welded edges, raised side plates and PE1000 contact strips for quiet support. Because Tribelt produces everything in-house in Haaksbergen, it can adapt each belt to unusual temperatures, loads or product sizes. See the closed spiral belts product page for full data.

Why choose a closed spiral belt

Where precision, stability and product protection come first, a closed spiral belt is a key part of the line. It combines a dense surface, a solid build and good heat transfer with the flexibility of custom manufacturing. In practice that means fewer damaged or lost products, a long service life with little maintenance, and a production process that keeps running.