Drag Chain vs Scraper Conveyor: Which Is Right for Your Industry?

Drag chain conveyors and scraper conveyors are often seen as the same thing, because both drag material with a chain. But there are important differences that decide which one suits a given application. Let's compare.

Working Principle

A drag chain conveyor (en-masse) moves material inside an enclosed casing, where the material travels as a single mass with minimal internal friction. Dust stays contained and efficiency is high.

A scraper conveyor uses flight bars to drag material along an open or semi-enclosed trough. It suits heavy, abrasive materials such as ash and coal.

Quick Comparison

• Dust: drag chain wins — fully enclosed system.
• Heavy abrasive material: scraper holds up better with its wear-resistant steel trough.
• Capacity: drag chain is generally higher (up to 1,200 t/h).
• Cleanliness: drag chain keeps production areas cleaner.

When to Choose a Drag Chain Conveyor

Choose drag chain for dusty or hot material, or wherever housekeeping matters — for example high-capacity handling of cement clinker, sugar or fertilizer.

When to Choose a Scraper Conveyor

Choose a scraper for power plant ash handling, coal handling and abrasive bulk materials where dust is less of a concern.

Conclusion

Neither is "better" in absolute terms — the choice depends on your material, capacity and priorities (cleanliness vs abrasion resistance). Talk to a VOLER engineer for the most cost-effective solution.