Enclosed horizontal or inclined conveying of powders, granules, and semi-solid materials using a rotating helical screw. Low headroom, fully enclosed, gentle handling — the most common mechanical conveying method in bulk material handling.
The screw conveyor is the workhorse of mechanical bulk material handling — a rotating helical screw (auger) inside an enclosed trough or tube that moves material along its length. ENZAC designs and supplies screw conveyors for powders, granules, pellets, and semi-solid materials across a wide range of industries.
Screw conveyors are fully enclosed, preventing dust escape and product contamination — making them ideal for connecting process equipment in a closed system. They require minimal headroom compared to belt or bucket conveying, and can operate horizontally or at inclines up to approximately 30°.
U-trough screw conveyors are the standard configuration — cost-effective, easy to access for cleaning and maintenance, suited to most free-flowing and moderately cohesive materials. Tubular (enclosed) screw conveyors provide full containment, better suited to fine powders, dusty materials, or where complete dust-tight operation is required.
Screw conveyor capacity depends on screw diameter, pitch, rotational speed, and the material's bulk density and flowability. ENZAC sizes screw conveyors based on your specific material data sheet and required throughput — variable frequency drives (VFD) allow fine control of feed rate where needed.
For abrasive materials, ENZAC offers hardened or wear-resistant lined screw conveyors to extend service life. Food-grade stainless steel construction available for hygienic applications.
| Specification | Detail |
|---|---|
| Configuration | U-trough (open) or tubular (enclosed) |
| Diameter Range | 150mm – 500mm (larger on request) |
| Construction | Mild steel or stainless steel SS304/316 |
| Incline Capability | Horizontal up to 30° incline |
| Drive | VFD-controlled gearmotor |
| Capacity | 1–100 t/hr depending on diameter and material |
| Bearing Type | End and intermediate hanger bearings |
| Options | Wear-resistant lining, jacket for heating/cooling, dust-tight cover |