U-Type Screw Conveyor
The U-type screw conveyor is a type of screw conveyor. It is widely used in industries such as grain processing, chemical, building materials, metallurgy, mining, and power sectors, mainly for conveying small granular, powdered, and small lump materials. It is not suitable for transporting perishable materials, highly viscous or easily caking substances, or materials with high moisture content.
- Enclosed & Dust-proof Design
- Space-saving Structure
- Multi-material Handling
- Energy-efficient Operation
- Easy Maintenance
- High Customizability
Industry-Leading U-Type Screw Conveyor Manufacturer
As a leading U-type screw conveyor manufacturer, DARKO brings over 10 years of expertise in designing and manufacturing high-performance bulk material handling systems. Our ISO-certified conveying systems, exported to 30+ countries, deliver reliable solutions for cement, metallurgy, chemical, and grain processing applications – combining energy efficiency with durable construction and smart conveying technology.
Reliable Material Transportation Solutions
- Technical Specifications
- 5 Competitive Advantages
- Applications
- Classification
| Parameter | Specification |
|---|---|
| Capacity | 1-100 m³/h |
| Diameter | Φ100-600mm |
| Max Length | 50 meters |
| Incline Angle | 0-20° |
| Power | 0.55-22 kW |
| Speed | 10-60 RPM |
| Material | Carbon steel/SS304/SS316 |
-
Enhanced Sealing Performance
Unique U-shaped trough + cover plate design achieves 98% dust containment, complying with ISO 9001 and GMP standards for food/pharma applications. -
Energy Saving
Optimized screw design reduces power consumption by 30% compared to traditional tubular screw conveyors. -
Multi-industry Adaptability
Handles diverse materials:-
Food: Flour, sugar, grains
-
Chemicals: Pellets, powders
-
Minerals: Cement, sand
-
Waste: Sludge, biomass
-
-
Easy Maintenance
Features quick-open inspection doors and modular screw segments for fast cleaning/repair. -
Smart Options
Available with IoT sensors (temperature/vibration monitoring) for predictive maintenance.
✔ Food Processing
-
Hygienic design for flour, starch, additives
-
CIP (Clean-in-Place) compatible
✔ Chemical Industry
-
Corrosion-resistant models for acids/alkalis
-
Explosion-proof options available
✔ Building Materials
-
Heavy-duty versions for cement, fly ash
✔ Wastewater Treatment
-
Shaftless design for sludge conveying
I. By Drive Configuration
-
Single-Shaft Drive Screw: Used when U-type screw conveyor length is <35m
-
Dual-Shaft Drive Screw: Applied when U-type screw conveyor length is >35m
II. By Intermediate Hanger Bearing Type
-
M1 – Rolling Bearings:
-
Features 80000 series sealed bearings with additional dust-proof sealing
-
Ideal for applications where lubrication is difficult/undesirable or oil may contaminate materials
-
Excellent sealing performance with extended service life
-
Maximum material temperature: ≤80°C
-
-
M2 – Sliding Bearings:
-
Equipped with dust-proof sealing device
-
Available with bronze bushings, wear-resistant alloy cast iron bushings, or copper-graphite bushings
-
Suitable for high-temperature materials (≥80°C) or moist materials
-
III. By Material of Construction
-
Carbon Steel U-Type Screw Conveyors:
-
Designed for cement, coal, stone aggregates and other abrasive materials
-
Cost-effective solution for industries without special material requirements
-
-
Stainless Steel U-Type Screw Conveyors:
-
Preferred for grain, chemical and food processing industries
-
High cleanliness standards with material contamination prevention
-
Longer service life but higher initial cost
-
U-Type Screw Conveyor Working Principle
The U-type screw conveyor moves materials through a rotating helical screw inside a U-shaped trough. As the screw turns, it pushes materials forward along the trough while the U-shape prevents spillage. This simple yet efficient mechanism handles powders, grains and small particles reliably in horizontal or slightly inclined applications.
Related Products
Why Choose U-Type Screw Conveyor?
The U-Type Screw Conveyor is a preferred choice for bulk material handling due to its efficiency, versatility, and cost-effectiveness. Here’s why industries worldwide rely on it:
✅ 1. Enclosed & Dust-Free Design
-
Prevents material spillage and dust leakage, making it ideal for food, pharmaceuticals, and chemicals.
-
Reduces contamination risks, meeting GMP & ISO standards.
✅ 2. Space-Saving & Compact Structure
-
Fits easily in tight spaces compared to belt or pneumatic conveyors.
-
Ideal for retrofitting existing production lines.
✅ 3. Low Energy Consumption
-
Optimized screw design reduces power usage by 20-30% compared to traditional conveyors.
✅ 4. Versatile Material Handling
-
Handles powders, granules, and small lumps (e.g., flour, cement, plastic pellets).
-
Not suitable for sticky or high-moisture materials (consider shaftless designs instead).
✅ 5. Easy Maintenance & Long Service Life
-
Modular design allows quick cleaning and part replacement.
-
Durable construction (carbon steel, stainless steel 304/316) resists wear.
✅ 6. Customizable for Different Industries
-
Food-grade (SS304/316) options for hygienic applications.
-
Heavy-duty models for cement, mining, and abrasive materials.
Recommended ≤20° for optimal efficiency. For steeper angles, consider our vertical screw conveyor.
Yes! Our shaftless U-type conveyor prevents material wrapping.
Use formula: Q (m³/h) = 47.1 × (D² – d²) × S × n × ψ × C