Products Description
Need a reliable, dust-free solution for horizontal or inclined transport of powders and granules?
Guanjiang's Screw Conveyor (Spiral Feeder) provides efficient, enclosed material handling for fine powders to abrasive granules. The fully sealed tube or U-trough design prevents dust emission and external contamination, ensuring minimal material loss and maximum operational hygiene. With customizable flighting options and durable stainless steel or carbon steel construction, it seamlessly integrates with mixers, hoppers, and packaging lines.
Key Advantages
Fully enclosed tube or U-trough design prevents dust emission and external contamination — protects operators and maintains product purity.
Options include standard pitch, variable pitch, or ribbon flights — tailored for sticky, fragile, or free-flowing materials.
Available in SS304, SS316L, or Carbon Steel with reinforced bearings for long-term industrial use in demanding environments.
Modular design allows seamless connection with mixers, hoppers, bag dump stations, or packaging machines — custom inlet/outlet flanges available.
Optional ribbon screw or agitator prevents bridging and clogging of sticky or cohesive materials.
Capable of horizontal or inclined (up to 30°) material transport — flexible for various plant layouts.
Removable trough covers and split packing glands for quick inspection and seal replacement.
Technical Specifications
| Parameter | Standard Range |
|---|---|
| Screw DiameterNon<td style="padding: 10px; border: 1px solid | 100mm ~ 800mm (4" ~ 32") |
| Conveying LengthNon<td style="padding: 10px; border: 1px solid | 1m ~ 30m (custom longer lengths available) |
| CapacityNon<td style="padding: 10px; border: 1px solid | 0.5 m³/h ~ 100 m³/h (material dependent) |
| Material of ConstructionNon<td style="padding: 10px; border: 1px solid | Carbon steel / SS304 / SS316L / SS316Ti |
| Flighting TypeNon<td style="padding: 10px; border: 1px solid | Standard pitch / Variable pitch / Ribbon / Cut & folded |
| Drive PowerNon<td style="padding: 10px; border: 1px solid | 0.75 kW ~ 45 kW (geared motor with frequency inverter optional) |
| Operating TemperatureNon<td style="padding: 10px; border: 1px solid | -20°C ~ 150°C (higher with cooling jacket) |
? Customization & Options:
Sealing options: Standard stuffing box / Mechanical seal / Air-purge seal (for fine powders)
Special finishes: Mirror-polished interior (GMP grade), hard chrome plating, or ceramic coating for abrasive materials
Accessories: Hopper with bridge breaker, flow control valve, speed sensor, and quick-clean trough design
ATEX compliance: Explosion-proof motors and anti-static flighting available for hazardous dust environments.
Screw Conveyor FAQs
Q1: How do you handle materials that tend to bridge or clog?
A: We can equip the screw feeder with a ribbon-style screw (instead of standard full-pitch) or add a bridge-breaker (agitator) in the hopper. These options prevent material arching and ensure smooth, consistent flow — ideal for sticky or cohesive powders.
Q2: What is the difference between a tube screw conveyor and a U-trough screw conveyor?
A: Tube screw conveyors are fully enclosed (round pipe) — best for fine powders where dust control is critical. U-trough conveyors have an open-top trough with a cover — easier to clean and inspect, suitable for granular materials. Both can be sealed for dust-free operation.
Q3: Can the screw conveyor handle abrasive materials without excessive wear?
A: Yes. For abrasive materials (e.g., sand, cement, carbon black), we recommend hardened steel flights or surface-hardened screw and replaceable wear liners inside the trough. Heavy-duty bearings and shaft seals are also specified. This extends equipment life significantly.
Q4: How do you clean the screw conveyor between different products?
A: For sanitary applications (food/pharma), we offer a quick-clean design with removable trough covers and split packing glands. The screw can be easily withdrawn for washing. For automated cleaning, we can add CIP spray balls and a flushable discharge outlet. All interior surfaces can be mirror-polished to Ra<0.4μm.
Q5: What is the maximum length for a single screw conveyor?
A: Without intermediate bearings, maximum length is typically 10-12 meters (depending on screw diameter). For longer distances, we install intermediate hanger bearings every 6-8 meters. We've supplied systems up to 30 meters for grain and cement handling.
Need a custom screw conveyor for your bulk material handling line?
Request a Quote → Download Datasheet (PDF)* Please provide your material type, required capacity (m³/h or kg/h), conveying distance, and any GMP or ATEX requirements for a fast, accurate quotation.
