GL Series Tubular Screw Conveyor for Cement and Bulk Powder
Fully Enclosed Screw Conveyor for Dust-Controlled Powder Transfer and Compact Installation
What Is a Tubular Screw Conveyor?
A tubular screw conveyor is a fully enclosed mechanical conveying device designed for transporting cement, fly ash, lime powder and other dry bulk materials. The screw flight rotates inside a circular tube casing to move material from inlet to outlet while reducing dust leakage and external contamination. This enclosed conveying design is suitable for compact powder handling systems, horizontal or inclined conveying layouts, and applications requiring enclosed material transfer.
For different screw conveyor structures and selection factors, see our screw conveyor types and selection guide.
Screw conveyor dimensions and application practices are commonly referenced in industry standards such as CEMA screw conveyor guidelines.
Features
✅ Fully enclosed tubular structure for dust-controlled conveying
✅ Suitable for cement, fly ash and dry powder handling
✅ Compact design for limited installation space
✅ Horizontal, inclined and vertical installation options
✅ Flexible inlet and outlet configurations
✅ Wear-resistant screw flight options for demanding materials
Technical Specifications
| Item | Specification |
|---|---|
| Conveyor Type | GL Series Tubular Screw Conveyor |
| Diameter Options | Φ159 / Φ219 / Φ273 / Φ323 / Φ355 / Φ407 mm |
| Capacity | 5–200 t/h (depending on material) |
| Conveying Length | Customized according to project requirements |
| Material of Casing | Carbon steel / Stainless steel |
| Screw Flight | Continuous welded or sectional flights |
| Inlet Feeding | Fixed inlet / multiple inlets optional |
| Outlet Discharge | End discharge / multiple outlets optional |
| Drive Power | 1.5–37 kW (based on size & length) |
| Working Angle | Horizontal and inclined installation available |
| Sealing System | Dust-proof sealing and bearing protection |
| Bearings | End bearings and intermediate supports (if required) |
| Applicable Materials | Cement, fly ash, lime powder and other dry bulk materials |
| Optional Features | Inspection covers, anti-wear lining, frequency inverter, level sensors |
| Material Temperature | Standard: ≤80°C (higher temperature requires confirmation) |
The above specifications are reference values for preliminary selection. Actual conveying capacity depends on material characteristics, filling rate, screw speed, conveying length and installation conditions.
Applications
These tubular conveyors are commonly used for enclosed conveying of dry bulk materials in:
✅ Cement plants and powder processing systems
✅ Silo and hopper discharge applications
✅ Dust collection return systems
✅ Feeding mixers, valves and downstream equipment
✅ Compact powder transfer layouts where dust control is required
Advantages
✅ Reduced dust leakage with fully enclosed structure
✅ Compact design for limited installation space
✅ Flexible integration with powder handling systems
✅ Reliable transfer of cement and dry bulk materials
Main Components
A typical GL Series tubular screw conveyor includes:
✅ Tubular casing for enclosed material transfer
✅ Screw flight and shaft assembly for material conveying
✅ Drive unit with motor and reducer
✅ End bearings and sealing components
✅ Customized inlet and outlet connections
Tubular Screw Conveyor vs U-Type Screw Conveyor
Both designs use rotating screw flights to transfer bulk materials, but they are designed for different installation conditions and conveying requirements.
| Tubular Screw Conveyor | U-Type Screw Conveyor | |
|---|---|---|
| Structure | Fully enclosed tube casing | U-shaped trough structure |
| Dust Control | Better sealing and dust control | Requires cover for dust reduction |
| Installation | Suitable for compact layouts and limited space | Suitable for general conveying applications |
| Inspection | Access through inspection openings | Easier open access for inspection |
| Typical Applications | Powder transfer where enclosed conveying is required | Standard cement and bulk material conveying |
For applications requiring dust control, compact installation and enclosed powder transfer, a tubular screw conveyor is often a suitable choice. For general conveying applications where easy inspection and maintenance are important, a U-type screw conveyor may be preferred.
Tubular Screw Conveyor Selection Considerations
Selection depends on material characteristics, conveying capacity, installation space and dust control requirements. Key factors include:
✅ Material type and flowability
✅ Required conveying capacity
✅ Conveying length and installation angle
✅ Available installation space
✅ Inlet and outlet arrangement
Manufacturing and Customization
LVRUI manufactures enclosed screw conveyors according to material characteristics, conveying requirements and installation conditions. Customization options include:
✅ Tube diameter and conveyor length
✅ Inlet, outlet and connection arrangements
✅ Carbon steel, stainless steel and wear-resistant components
✅ Drive configuration according to operating requirements
GL Series Tubular Screw Conveyor FAQs
What is a tubular screw conveyor used for?
A tubular screw conveyor is mainly used for enclosed conveying of cement, fly ash, lime powder and other dry bulk materials where dust control and compact installation are required.
What is the difference between a tubular screw conveyor and an LS screw conveyor?
A tubular screw conveyor uses a fully enclosed tube casing for dust-controlled material transfer, while an LS screw conveyor uses a U-shaped trough structure for general powder conveying applications.
Why choose a tubular screw conveyor for powder handling?
The enclosed tube structure helps reduce material leakage and dust exposure, making it suitable for powder transfer systems where a cleaner conveying environment is required.
Can a tubular screw conveyor be installed at an angle?
Yes. Tubular screw conveyors can be installed horizontally or at an incline according to layout requirements, material properties and conveying conditions.
What materials can a tubular screw conveyor handle?
Tubular screw conveyors are commonly used for cement, fly ash, lime powder, mineral powder and other dry bulk materials. Wet or sticky materials require additional evaluation before selection.
What information is required for a tubular screw conveyor quotation?
Please provide material type, required capacity, conveying length, installation conditions and inlet/outlet requirements for proper configuration.
Need a Tubular Screw Conveyor for Your Application?
Provide your material information, required capacity, conveying length and installation requirements. LVRUI will recommend a suitable tubular screw conveyor configuration according to your application conditions.
✅ Fully enclosed design for dust-controlled powder transfer
✅ Customized tube diameter, length and connection arrangement
✅ Suitable for cement and dry bulk material handling
✅ Technical support for project requirements