U-Type Screw Conveyor for Cement and Bulk Powder
U-Trough Screw Conveyor with Removable Covers for Easier Inspection and Maintenance
What Is a U-Type Screw Conveyor?
A U type screw conveyor is a mechanical conveying device with a U-shaped trough and removable cover, designed for transporting cement, fly ash, lime powder and other dry bulk materials.
The rotating screw flight moves material through the trough, while the removable cover allows easier inspection, cleaning and maintenance compared with fully enclosed tubular screw conveyors.
It is commonly used for powder transfer, silo discharge and short-distance conveying applications in cement plants and bulk material handling systems.
For a broader comparison of available designs and selection factors, see our screw conveyor types and selection guide.
Typical Applications
U type screw conveyors are mainly used for horizontal or low-incline transfer between silos, hoppers, dust collectors, mixers and packing equipment.
✅ Discharging cement or fly ash from a hopper
✅ Transferring collected dust below a bag filter
✅ Feeding powder into a mixer or packing machine
✅ Moving dry material between nearby process units
✅ Returning recovered powder to production
This design is suitable for short-distance conveying applications where regular inspection and maintenance access are required.
Suitable Materials
Common materials include:
✅ Cement
✅ Fly ash
✅ Lime powder
✅ Mineral powder
✅ Gypsum powder
✅ Dry mortar materials
✅ Collected dust
Wet, sticky or highly abrasive materials require additional evaluation before selecting the conveyor configuration.
U Type Screw Conveyor Technical Specifications
| Model | Screw Diameter (mm) | Capacity (t/h) | Speed (rpm) | Motor Power (kW) | Trough Width (mm) |
|---|---|---|---|---|---|
| U150 | 150 | 5–20 | 80–120 | 1.5–3 | 200 |
| U200 | 200 | 8–40 | 60–90 | 2.2–4 | 260 |
| U250 | 250 | 15–60 | 60–90 | 3–5.5 | 320 |
| U300 | 300 | 20–90 | 50–80 | 4–7.5 | 380 |
| U350 | 350 | 35–120 | 50–75 | 5.5–11 | 440 |
| U400 | 400 | 45–150 | 45–70 | 7.5–15 | 500 |
| U500 | 500 | 70–180 | 40–65 | 11–22 | 620 |
*These values are for preliminary comparison only. Actual capacity and motor power depend on bulk density, particle size, moisture, screw pitch, filling level, conveying length, inclination and inlet condition.
For general engineering reference, CEMA publishes dimensional and bulk-material application standards for screw conveyors.
Key Features
✅ Removable Upper Covers
Easy access for inspection and cleaning.
✅ Customized Length and Connections
Length, inlet, outlet and flange dimensions can be customized.
✅ Horizontal or Low-Incline Installation
Suitable for different layout requirements after capacity calculation.
✅ Material and Wear Options
Carbon steel, stainless steel and wear-resistant components are available.
How Does a U Type Screw Conveyor Work?
A U-type screw conveyor uses a rotating screw flight inside a U-shaped trough to move bulk materials from inlet to outlet.
The gear motor drives the screw shaft, and the rotating flight pushes materials forward through the trough.
Conveying performance depends on screw diameter, speed, filling level, material properties and installation conditions.
Main Components
A typical unit includes the U-shaped trough, removable covers, screw shaft, helical flights, end and intermediate bearings, gear motor, shaft seals, inlets, outlets and support brackets.
Longer units may require sectional troughs, intermediate bearings or transport joints according to the total conveying distance and container limitations.
U-Type vs Tubular Screw Conveyor
| Comparison | U-Type Screw Conveyor | Tubular Screw Conveyor |
|---|---|---|
| Casing | U-shaped trough with removable covers | Fully enclosed round tube |
| Inspection | Easier access to the screw and trough | More disassembly may be required |
| Cleaning | Suitable for regular internal cleaning | Better where compact enclosure is the priority |
| Installation | Mainly horizontal or low incline | Flexible for compact or inclined layouts |
| Containment | Depends on cover and connection sealing | More continuous casing enclosure |
| Typical Use | Powder transfer with maintenance access | Enclosed transfer in limited space |
Choose a U type conveyor when inspection and cleaning access are important. Choose a tubular model when compact routing or a more continuous casing enclosure is the priority.
For standardized modular conveying of cement and dry powder, an LS type screw conveyor may also be considered.
Information Required for U-Type Screw Conveyor Selection
| Required Information | Customer Should Provide |
|---|---|
| Material | Name, bulk density, particle size and moisture |
| Required Capacity | Conveying rate in t/h, kg/h or m³/h |
| Conveying Length | Horizontal and inclined distance |
| Installation Angle | Horizontal or required inclination |
| Inlet and Outlet | Quantity, position and flange dimensions |
| Temperature | Normal and maximum material temperature |
| Construction | Carbon steel, stainless steel or special requirement |
| Operation | Continuous or intermittent duty |
| Layout Drawing | Installation dimensions and connecting equipment |
Please confirm whether the machine will operate as a conveyor, a controlled feeder or both. Inlet loading and downstream outlet resistance can significantly affect performance.
Manufacturing, Inspection and Delivery
LVRUI manufactures U-type screw conveyors according to customer requirements, including conveyor dimensions, trough design, inlet and outlet arrangement, and drive configuration. Before shipment, key items such as dimensions, screw rotation direction, connection positions and assembly condition are inspected. Long conveyors can be supplied in sections for transportation and on-site assembly.
Recent U Type Screw Conveyor Orders
These U type screw conveyors were manufactured according to customer requirements for trough dimensions, drive arrangement, inlet and outlet connections, and construction material.
U Type Screw Conveyor FAQs
What is a U-type screw conveyor?
A U type screw conveyor uses a rotating screw flight inside a U-shaped trough to transfer cement, fly ash, lime powder and other dry bulk materials.
What is the main advantage of a U type screw conveyor?
The removable cover design provides easier access for inspection, cleaning and maintenance compared with fully enclosed screw conveyors.
What is the difference between a U-type screw conveyor and a tubular screw conveyor?
A U type screw conveyor uses an open trough with removable covers for easier maintenance, while a tubular screw conveyor uses a fully enclosed casing for improved containment.
Can a U type screw conveyor handle cement powder?
Yes. U type screw conveyors are commonly used for cement, fly ash, lime powder, gypsum powder and other dry bulk materials.
Can a U type screw conveyor be installed at an incline?
Yes. U type screw conveyors can be installed at a low incline, but conveying capacity should be recalculated according to the installation angle.
What information is required for a U type screw conveyor quotation?
Please provide material type, required capacity, conveying length, installation angle, inlet/outlet dimensions and site layout information.
Need a U Type Screw Conveyor for Your Application?
Send your material information, required capacity, conveying length and installation requirements. LVRUI will recommend a suitable U-type screw conveyor configuration based on your operating conditions.
✅ Removable cover design for easier inspection and maintenance
✅ Customized length, inlet and outlet arrangements
✅ Carbon steel, stainless steel and wear-resistant options
✅ Technical support for cement and dry bulk material handling