U-Type Screw Conveyor for Cement and Bulk Powder

What Is a U-Type Screw Conveyor?

A U type screw conveyor moves dry bulk material through a U-shaped steel trough by means of a rotating helical screw. Jiangsu LVRUI Machinery manufactures U type conveyors for cement, fly ash, lime powder, mineral powder, gypsum and other dry materials. Removable upper covers provide access to the screw and trough, making this design suitable for applications that require regular inspection, cleaning or maintenance.

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 best suited to short-distance conveying where maintenance access is important. A tubular screw conveyor may be preferable for compact routing with a continuous round casing, while vertical lifting normally requires a bucket elevator.

Suitable Materials and Operating Limits

Common materials include cement, fly ash, lime powder, mineral powder, gypsum, dry mortar ingredients, collected dust and other free-flowing dry powders or small granules.

Wet, sticky, fibrous or strongly compacting materials require separate evaluation because they can build up around the shaft, reduce capacity and increase drive load. Abrasive, high-temperature or combustible materials may require special flights, liners, bearings, seals or safety provisions.

The conveyor is normally installed horizontally or at a low inclination. As the angle increases, material fallback can reduce capacity and raise power demand. Applications approaching 20° must be recalculated and confirmed according to the material and screw design.

Reference Technical Specifications

Our U Type Screw Conveyors are available in various sizes to handle cement, fly ash, limestone powder, coal powder, and chemical powders. The specifications ensure efficient and reliable material transport for small to large cement plant installations.

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.

Final specifications must be confirmed in the approved technical drawing.

For general engineering reference, CEMA publishes dimensional and bulk-material application standards for screw conveyors.

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 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 each unit according to approved dimensions and order requirements. The supply scope can include the trough, screw shaft, covers, bearings, seals, gear motor, supports and matching flanges.

Before shipment, the main dimensions, screw rotation, inlet and outlet positions, cover arrangement and external finish can be checked.

Longer conveyors may be shipped in sections for reassembly by the customer or local installation team.

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

Need a U-Type Screw Conveyor for Your Application?

Send us your material, required capacity, conveying length, installation angle, inlet and outlet dimensions, and operating conditions. LVRUI will review the application and recommend a suitable U-type screw conveyor configuration.