U-shaped screw conveyors are divided into two types: axial and non axial: axial screw conveyors have a central shaft, which is suitable for conveying materials that are not easy to stick and have certain friction. The wear resistance of screw conveyors has certain requirements, and the shaft and internal bearings for conveying screws in non axial conveyors do not exist. This eliminates the problems of material accumulation and flow blockage. Therefore, the axial screw conveyor is suitable for conveying materials with high viscosity, high moisture content, and poor fluidity, such as sludge, garbage, etc.

The U-shaped trough screw conveyor is an ideal conveying equipment for bulk powder materials. It provides closed transportation and can prevent powder materials from overflowing. The U-shaped trough screw conveyor can add materials from one or more inlets, which is very convenient to use. The U-shaped trough screw conveyor can transport materials both horizontally and obliquely. When space allows, it is a very economical lifting and conveying equipment, but as the inclination angle increases, the conveying capacity will decrease.