Screw Conveyor Systems

Screw Conveyors

CMT offers shafted screw conveyors that efficiently convey a variety of bulk materials. The main function of a screw conveyor is to transfer bulk materials from one process to another. A major benefit of using screw conveyors is that they are very cost-effective, requiring minimal maintenance to operate.

 

Screw Conveyor Advantages

screw conveyor

Horizontal Screw Conveyors

Horizontal screw conveyors are the most widely used type of screw conveyor. These conveyors transfer bulk materials from one part of a process to another. Horizontal screw conveyors are available in a wide range of sizes, lengths, configurations and materials of construction.

Screw conveyors are typically designed to convey bulk materials at 15, 30 or 45-percent trough loading, depending upon material characteristics of the specific bulk material. Typically, trough loading of 45-percent can be used for light, free-flowing and non-abrasive bulk materials. Trough loadings of 15 and 30-percent are typically used for denser, sticky and more abrasive bulk materials.

Inclined screw conveyor
Horizontal screw conveyor

Inclined Screw Conveyors

Inclined screw conveyors operate from slightly above the horizontal position to 45-degrees from the horizontal position. If the angle is greater than 45-degrees, an inclined screw conveyor is considered a vertical screw conveyor. As the degree of incline increases, conveying efficiency is reduced and horsepower requirements increase due to the effects of gravity and bulk material fall back. Conveying efficiency is affected by angle of incline, characteristics of the specific bulk material, type of screw conveyor trough and screw pitch. CMT recommends designing screw conveyors using the lowest possible degree of incline for maximum efficiency.

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