Screw Conveyor
Reliable Screw Conveyors for Precise and Controlled Material Flow
screw conveyor, also known as an auger conveyor, is a mechanical device that uses a rotating helical screw blade—called a flighting—within a tube or trough to move bulk materials. It is widely used in industries such as agriculture, food processing, chemicals, mining, and wastewater treatment for transporting granular, powdery, or semi-solid materials. The working principle is based on the Archimedean screw, where the rotation of the screw shaft propels material forward along the conveyor’s length. Screw conveyors are highly efficient for horizontal, inclined, or vertical conveying and are especially effective for controlled, metered flow of materials. Key Advantages: Enclosed design prevents dust and contamination. Suitable for a wide range of materials—free-flowing, sluggish, abrasive, or sticky. Customizable for various lengths, diameters, and configurations. Low maintenance and energy-efficient. Common applications include conveying grains, cement, ash, sludge, food waste, and chemicals.
Types of Screw Conveyor
Screw conveyors are classified based on their orientation, design, and application:
Horizontal Screw Conveyor
Most commonly used type. Ideal for transporting bulk materials over short to medium distances. Efficient and cost-effective for free-flowing materials.
Inclined Screw Conveyor
Used when materials need to be moved to a higher elevation. Efficiency decreases with steeper inclines; typically used up to 45°. Requires more power due to gravity resistance.
Vertical Screw Conveyor
Designed for vertical lifting of materials. Compact and space-saving. Common in silo discharge and hopper feeding applications.
Live Bottom Screw Conveyor
Equipped with multiple parallel screws. Used under hoppers or bins to evenly discharge bulk materials. Prevents bridging and ensures consistent flow.
Variable Pitch Screw Conveyor
Features changing pitch along the screw length. Controls material flow rate and prevents surging. Common in metering and feeding applications.
Short Pitch and Half Pitch Screw Conveyors
Reduced pitch increases material compression and prevents rollback. Suitable for inclined or vertical applications.
Tapered Screw Conveyor
Screw diameter or pitch varies along the length. Used for metering or feeding materials with varying bulk densities.