In the realm of material handling and processing, sectional flights are critical components commonly used in screw conveyors, augers, and feeders. These spiral-shaped blades are welded onto a central shaft or pipe and play an essential role in the efficient movement of bulk materials in industries ranging from agriculture to mining and manufacturing.
What Are Sectional Flights?
Sectional flights are individual spiral segments, typically cut from flat steel plate and formed into a helix. Each piece represents one complete 360-degree rotation of the spiral. These flights are then welded together—or directly to a central shaft—to form the auger or screw mechanism. Unlike continuous helicoid flights, which are made from a single coiled strip, sectional flights are manufactured one at a time, offering greater flexibility in design and strength.
Applications Across Industries
Sectional flights are used wherever bulk materials need to be moved, mixed, or processed. Common industries that rely on them include:
Agriculture – For moving grain, feed, or fertilizer.
Food Processing – For conveying powders, flours, and semi-solid food products.
Mining & Minerals – For transporting abrasive materials such as sand, ore, and gravel.
Waste Management – For handling sludge, biosolids, or compacted waste.
Chemical & Pharmaceutical – Where precision and durability are crucial in handling sensitive or hazardous materials.
Advantages of Sectional Flights
One of the key advantages of sectional flights is customizability. Because each segment is fabricated individually, it is possible to design flights to exact specifications, including diameter, pitch, thickness, and material. This makes them ideal for heavy-duty or high-wear applications, especially where helicoid flights might not withstand the stresses involved.
Additionally, Sectional Flights can be made from a wide range of materials, such as carbon steel, stainless steel, hardened steel, and even exotic alloys, depending on the application's abrasion resistance and corrosion requirements.
Types of Sectional Flights
Several variations exist, tailored to specific needs:
Standard Pitch Flights – Equal pitch to diameter; used for general material handling.
Short Pitch Flights – Reduced pitch for slower material movement or added compression.
Variable Pitch Flights – Allow controlled flow and reduced clogging.
Ribbon Flights – Open center design to prevent material build-up on the shaft.
Cut & Folded Flights – Improve mixing or aeration of materials.
Manufacturing and Maintenance
Manufacturing sectional flights requires precision forming equipment to ensure consistency. Each section must match the design tolerances to guarantee proper fit and balance. Because these flights often endure harsh conditions, regular inspection and maintenance are crucial. Worn or damaged flights can cause uneven flow, excessive wear on equipment, and reduced efficiency.
Conclusion
Sectional flights are indispensable in industrial systems that move bulk materials. Their strength, customizability, and adaptability make them a preferred choice for demanding applications where durability and performance are non-negotiable. As industries continue to demand more efficient and reliable material handling solutions, the role of sectional flights remains foundational to these processes.
