Screw Conveyors

Screw Conveyors/Auger feeder

Rieco's screw conveyors are expertly engineered to transport powders and granular materials efficiently and reliably at the desired angle of inclination. Featuring a rotating helical screw blade—known as a "flight"—within a tube, pipe, or U-trough, these stainless steel conveyors are a standout solution in the world of bulk material handling.

The design centers around a spiral blade coiled around a shaft, which is driven at one end and held at the other. Crucially, the rate of volume transfer is proportional to the shaft's rotation rate, enabling precise control over material flow of various type of powders and bulk solids.

In industrial settings as leading manufacturer, Rieco’s screw conveyors excel as variable rate feeders. By adjusting the rotation rate of the shaft, operators can deliver a specific quantity of material into a process, with various types of Rieco screw conveyors ideal for both loss-in-weight and gain-in-weight dosing applications.


  • Horizontal screw conveyor: Horizontal screw conveyors, the most widely used is used to convey bulk materials from one part of a process to another in horizontal direction. Horizontal screw conveyors are available in a wide range of sizes, lengths, configurations and materials of construction.
  • Inclined screw conveyor: Inclined screw conveyors typically operate from slightly above the horizontal position to 45o from the horizontal position. As the degree of incline increases, conveying efficiency is reduced and horsepower requirements increase due to the effects of gravity and bulk materials may fall back. We have gained the expertise in designing inclined screw conveyors with increased efficiencies.
  • Vertical screw conveyor: TVertical screw conveyors are a very efficient method for elevating a variety of bulk materials at very steep inclines or completely vertical. We consider any screw conveyor located on an incline over 45o to be a vertical screw conveyor. The compact design allows for the vertical screw conveyor to fit into almost any plant layout.
  • Reversible screw conveyor: In complex industrial processes a solution for effectively and efficiently metering dry bulk solids from a silo/hopper into one of two locations is required. It requires two delivery points to be served. It is a good practice to use a common extractor, rather than providing two outlets in the storage container, as separate outlets give rise to unsatisfactory features of dead storage regions and eccentric flow stresses. We provide a reversible screw feeder with a central inlet, which proves to be the ideal solution.
  • Flexible screw conveyors: A flexible screw conveyor moves and elevates bulk material by rotating a helical-shaped auger inside a casing. It is typically used to elevate powders and granular bulk materials into mixers, packaging machines or storage bins. They are called flexible screws because the auger portion of the conveyor is a shaftless design and the casing is typically Ultra High Molecular Weight Poly Ethylene (UHMW-PE). The spring-like auger and the UHMW-PE casing allows smaller diameter conveyors to be flexed or bent around fixed objects or to change the position of the discharge head.

In summary, whether horizontal, inclined, vertical, reversible, or flexible, our screw conveyors are engineered for precision, efficiency, and adaptability, catering to the unique needs and challenges of modern industrial processes.


  • Efficient Material Handling: Capable of transporting a variety of bulk materials, both powders and granular, efficiently and reliably.
  • Versatile Application: Suitable for horizontal, inclined, and vertical installations, allowing for a wide range of applications in various industries.
  • Customizable Design: Available in various sizes, lengths, configurations, and materials of construction to meet specific handling needs.
  • Controlled Material Flow: Ability to precisely control the rate of material flow through adjustable rotation speed, making it ideal for dosing applications.
  • Space-Saving Layout: Compact and modular design that requires minimal space, facilitating easy integration into existing plant layouts.
  • Low Energy Consumption: Generally requires less power to operate, contributing to lower energy costs.
  • Easy to Install and Maintain: Designed for simplicity in both installation and maintenance, reducing downtime and associated labor costs.
  • Easy to Clean: Simply open the hinged covers to access the auger/screw for easy cleaning.
  • Heavy Duty Construction: Built for durability and designed to withstand demanding industrial conditions.
  • Bottom Cleanout: Designed for ease of drain at wash-down, simplifying cleaning and maintenance.
  • Efficient Distribution: Capable of distributing bulk materials to various locations using multiple inlet and discharge points.
  • Totally Enclosed Design: Ideal for dusty, corrosive, or hazardous environments, ensuring safety and cleanliness.
  • Totally Portable: Conveniently designed with caster wheels for easy mobility and repositioning.
  • Durable and Long-lasting: Typically constructed from robust materials that withstand wear and tear, leading to a long service life.
  • Low Maintenance Cost: Simple and robust design usually results in low maintenance requirements and costs over time.
  • Adaptability to Different Materials: Capable of handling a wide variety of materials, including those that are sensitive, abrasive, or corrosive.

Why Rieco?

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