Automated conveying Customized for your application

AFC Spiralfeeder™ Flexible Screw Conveyor System

Introducing the market’s most versatile, customized solution for moving bulk materials.

This flexible screw conveyor is designed and manufactured as a complete system tailored to the goals and requirements of each installation. Work directly with a highly skilled engineer every step of the way from design to production, free testing, installation – and follow-though.  

What is it

The SPIRALFEEDER® is an enclosed tubular conveyor designed for conveying powders, granules, blends, crystals, flakes and a wide range of other bulk materials. Typical applications include the conveying of bulk solids into overhead surge hoppers or the conveying of materials from one processing point to another, efficiently, quietly and dust-free.

How it works

The spiral (round/flat/knife) coupled directly to a motor/drive, rotates concentrically within the stationary outer tube. Both the pitch and rpm of the spiral create a positive directional displacement of the bulk material within the outer tube, propelling the material towards the outlet. The material is gently conveyed in an “en masse” fashion from point of entry (inlet) to point of discharge (outlet) – without exposure to the plant environment.


  • Low Cost
  • Low Maintenance
  • Only (1) Moving Part
  • Easily Installed
  • Easily Cleaned
  • Dust-Tight
  • Flexible
  • Quiet
  • Rugged Construction
  • Quick Disassembly
  • No Air
  • No Vacuum
  • No Internal Bearings

Construction Features

The SPIRALFEEDER® is available in carbon steel with durable industrial coatings or in stainless steel with industrial or sanitary finish.

  • F.D.A./U.S.D.A. – approved abrasion resistant U.H.M.W. polyethylene outer tubes
  • Heat treated spirals (round/flat/knife) for heavy duty construction

Automatic Operation

The SPIRALFEEDER® can be interlocked with a wide variety of controls to automate your process operation, in addition to factory engineered/pre-wired controls to suit your exact process requirements.


AFC manufactures a complete line of tubular SPIRALFEEDER® systems and related material handling equipment for the chemical, food, pharmaceutical, plastic, and other industries. We offer both standard and custom engineered powder processing systems to meet your specific needs.


AFC delivers top-quality service to match top quality equipment. From the first call to installation and beyond, AFC engineers are “on call” to keep your process up and running.

Test Facility

AFC offers free product testing and process analysis in our modern, fully-equipped test facility. Most applications can be replicated and demonstrated to ensure a higher level of application reliability in advance of a purchase decision. Customer participation is always welcomed on-site or by livestream.

The new raw material hopper and conveyor system is working well. Thanks for the great service.
Dan Cassidy
Solvay Specialty Polymers

Stationary Flexible Conveyor Systems

Spiral Types

The Round Spiral

Provides maximum flexibility and strength, due to the round cross sectional design.

The Flat Spiral

Provides greater conveying performance at a reduced rpm.

The Knife Edge Spiral

Proprietary AFC advance handles difficult materials that cake, pack or smear to upgrade most traditional mechanical conveyors.

Additional Products

Batch-weigh System

Bag Dump Station

Get Started building your custom conveyor system.

Work directly with an experienced engineer who understands how to convey powders and bulk solid materials so you get the perfect solution for your process.

Register for Instant access to use our Bulk Density Calculator

Registration is quick and easy, and you’ll get instant access to start using it right away!