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Vertical Screw Conveyors

The productivity of your bulk material manufacturing operations ultimately depends on the speed and efficiency of your equipment supplies. That’s why so many companies rely on Orthman screw conveyors and components for a wide variety of applications, including distributing, collecting, mixing, heating and cooling, elevating, batching and aerating.

The Orthman vertical screw conveyor system is a great solution to many material handling problems by providing a cost effective elevating action with minimum space requirements. The vertical is fed by a horizontal feed screw which is synchronized with by speed and feed rate. Both the feed screw and the vertical are driven by independent screw conveyor drives. We offer this system in multiple materials of construction including carbon, abrasion resistant, stainless or any combination. Although we have standards the length of the feed screw, the height of the vertical as well as the diameter of each can be designed to each specific application.

Orthman screw conveyors can be furnished with all necessary power transmission components, including V-belts, sheaves, motors and guards, all precision-designed to work with the screw conveyor drive.

Vertical Screw Conveyors


  •  Inlet Section

  •  Head Section

  •  Intermediate Sections

  •  Pedestal

  •  Screw

  •  Drive Unit

  •  Feeder Screw

  • Advantages

  •  Efficient Design

  •  Ease of installation

  •  Requires Less Space

  •  More Cost-Effective

  •  Can be Dust Tight

  •  Material Discharge in any direction

  •  Up to 40’ of elevation


  •  Animal Feed

  •  Pet food

  •  Food Processing

  •  Ice

  •  Bulk Powders

  •  Bio solids

  •  Pellets

  •  Bone & Blood meal


  •  Capacities Range from 400 to 6,000 cubic feet per hour

  •  Internal Bearings Can be Used – Not Recommended

  •  Typical Vertical Speeds – 150 to 250-rpm

  •  “Kicker” Paddles at Discharge

  •  Discharge Height is Limited to About 50-Feet

  •  Lateral Support Required at Drive End

  •  Horizontal Feed Screw – 45-Percent Loaded

  •  Horizontal & Verticals Typically the Same Diameter

  •  Must Have Lateral Supports to Structure – Every 10 to 12-Feet


Conveyor screws are the component that moves material from the inlet to discharge. Conveyor screws can have many flight and pitch configurations, and can be fabricated from a variety of materials.