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Flexible Screw Conveyors

Technical Details: Basics
Components of a flexible screw conveyor

1

Electric motor: 3 phase, 50/60hz, voltage as specified. Special motors are also available to your specification. Fixed or variable speed.

2

Motor adapter and spiral connector in mild steel or stainless steel

3

45 degree or horizontal outlet assembly in mild steel/painted, or stainless steel

4

Dust-tight tube fitting

5

High and low-level control

6

Abrasion resistant polymer outer tube

7

Flexible screw conveyor spiral in spring steel or stainless steel

8

Inlet assembly in mild steel/painted, or stainless steel

9

Feed restrictor to regulate material flow

10

Feed hopper in standard size or to customer's specifications

11

Optional agitator for difficult materials
Model (N. Amer.)    Capacity lb/hour (approx)  Minimum Radius (feet)           Tube o/d (inches)  
214 1,000 6' 2 ¼"
258 2,000 8' 2 5/8"
318 4,800 14' 3 1/8"
412 14,000 20' 4 ½"
658 26,000 N/A 6 5/8"
834 58,000 N/A 8 ¾"
Model (UK/Europe)  Capacity kg/hour (approx) Minimum Radius (meters) Tube i/d x o/d (mm)     
37 100 2.0 37 x 43
44 400 2.5 44 x 51
55 800 3.0 55 x 63
67 2,000 4.0 67 x 80
80 5,000 5.5 80 x 90
90 7,000 7.0 90 x 100
120 12,000 Rigid 120 x 136
146 22,000 Rigid 146 x 158
196 40,000 Rigid 196 x 222
Throughput rates vary depending on bulk density, material flow characteristics and length and elevation of the conveyor. We recommend material testing to determine the correct model.

 

Flexible screws have many profiles.

Spiral Profiles

For most applications, the standard round spiral is suitable, combining strength and flexibility. Flat section spirals are recommended for certain light or aerated products.

The Proscrew bevelled profile is used for conveying difficult materials such as iron oxide. The semi-rigid construction enables steep conveying angles to be achieved without bends.

The Centre Core is used for very light materials that fluidize readily and for conveyors inclined more than 60°. They are also used to prevent flooding/overfeeding of certain solids in short or horizontal conveyors.

All spirals are heat treated to provide strength and long life. Heavy duty spirals are also available for certain high density or aggressive materials.

These are the basic components of a flexible screw conveyor.