Vertical Screw Conveyor Feeder Guidelines
| Screw Diameter (Inches) | Capacity (Cubic Feet per Hour) | Recommended Horizontal Feeder Screw Speed (RPM) |
|---|---|---|
| 6 | 400 | 179 |
| 9 | 1,300 | 162 |
| 12 | 3,000 | 160 |
| 16 | 6,000 | 127 |
Note: The horizontal screw feeder speed recommendations are based on calculations at full pitch and 45% trough loading. The horizontal screw feeder and vertical screw conveyor should have the same screw diameter.
KWS recommends the use of a horizontal screw feeder with all vertical screw conveyor applications for continuous uniform intake and optimal performance of the vertical conveyor.
Rotational Guidelines
Straight Inlet
- Horizontal feed screw can be left hand or right hand
- Vertical screw can be left hand or right hand
Right-Hand Offset Inlet
- Horizontal feed screw MUST be left hand
- Vertical screw MUST be right hand
Left-Hand Offset Inlet
- Horizontal feed screw MUST be right hand
- Vertical screw MUST be left hand
Note: Straight inlets require an internal hanger bearing at the
discharge of the horizontal feeder to support the non-drive
end of the screw.
