Volumetric Feeders vs. OLDS ELEVATOR™

Volumetric screw feeders are a commonly used method of metering bulk materials into a process with reasonable accuracy. They utilize an auger, oriented in the horizontal position, driven by a motor with a variable speed drive to feed material at a controlled rate. In order for the auger flights to remain full the feeder is fed by gravity from a hopper mounted above the auger. This hopper must be filled by another means, often a bucket elevator. Typical accuracy rates of 2-5% error at 2 Sigma are realized with volumetric screw feeders.

Checklist of OLDS ELEVATOR™
and Volumetric Feeder Performance Features

	Volumetric Screw Feeder	OLDS ELEVATOR™
Convey Product at 90° Elevation	No	Yes
Convey Product at 45° Elevation	No	Yes
Convey Product at 0° Elevation	Yes	No
Volumetric Flow Control	Yes	Yes
Gentle Handling	No	Yes
Dust Minimization	No	Yes
Explosion Risk Reduction	No	Yes
Footprint Minimization	No	Yes
Low Maintenance	No	Yes
Product Feed at Lowest Level	No	Yes
Quiet Operation	No	Yes
Variable Flow Rate	Yes	Yes
Minimize Product Segregation	No	Yes
Non-Pulsating Discharge	No	Yes
Multiple Discharges Possible (without valves)	No	Yes
Mobile Option	No	Yes

An OLDS ELEVATOR™ can perform the same functions as a volumetric screw feeder while eliminating the need to elevate material to fill the feed hopper. The OLDS ELEVATOR™ simply takes the material from floor level, elevates and meters it directly into the process. One OLDS ELEVATOR™ does the job of two pieces of conventional equipment. And the accuracy of the OLDS ELEVATOR™ meets or exceeds that of conventional volumetric screw feeders. Typical accuracy rates of 1-3% error, at 2 Sigma are realized with OLDS ELEVATORS™.

Bucket Elevators, Elevator Conveyor, Mobile Units, Vertical Conveyors, Pneumatic Conveying System, Screw Conveying Systems, Bulk Material Handling Systems, Bulk Solid Feeders,
Gravimetric Feeder, Volumetric Feeders, Materials Handled, Dust Explosion Prevention, Engineering, Performance Features, Standard Configurations, Test Laboratory