Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)


Agricultural Engineering


In recent years, mechanized farming has started to apply pneumatic systems to feed handling for livestock. These systems are divided as low-volume high-pressure, low-volume medium-pressure, and high-volume low-pressure. The latter two best fit the requirements for agricultural applications. However, the high-volume low-pressure type lacks adequate research for utilization in feeding systems. It is felt that certain aspects of this system are more advantageous than higher pressure systems, yet a number of disadvantages also exist. The high-volume low-pressure system, like in other types, has similar component parts necessary for operation. The differences among the various types of pneumatic conveyors are the pipe size and fan or compressor capabilities. With lower pressure systems, pipe size has a greater diameter, and the fan has capabilities of handling greater quantities of air at lower pressures. The feed injector, in a pneumatic conveyor, is a mechanical device used to inject the material into the conveying duct. It has a number of advantages that give it preference over the star wheel and other types of injectors. First, its cost is only a fraction of the star wheel type injector. Second, air losses of the auger injector are much less than the loss for other types. However, research on the injector has been limited to specific agricultural applications. Additional research is needed so that it may become a standard module of pneumatic systems.

Library of Congress Subject Headings

Pneumatic-tube transportaion
Conveying machinery
Pneumatic machinery
Feed mechanisms


Includes bibliographical references



Number of Pages



South Dakota State University