Expander treatment enhances the nutritional value of ruminant feed by increasing available protein and amino acids. Increased hygiene is another benefit. Heat and pressure produced during expansion destroy pathogens, such as salmonella. The process also removes weed seeds. In Norway, the expander has produced compounds guaranteed free of wild oats. Production-wise, the expander treatment improves the technical properties of the feed and assures feed quality. Pre-conditioning with an expander typically improves pellet quality and pellet press capacity. The method increases addition of liquid ingredients, including fat and molasses. Expandate is a non-pellet expanded feed of particular value for cattle, pigs and poultry.
Our expanding line is equipped with an Expander Kahl, Model OE 15-1/2, assembled to an electric motor 75 kw. Max. capacity 1.2 t/h. Machine is locally steered by Kahl steering system. Preconditioning temperature can be up to 90 °C (retention time approximately 30 seconds); in the expander barrel, temperature can reach 130 °C (retention time 5-10 seconds).