Chemical Process Simulation and the Aspen HYSYS Software Michael E. Hanyak, Jr. Department of Chemical Engineering Bucknell University Lewisburg, PA 17837 This electronic HYSYS v7.3 manual is a condensed version of your purchased HYSYS v7.3 manual. It contains mostly those pages that have web links. Use the bookmarks to the left to go to a specific page. This electronic HYSYS v7.3 manual is a condensed version of your purchased HYSYS v7.3 manual. It contains mostly those pages that have web links. Use the bookmarks to the left to go to a specific page.