this book includes modern flow schematics and associated process descriptions. compressors, cryogenic, and hot gas expanders are identified at their respective locations on the process flow schematics. it explains the underlying principles, operating modes, selection issues and major hardware elements. the reader learns about the main features of over 300 processes that involve compressors and expanders in modern industry. the introductory material covers topics like: flow coefficients, surge control, estimating compressor performance, applications for air separation and gas processing plants, petroleum refinery issues, and process flow schematics. with this book, personnel in job functions that include compressors and compression processes gain an understanding of how compressors and turboexpanders work. being able to refer to the hundreds of associated process flow schematics will greatly facilitate comprehending what goes on in the various petrochemical, oil refining and product upgrading processes that are served by these machines.