Avoid refrigeration compressor damage

is president of Flexware Inc. in Grapeville, Pennsylvania. He has been involved in the design of high-efficiency centrifugal compressor staging, field-testing of compressors and steam turbines, and troubleshooting field performance problems for over 40 years. While most of this time was with Elliott Co., he is presently with Flexware Inc., a company focused on turbomachinery engineering consulting services, training seminars and software for turbomachinery performance analysis. Mr. Gresh received a BS degree in aerospace engineering from the University of Pittsburgh. He has published a book on compressor performance, and holds several patents related to turbomachinery. He is a registered professional engineer in the state of Pennsylvania.