This book provides a practical introduction to dynamic and positive displacement compressors, including compressor performance, operation, and problem awareness. In reading this book readers will learn what is needed to select, operate, and troubleshoot compressors. Complete with real-life case histories, the book demonstrates investigative techniques for identifying and isolating various contributing causes, including design deficiencies, manufacturing defects, adverse environmental conditions, operating errors, and intentional or unintentional changes of the machinery process that usually precede failure.