Fluid Mechanics of Control Valves is a practical, experience-driven handbook that explains how control valves work and how to select, size and maintain them. This book covers valve types (globe, butterfly, ball and three-way), actuators and positioners, valve-sizing methods for liquids and gases, and how thermodynamic effects, such as choked flow, cavitation and auto-refrigeration, affect performance. It also guides readers on efficiency and power consumption, noise and vibration sources, practical noise-reduction strategies, sanitary valve design for food and biotech, fail-safe actions, inspection and testing, and modern concerns such as cybersecurity and loop stability. This book also provides clear definitions, examples, tables and real?world advice to make complex fluid and acoustic concepts accessible.