Book excerpt: Formatted with an abundance of illustrations, this primer provides the engineer and student with a basic understanding of the key fundamentals involved in the design of pneumatic valves and controls used to regulate pressure temperature and flow. From easy-to-use equations and formulas based on theory and experience, schematics of various types of valves and controls, and simplified block diagrams that show the influence of various control functions the reader will develop a comprehensive understanding of this interesting subject.