This book provides a basic, practical introduction to fluid power that related theory to practice. Written from a practitioners" perspective, this book provides practical coverage of both hydraulics and pneumatics. The fourth edition of Fluid Power: Theory and Applications has been revised to include the latest changes and practices in the industry as well as recent changes in international ISO 1219-1 symbols, especially pressure relief and reducing valves. Material has also been reorganized and enhanced to include new illustrations components, and circuits. A valuable reference book for fluid power technicians and fluid power mechanics as well as candidates preparing for the Mechanic, Technicians and Specialist Certification exams offered by the Fluid Power Society.