This course is designed to familiarize participants with the functions performed by various types of valves used in hydraulic systems. After completing this course, participants should be able to describe how valves control flow rate, flow direction, and pressure in a hydraulic system. They should be able to describe the basic operation of a pressure-compensated flow control valve, a temperature-compensated flow control valve, various types of flow control circuits, a pressure reducing valve, a relief valve, a sequence valve, and a counterbalance valve.