A valve is an apparatus or natural object that manages, directs, or controls the movement of a fluid (gases, fluidized solids, liquids, or slurries) by opening, closing, or partially obstructing several passageways. Valves have assorted needs, which include controlling water for irrigation, industrial uses for controlling processes, residential uses such as on/off and pressure control to dish and clothes washers and taps at home. In this eLearning course, you will learn about the types of valves, functions, parts, advantages & disadvantages of various valves, selection of valves, specification, suitability of valve, operation, and maintenance.