By opening, closing, or partially obstructing different passages, a valve regulates, directs, or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries). Ball, butterfly, diaphragm, gate, pinch, piston, and plug valves are examples of isolation valves. Ball, butterfly, diaphragm, globe, needle, pinch, and plug valves are examples of regulation valves. Safety relief valves:...