Valve | Types, Uses & Benefits | Britannica
https://www.britannica.com/technology/valve-mechanics
WebMar 6, 2024 · valve, in mechanical engineering, device for controlling the flow of fluids (liquids, gases, slurries) in a pipe or other enclosure. Control is by means of a movable element that opens, shuts, or partially obstructs an opening in a passageway. Valves are of seven main types: globe, gate, needle, plug (cock), butterfly, poppet, and spool.
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