A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restric頞速ion is desired. The gate faces can form a wedge shape or they can be parallel. Typical gate valves should never be used for regulating flow.
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