The most common and traditional type of valve. The valves are large to accommodate the yoke and stem mechanism, but fully open the full bore design provides an uninterrupted flow path. Generally either used fully open or closed, for on/off isolation, and not used for modulating flow control duties. Variants include Solid and Flexible Wedge Gates, Double Disc Gates, Through Conduit Valves, Parallel Slide Valves and Knife Gate Valves.

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