The 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 restriction is desired.
The gate faces can form a wedge shape or they can be parallel.
Gate valves are primarily used to permit or prevent the flow of liquids,
but typical gate valves shouldn't be used for regulating flow, unless they
are specifically designed for that purpose.
Slide / Knife Gate Valves
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