Brass Gate Valves
Hand picked by the All Valves experts, a selection of some of the best value for money valves from various brands.
Brass Gate Valves and Sluice Valves Often Used in the Petroleum Industry
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. Because of their ability to cut
through liquids, gate valves are often used in the petroleum
industry. On opening the gate valve, the flow path is enlarged in a
highly nonlinear manner with respect to percent of opening.
This means
that flow rate does not change evenly with stem travel. Also, a
partially open gate disk tends to vibrate from the fluid flow. Most of
the flow change occurs near shutoff with a relatively high fluid
velocity causing disk and seat wear and eventual leakage if used to
regulate flow.
Typical gate valves are designed to be fully opened or
closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.
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