Gate valves, also known as sluice valves, are designed to open by lifting a gate or barrier out of the path of the fluid. This design allows the gate valve to provide an unobstructed flow path when fully open, resulting in minimal flow resistance. Gate valves are typically used to completely shut off the flow of liquids rather than regulate it, making them ideal for applications where a straightforward on/off function is needed.
When the valve is open, the gate is lifted into the valve bonnet, allowing fluids to flow freely through the valve with virtually no obstruction. When closed, the gate is lowered to block the flow path, effectively stopping the fluid. The gate faces can be parallel, but they are most commonly wedge-shaped to ensure a tight seal when the valve is closed.
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