A sluice valve, also known as a gate valve, opens by raising a barrier out of the way of the fluid. When completely opened, gate valves take up relatively little space along the pipe axis and barely limit fluid flow.
In a pipeline, a gate valve is often used to totally shut off fluid flow or to give full flow in the fully open position. As a result, it may be utilized in either the fully closed or completely open position. A gate valve has a valve body, seat, and disc, as well as a spindle, gland, and wheel for operation. The seat and the gate work together to stop the passage of fluid.
When a gate valve is fully open, the disk is totally withdrawn from the flow stream. When the valve is open, this property provides essentially minimal flow resistance. As a result, a pressure drop across an open gate valve is minimal. When the valve is fully closed, there is a 360° disk-to-seal ring contact surface, ensuring effective sealing. When a disk is properly mated to the seal ring, there is very little or no leakage across the disk when the gate valve is closed.
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