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The gate valves are so called because the gate-shaped wedge inside is the most used, as well as the most abused, type of valve. Though designed to isolate or connect fluids, they are sometimes wrongly used for flow control.
They are normally used in applications where a minimum restriction to the flow of fluid is a design requirement and only an On-Off type of control is required.
Production of chemicals,
Gas Industry, Oil refineries, Water treatment,