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Shut-off valves provide reliable full-close control for pipelines with minimal sealing surface wear. The valve body can be straight-through, direct-flow, or right-angle, suitable for various fluids including high-viscosity or solid-laden media. The simple structure ensures easy manufacturing, maintenance, and repair. With a single sealing surface and low friction during operation, shut-off valves offer long service life and strong sealing performance, making them ideal for industrial auxiliary services.