Welded power plant shut-off valves are essential components in thermal power plants, designed for use in water and steam pipelines. The small-caliber welded power plant shut-off valve series is ideal for applications where compact design and reliable performance are required. These valves feature a compact, easy-to-maintain structure with a packing chamber and valve body designed for portability. The valve body and cover are connected using high-rigidity flanges with metal toothed gaskets, ensuring a secure and leak-proof seal. Available in sizes from DN10 to DN40, the valve body material options include carbon steel and chromium-molybdenum-vanadium steel, providing excellent strength and durability. The sealing surfaces are surfaced with cobalt-based alloys for enhanced wear resistance, while the stem undergoes anti-corrosion treatments such as nitriding or electroless nickel plating to improve longevity.
For larger applications, the welded power plant shut-off valve series covers diameters from DN50 to DN100. These valves also utilize carbon steel and chromium-molybdenum-vanadium steel for the valve body, ensuring robust performance under high-pressure conditions. The sealing surfaces are similarly coated with cobalt-based alloys, and the stem is protected against corrosion through nitriding or electroless nickel plating. Additionally, the flange surfaces are treated with phosphorus coating on the studs, further enhancing the valve's resistance to environmental factors. Overall, these valves are engineered for ease of maintenance, long service life, and reliable operation in demanding power generation environments.
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