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Covering rough castings for various valve types such as gate valves, ball valves, and globe valves, the products are made from materials including cast steel and stainless steel, utilizing mature casting processes to ensure defect-free rough castings (e.g., no sand holes or air pockets). The flow channels and sealing surfaces of the valve body rough castings have reasonable machining allowances, ensuring excellent sealing and flow performance after subsequent processing, and are compatible with water, gas, oil, and other medium transportation systems.