SEV Wear-resistant ball valve is mainly used in the transmission pipeline of granular materials and slurry medium in mining, metallurgy, coal, power plant industries. It has high matching adaptability for mud, slurry, coal slurry, sewage and slag water mixture, to ensure a long period of stable operation of the conveying device. After years of experience in the manufacture of wear-resistant ball valves, we have summarized a set of mature design and manufacturing solutions, including the design features of medium anti-deposition, low flow resistance channel, seat self-cleaning,etc. According to the characteristics of various harsh working conditions, the material selection and surface treatment focused on abrasive wear, particle impact wear, PH value, etc.