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The material of our valve pipe is hi-phosphorus alloy cast iron, which is a kind of hi-technology developed by Italian FIAT Company and further improved by Nanjing IVECO Auto Valve Pipe Company. The material is of high endurance from harsh attrition, high temperature, extreme concussion and strong erosion. Moreover, it can also work well when it is lack of lubrication. The valve pipe can last as long as 150,000-300,000 kilometers. As the appointed product by Nanjing IVECO, our valve pipe works much longer than those made of powder metallurgy technology.