At present, manufacturers commonly used casting production spool. Although the casting valve core is simple in process and low in price, defects such as casting pores, sand inclusion and impurities exist, resulting in cracks and micropores on the outer wall of the valve core, which results in low productivity and low qualification rate of the valve core. At the same time, the sand casting precision is low and the mud core is biased, which leads to serious uneven wall thickness of the casting valve core and large machining allowance, which consumes more materials. The new ball valve spool extrusion production of copper, dense tissue, fundamentally avoided the casting process defects, as the upgrading of the casting valve replacement products, it is equivalent to the Italian hot upsetting valve spool, will not be divulged. At the same time, uniform wall thickness, save material, low production costs. Spool working pressure 8Mpa; spool working temperature is less than 100 ℃; wall thickness 2mm, and can be determined according to user needs. The valve core research and development by the Zhejiang Institute of successful. Table 1: The new valve plug and casting process characteristics Comparison of new valve plug casting valve core material density dense loose Loose pass rate of 98% 50% of the production equipment investment is quite high Precision roughing Blank allowance 0.1-O.2mm 3 -5mm Single weight lighter than the new spool 50% Thickness uniformity O.1mm 3mm Low energy consumption in production High production cost Low High product quality Low product reliability No environmental pollution Large Table 2: Different manufacturing process materials (Kg) New Process Spool Weight (kg) Blank 0.55 0.26 Finished Product O.32 0.21 Material Output Rate 0.58 0.81 Number of Spools Made of 3125 Pieces / Tonne 4762 Pieces per Ton Each valve cost than the casting process to reduce 15%