... iron valve body 1.material: ductile iron, grey iron 2.surface treatment:powder coating, painting, spraying,etc OEM cnc cast iron valve body Specifications cast iron valve body 1.Material:ductile iron,grey iron ... , boring machine, planting machine, machining center4processsand casting, investment casting, lost wax casting, die casting, forging, stamping, machining etc5min tolerance0.05mm6capacity0.5 ...