... steel 2Machine:Lathe,CNC,Drilling machine,Milling machine, Q41F-16C Ball Valve 1MaterialDuctile cast iron,Grey cast iron2SandGreen sand,sodium silicate ... ,CNC,Drilling machine,Milling machine,Boring machine,Planing machine 4ProcessSand Casting 5Min Tolerance0.05mm 6Productioncapacity0.5-5000kg 7surface treatmentPowder coating,Painting ...