gate valve body 1.material:ductile iron/grey iron/carbon steel 2.OEM Service offered 3.sand:Green sand,sodium gate valve body1MaterialDuctile cast iron,Grey cast iron2SandGreen sand,sodium silicate sand 3MachineLathe,CNC,Drilling machine,Milling machine,Boring machine,Planing machine 4ProcessSand Casting 5Min Tolerance0.05mm 6Productioncapacity0.5-5000kg 7surface treatmentPowder coating,Painting, ...