... treatment:powder coating, painting, spraying,etc OEM cnc cast iron valve body Specifications cast iron valve ... material and process1.Available material: cast iron,steel,stainless steel,brass,copper,aluminum,zinc etc2.Casting(sand casting ... ductile cast iron, steel, stainless steel, brass, copper, bronze, aluminum, zinc etc2sandgreen sand, sodium silicate sand etc3mahinelathe, CNC, drilling machine, ...