... treatment:powder coating, painting, spraying,etc OEM cnc cast iron valve body Specifications cast iron valve ... ,machining3.Full quality contral system4.Qualified inspector:provide best quality products to clients 1materialgrey cast iron, ductile ... bronze, aluminum, zinc etc2sandgreen sand, sodium silicate sand etc3mahinelathe, CNC, drilling machine, milling machine, boring machine, planting machine, ...