... powder coating, painting, spraying,etc OEM cnc cast iron valve body Specifications cast iron ... aluminum, zinc etc2sandgreen sand, sodium silicate sand etc3mahinelathe, CNC, drilling machine, milling machine, boring machine, planting ... die casting, forging, stamping, machining etc5min tolerance0.05mm6capacity0.5~5000kg7surface treatmentpowder coating, painting, spraying, galvanization8standardJIS, ANSI, ...