... drawings: PDF, Auto CAD, Solid work, JPG, Proe- Standard: ASTM, AISI, BS, DIN, JIS, NF Main production ... ) We make them by precision casting, investment casting and steel sand casting process in Ningbo, China ( Valve Casting / Casting valve / ball Valves) 3 ... Offered Customer Design Welcomed ISO9001:2008 quality control and inspectionWe can cast and process any type of iron casting products ...