... , spraying,etc OEM cnc cast iron valve body Specifications cast iron valve body 1.Material:ductile iron,grey iron 2 ... investment casting,lost wax casting,die casting etc),forging,machining3.Full quality contral system4.Qualified inspector: ... casting, investment casting, lost wax casting, die casting, forging, stamping, machining etc5min tolerance0.05mm6capacity0.5~5000kg7surface treatmentpowder coating ...