GB/T585-1999,flanged cast steel valves,used for war ship and merchant ships,provide CCS certificate. cast steel stop valvestype:A and B (for war ... .0, 2.5, 4.0, 6.4MPamaterial of stop check valves:bronze,brass,gun metal,cast iron,forged steel.cast steel,stainless steel,nodular cast ironjiangyin marine valves co ...