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 ships) AS and BS(for merchant ships)medium:water,pipe and so onpressure:1.6, 1.0, 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.,ltd ...