... for war ship and merchant ships,provide CCS certificate. cast steel stop valvestype:A and B (for war ships) AS and BS ... .0, 6.4MPamaterial of stop check valves:bronze,brass,gun metal,cast iron,forged steel.cast steel,stainless steel,nodular cast ironjiangyin marine valves ... provide warm,quick and considerate service for u. flanged cast steel globe check valves