quick shutting valve,GB/T5744-93,cast steel material, PN---0.25Mpa DN---20A-150A CAST STEEL GB STANDARD QUICK SHUTTING VALVEMaterial:cast iron,bronze,cast steel,ductile iron,stainless steel,SS316,ANSI316 and so on.Size:20A-150AType: AS,ASS,AQS,AQ,BS,BQ,BSS,BQSCertificate:CCS,ABS,BV,RINA,GL and other ship inspection certificateMade by jiangyin marine valves co.ltdIf u are interested in our ...