quick shutting valve,GB/T5744-93,cast steel material, PN---0.25Mpa DN--- ... ,cast steel,ductile iron,stainless steel,SS316,ANSI316 and so on.Size:20A-150AType: AS,ASS,AQS,AQ,BS,BQ,BSS ... catalogue consult.Also we can supply valves according to customer’s request and can ensure the delivery time will be punctual ... quote best competitive price to u. cast steel quick shutting valve for marine use