船用日标铸钢5K10K16K20K球阀/角阀/截止阀/截止止回阀日标法兰铸铁截止阀/截止止回阀JISF7305F7306F7307F7308F7377F7388F7309F7310F7310船用法兰铸钢截止阀/截止止回阀JISF7351F7352F7409F7410F7353F7354F7375F7376F7377F7378F7471F7472F7473F7474F7411F7412F7413F7414,F7351F7352F7409F7410F7411F7412F7413F7414船用日标法兰青铜截止阀/截止止回阀JISF7301F7302F7303F73046公称压力；PN5K10K16K20K30K40K,适用介质，海水，淡水，滑油，不高于300℃的水蒸汽。阀体；灰铸铁/铸钢，阀杆；锡青铜，手轮；灰铸铁公称通径DN50-DN500.型式AJ型BJ型。船用阀门)