wet alarm valve 1) ITEM NO.:ZSFZ100, ZSFZ150, ZSFZ200 2) NOMINAL DIAMETER: 100mm, 150mm, 200mm 3) Factory direct sales wet alarm valveSpecificationAlarm Check Valve, Nominal ... based on the quantitySpecificationsButterfly Valve (Internal structure) 1.16years experience, valve factory 2.Standard: ANSI,ASME,DIN,API609 3.2years guarante wet alarm valve