... alarm valve 1) ITEM NO.:ZSFZ100, ZSFZ150, ZSFZ200 2) NOMINAL DIAMETER: 100mm, 150mm, 200mm 3) Factory direct sales wet alarm ... valveSpecificationAlarm Check Valve, Nominal Dia.:DN80mm,DN100mm(4''),125mm(5''),150mm(6''),200mm(8'') ductile cast ironnominal W.P.: 1 ... 30days based on the quantitySpecificationsButterfly Valve (Internal structure) 1.16years experience, valve factory 2.Standard: ANSI, ...