... .: 1.6MPa , PN 16, Wet alarm valvenamed as alarm check valve,ductile cast iron1) Applicable areas: workshops, warehouses, hotels, shops, ... recreational places, hospitals,cinemas, offices, garages2)Nominal diameter size: 100mm(4"),125mm(5"),150mm(6"),200mm(8")Main Technical ... . and Dia. φA (mm)ZSFY1001.2DN1002201808*φ18ZSFY150DN1502852408*φ22ZSFY200DN20034029512*φ22 fire alarm check valve