Pre-caution alarm valve Item:ZSFU100-4",ZSFU150-5",ZSFU200-8" Pre-caution alarm valve1) Item No.: ZSFU100, ZSFU150, ZSFU2002) Nominal diameter: 100mm, 150mm, 200mm3) Nominal working pressure: 12bars(1.2Mpa)4) Strength test pressure: 48bars(4.8Mpa) Pre-caution alarm valve