water flow detector 1.Specification:DN25-DN200 2.Max working pressure:1.2MPA We make different sizes of flow detector1. Norminal Dia: DN50,DN65,DN80,DN100,DN125,DN150,DN2002. Rater working pressure:1.2mpa (12bar)3. Retand time:2-90s4. Reaction(l/min):15 Fire flow detector