Pipeline bore (mm) Throttling element 1st choice (set) 50, 80, 100, 125, 150, 200, 250, 300 2nd choice (25), 65, 175, 225, 275, 325 Throttling ß Standard orifice 0.44, 0.52, 0.65 Material 1st choice: 1Cr18Ni9Ti; 2nd choice: 2Cr13 Temperature range ? Water Environment temperature ? 0 ~ 50? Application temperature ? 0 ~ 100? Dry gas 0 ~ 50? -25 ~ 200? Wet gas 0 ~ 50? 0 ~ 500? Steam 0 ~ 50? 100 ~ 450? Pressure range Nominal pressure: 2.5MPa, 4.0MPa Relative Humidity =95% Flowing range Same as the traditional standard orifice flow meter Accuracy 1% Protection level IP65 Power supply 24VDC Holding part material 20# steel, A3 steel (optional), 1Cr18Ni9Ti (optional)