... , DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500; Applicability: gas (air, oxygen ... 0.5 grade, gas, steam 1.0 grade;Range of flow rate: liquid: 0.6-6 m/s, gas: 5-60m ... of meter body: 1Cr18Ni9Ti (other materials supplied by agreement). Vortex flow meter