... for measuring the flowrates of non-corrosion gas such as natural gas, coal-made gas, inert gas and air etc. it is widely used ... ideal measuring device for petroleum, chemistry-industry, industry, domestic boiler, gas pressure regulating case, hotel, restaurant and the scientific and researching ... the flange interface mm50G250.65~400.4~4065:1100:170-30~+60-25~+551.01.617150G400.65~650.4~65100:1125 ...