... 60Nominal Diameter(mm)DN20DN25DN50DN80DN100DN150DN200DN250DN300ConnectionFlangeMaterialCast steelExecutive StandardQ/20735525-5.3-2010 <gas filter>Character1 High filtering accuracy, large filter area, pressure loss ... , CNG stations and all kinds of gas equipment s gas purificationMediamanufactured coal gas, LPG, air, gas, town gas, natural gas and other non-corrosive gasRequirementThe installation, ...