43.10.00 Gas Handling Equipment
43.15.00 Process Air and Gas Filters
43.15.13 Blower Intake and Turbine Air Filters 43.15.13.13 Static Prefilters 43.15.13.16 Static Final Filters 43.15.13.19 Static HEPA Filters 43.15.13.23 Pulse Filters 43.15.33 Grease Filters 43.15.43 Mist Eliminators 43.15.63 High-temperature Air Filters 43.15.73 Multiple-application Air Filters 43.15.73.11 Air Filter Media 43.15.73.12 Permanent Washable Filters 43.15.73.13 Poly-ring Air Filters 43.15.73.15 Rigid Cell Filters 43.15.73.17 Automatic Roll-type Air Filters 43.15.76 Chemical Media for Air and Gas Filters