Breathing Air System

The Kaeser Breathing Air System (KBS) is a complete purification system. It is designed to remove contaminants such as moisture, solid particles, oil or oil vapors, carbon monoxide, and hydrocarbons from normal compressed air. The KBS meets all quality requirements and international standards such as OSHA, CSA, ISO 12021, and DIN 3188. The KBS employs five treatment stages: Prefilter removes fluid droplets, dust, dirt, rust, oil, and other particles larger than 1 µm. The filter includes an electronic condensate drain. Microfilter removes particles and aerosols down to 0.01 µm. The filter also includes an electronic condensate drain. A heatless regenerating desiccant dryer removes water vapor and carbon dioxide, drying the air to a pressure dew point of -40°F. Catalytic converter removes carbon monoxide. Activated carbon filter removes hydrocarbon vapors and brings breathing air to legal requirements.

Additional information

Product Type


Rated CFM

18-1130 CFM


  • Left and right tower pressure gauges
  • Purge pressure gauge
  • Inlet pressure gauge
  • Color change moisture indicator
  • NEMA 4/4X with critical LED indicators
  • Soft on/off switch with 2 power recovery modes
  • Switching failure alarms
  • Coalescing filters with automatic drain valves and differential pressure gauges
  • CO catalyst converter
  • Particulate afterfilter with differential pressure gauge
  • Activated carbon filter
  • Air sample ports for optional analyzer installation

Product Brochure



ModelRated Capacity (scfm)Outle Flow (scfm)Power Supply (V/Ph/Hz)Inlet/Outlet Conn (in)Dimensions (in)Weight (lb)
KBS 15181585-264/1/47-63 AC1/2 NPT (F)42 x 38 x 49440
KBS 25302585-264/1/47-63 AC1/2 NPT (F)42 x 38 x 49450
KBS 35423585-264/1/47-63 AC1 NPT (F)42 x 38 x 49455
KBS 50605085-264/1/47-63 AC1 NPT (F)42 x 38 x 64560
KBS 75907585-264/1/47-63 AC1 NPT (F)42 x 38 x 81700
KBS 951149585-264/1/47-63 AC1 NPT (F)49 x 45 x 56820
KBS 13516213585-264/1/47-63 AC1 NPT (F)49 x 45 x 56820
KBS 20524620585-264/1/47-63 AC2 NPT (F)58 x 47 x 751185
KBS 30536630585-264/1/47-63 AC2 NPT (F)64 x 52 x 661405
KBS 37545037585-264/1/47-63 AC2 NPT (F)64 x 52 x 741560
KBS 49059049085-264/1/47-63 AC2 NPT (F)57 7/16 x 69½ x 102 13/161650
KBS 62575062585-264/1/47-63 AC2 NPT (F)6 23/16 x 75 x 1072800
KBS 77593077585-264/1/47-63 AC3 FLG62 x 85 x 1111 3/163275
KBS 940113094085-264/1/47-63 AC3 FLG65 7/8 x 8 15/16 x 1153750