Kaeser – Rotary screw compressors with 1:1 direct drive BSD

BSD Series Rotary Screw Compressors – Equipment

Complete unit

  • Ready-to-run
  • Fully automatic
  • Super silenced
  • Vibration-damped
  • All panels powder-coated
  • For ambient temperatures up to +45 °C

Sound insulation

  • Panels lined with laminated mineral wool

Vibration dampening

  • Anti-vibration mounts
  • Dual anti-vibration mount


  • Single stage with cooling fluid injection for optimal rotor cooling
  • Genuine KAESER screw compressor airend with energy-saving SIGMA Profile
  • 1:1 drive


  • Directly coupled without gearing
  • High-flex coupling

Electric motor


Super premium efficiency drive motor IE4 logo
  • Super premium efficiency IE4 motor
  • Premium quality German-made motor
  • IP 55
  • Insulation class F for greater power reserve
  • Pt100 winding temperature transducer for motor monitoring
  • Bearing lubrication from the outside

Electrical components

  • Control cabinet to IP 54
  • Control transformer
  • Siemens frequency converter
  • Volt-free contacts for ventilation control

Fluid and air flow

  • Dry air filter
  • Pneumatic inlet and venting valves
  • Cooling fluid reservoir with three-stage separator system
  • Pressure relief valve
  • Minimum pressure/check valve
  • ETM Electronic Thermal Management and eco fluid filter in coolant circuit
  • All fully piped
  • Flexible couplings

ETM Electronic Thermal Management ETM

  • Optionally available in water-cooled design with either plate-type or shell and tube heat exchanger

Refrigeration dryers

  • CFC-free
  • Contains fluorinated greenhouse gas R-513A
  • Fully insulated
  • Hermetically sealed refrigerant circuit
  • Scroll refrigerant compressor with energy-saving shut-down feature
  • Hot gas bypass control
  • Electronic condensate drain
  • Upstream centrifugal separator

Heat recovery (HR)

  • Optionally available with integrated heat recovery system (plate-type heat exchanger)


  • Traffic-light LEDs for at-a-glance operational status
  • Easy-to-read display
  • 30 selectable languages
  • Soft-touch icon buttons
  • Fully automatic monitoring and control
  • Dual, Quadro, Vario and Continuous control modes available as standard
  • Interfaces: Ethernet
  • Additional optional communication modules for: Profibus DP, Modbus, Profinet and DeviceNet
  • SD card slot for data logging and updates
  • RFID reader
  • Web server

Product PDF: Kaeser – BSD