COMPACT rotary lobe blowers up to 2603 cfm

Smart design, compact, and ready for immediate use

Our COMPACT blowers are optionally available as a complete package to ensure easy commissioning and maintenance as well as reliable operation:

  • Space-saving blowers complete with sound enclosure; modular design makes expansion easy (models BB C to FB C and HB 950 C)
  • Also suitable for nitrogen conveying applications (CN versions)
  • Complete plug-and-play systems with integrated package controls and power supply: optionally available with wye-delta start (STC) or variable speed control (OFC)

Your advantages

  • Plug and play operation saves time and money.
    Blowers with integrated controls result in considerable savings for planning, installation, commissioning, data communication, and certification.
  • Safe and reliable conveying, optimized for your needs:
    Our SIGMA CONTROL 2 controller not only makes complete systems more efficient, it also continually monitors and transmits performance and status data. The result: Maximum reliability and availability
  • Compact footprint thanks to intelligent enclosure design:
    COMPACT blower with sound enclosure. In the STC version, units can be installed side by side, as maintenance access is in the front and air connections are located in the back.
Economical – thanks to low life cycle costs
Life-cycle costs

Our comprehensive approach to life cycle cost management: Superior efficiency, easy operation, service-friendliness, and the latest in technology to keep performance high well into the future.

 

Product details

Equipment

Blower block

Rotary lobe blower packages with OMEGA profile

  • Robust and durable
  • Energy-efficient Omega Profile rotors
  • Wide control range

Drive motor

  • IE3 high-efficiency motor
  • Three PTC thermistors as standard
  • Calibrated with OFC frequency controller for variable speed systems
  • Easily accessible, central lubrication port to regrease motor bearings for fast and safe maintenance

Sound insulation

  • The system’s blower and motor cooling air is drawn in from outside the sound enclosure from the cooler ambient surroundings for maximum energy efficiency.
  • Effective sound-proofing provided by thick-walled lining with dense foam and dampening louvers over intake and exhaust openings
  • Absorption silencer minimizes process air pulsation downstream of the blower block
  • Low residual pulsation for minimal sound transfer to downstream piping.

Power transmission

  • High efficiency
  • V-belt guard for safe operation
  • Automatic belt tensioning for consistently high power transmission ratio
  • Belt tensioning device also serves as motor lifting device when changing the belt.

SIGMA CONTROL 2

SIGMA CONTROL 2 compressor controller
  • SIGMA CONTROL 2 with blower-specific software
  • Display and RFID reader provide effective communication and enhanced security.
  • Highly flexible and easily integrates into plant control / SCADA systems thanks to the multiple available interfaces
  • SD card reader for quick and easy updates and logging operating data

ACA aftercoolers

Aftercoolers for blowers
  • High efficiency ACA aftercoolers specially developed by KAESER for operation with rotary blowers
  • Reduction in blowing air temperature to max. 50 °F above ambient while maintaining optimum pressure with no cooling water required
  • Electrical connection directly in the blower control cabinet.
Innovative installation concept

To save space, multiple COMPACT blower units can be installed side by side.

  • All maintenance and installation work can be performed through the front or top of the unit.
  • All valves are mounted directly on the blower unit.
  • The pipe connections and cooling air apertures are located at the rear.

Station with DBC blowers and SIGMA AIR MANAGER

Accessible from the front: 

  • Belt tensioning device and tension indicator (two-section belt guard for larger units)
  • Intake filter inspection and change
  • Motor terminal strip
  • Oil drain and filling plug, oil level inspection

Outdoor installation - no problem!
Outdoor installation of KAESER blowers

Installing Kaeser blowers outdoors is simple and inexpensive. The specially designed shields to protect the air inlet apertures against heavy rain are equipped with a bird screen. A stainless steel roof cover also provides protection against overheating due to sun exposure.

Accessories: Start control (STC) and variable frequency control (OFC)

Start control (STC)

Start control (STC)

Control cabinet includes: wye-delta starter (with remote operation capability), sound enclosure fan control, operating hours counter, and KAESER CONTROL (the interface to Kaeser's service facility).

Variable frequency control (OFC)

OFC-type frequency control

Frequency control enables infinite blower speed adjustment and, with the addition of a pressure sensor, also enables pressure regulation. The control unit coordinates operation of the frequency controller and the blower unit. Flexibility is further enhanced by the supplied signal output / input and Profibus connections.

Technical specifications BBC - HBC

Standard version

ModelBB 52 C BB 69 C BB 89 C
Max. pressure differential – Gauge pressure psi 14.5 14.5 14.5
Max. usable flow rate cfm 166 208 290
Max. pressure differential – Underpressure psi 7.3 7.3 7.3
Max intake volume cfm 166 208 293
Max. rated motor power hp 10 15 20
Connection diameter DN 50 80 80
Dimensions without sound enclosure W x D x H in 30.9 x 25 x 37 35 x 26 x 37.8 35 x 26 x 37.8
Max. mass without sound enclosure lb 309 430 443
Dimensions with sound enclosure W x D x H in 31.5 x 31.1 x 44.1 37.8 x 30.7 x 47.2 37.8 x 30.7 x 47.2
Max. mass with sound enclosure lb 463 717 730

ModelCB 111 C CB 131 C DB 166 C
Max. pressure differential – Gauge pressure psi 11.6 14.5 14.5
Max. usable flow rate cfm 311 434 551
Max. pressure differential – Underpressure psi 5.8 7.3 7.3
Max intake volume cfm 314 438 554
Max. rated motor power hp 25 40 50
Connection diameter DN 80 80 100
Dimensions without sound enclosure W x D x H in 33.7 x 39.8 x 50.8 33.7 x 39.8 x 50.8 39 x 42.1 x 44.1
Max. mass without sound enclosure lb 580 666 952
Dimensions with sound enclosure W x D x H in 39 x 45.7 x 50.8 39 x 45.7 x 50.8 43.7 x 45.7 x 50.8
Max. mass with sound enclosure lb 977 1,063 1,393

ModelDB 236 C EB 291 C EB 421 C
Max. pressure differential – Gauge pressure psi 14.5 14.5 14.5
Max. usable flow rate cfm 745 1,010 1,416
Max. pressure differential – Underpressure psi 7.3 7.3 7.3
Max intake volume cfm 788 1,017 1,427
Max. rated motor power hp 60 100 100
Connection diameter DN 100 150 150
Dimensions without sound enclosure W x D x H in 39 x 42.1 x 44.1 48.8 x 53.9 x 59.4 48.8 x 53.9 x 59.4
Max. mass without sound enclosure lb 1,063 2,030 2,130
Dimensions with sound enclosure W x D x H in 43.7 x 45.7 x 50.8 55.9 x 63 x 66.9 55.9 x 63 x 66.9
Max. mass with sound enclosure lb 1,504 2,780 2,879

ModelFB 441 C FB 621 C FB 791 C
Max. pressure differential – Gauge pressure psi 14.5 14.5 11.6
Max. usable flow rate cfm 1,458 2,066 2,440
Max. pressure differential – Underpressure psi 7.3 7.3 6.5
Max intake volume cfm 1,469 2,080 2,536
Max. rated motor power hp 125 175 150
Connection diameter DN 200 200 250
Dimensions without sound enclosure W x D x H in 70.5 x 57.1 x 68.9 70.5 x 57.1 x 68.9 73.6 x 57.1 x 74.8
Max. mass without sound enclosure lb 3,197 4,332 3,785
Dimensions with sound enclosure W x D x H in 75.6 x 63.8 x 75.2 75.6 x 63.8 x 75.2 75.6 x 63.8 x 82.3
Max. mass with sound enclosure lb 4,321 5,236 4,954

ModelHB 950 C
Max. pressure differential – Gauge pressure psi 14.5
Max. usable flow rate cfm 3,288
Max. pressure differential – Underpressure psi 7.3
Max intake volume cfm 3,237
Max. rated motor power hp 250
Connection diameter DN 250
Dimensions without sound enclosure W x D x H in 66.9 x 66.9 x 76.8
Max. mass without sound enclosure lb 6,625
Dimensions with sound enclosure W x D x H in 85.4 x 73.4 x 83.1
Max. mass with sound enclosure lb 8,389

Technical specifications BBC - FBC (STC/OFC)

Standard version

ModelBB 69 C BB 89 C CB 111 C
Max. pressure differential – Gauge pressure psi 14.5 14.5 11.6
Max. usable flow rate cfm 208 290 311
Max. pressure differential – Underpressure psi 7.3 7.3 5.8
Max intake volume cfm 208 293 314
Max. rated motor power hp 20 20 25
Connection diameter DN 80 80 80
Dimensions with control cabinet and sound enclosure W x D x H in 47.6 x 37.8 x 47.2 47.6 x 37.8 x 47.2 60.2 x 45.3 x 50.8
Max. mass lb 1,003 1,016 1,285

ModelCB 131 C DB 166 C DB 236 C
Max. pressure differential – Gauge pressure psi 14.5 14.5 14.5
Max. usable flow rate cfm 434 551 780
Max. pressure differential – Underpressure psi 7.3 7.3 7.3
Max intake volume cfm 438 554 788
Max. rated motor power hp 40 50 60
Connection diameter DN 80 100 100
Dimensions with control cabinet and sound enclosure W x D x H in 60.2 x 45.3 x 50.8 60.2 x 45.3 x 50.8 61 x 45.3 x 50.8
Max. mass lb 1,415 1,768 1,812

ModelEB 291 C EB 421 C FB 441 C
Max. pressure differential – Gauge pressure psi 14.5 14.5 14.5
Max. usable flow rate cfm 1,010 1,416 1,458
Max. pressure differential – Underpressure psi 7.3 7.3 7.3
Max intake volume cfm 1,017 1,427 1,469
Max. rated motor power hp 100 100 125
Connection diameter DN 150 150 200
Dimensions with control cabinet and sound enclosure W x D x H in 76.2 x 63 x 66.9 76.2 x 63 x 66.9 87.8 x 75.6 x 75.2
Max. mass lb 3,441 3,541 5,128

ModelFB 621 C FB 791 C
Max. pressure differential – Gauge pressure psi 14.5 11.6
Max. usable flow rate cfm 2,066 2,518
Max. pressure differential – Underpressure psi 7.3 7.3
Max intake volume cfm 2,080 2,536
Max. rated motor power hp 175 150
Connection diameter DN 200 250
Dimensions with control cabinet and sound enclosure W x D x H in 87.8 x 75.6 x 75.2 87.8 x 75.6 x 82.3
Max. mass lb 6,259 5,602