COMPACT rotary lobe blowers up to 200 kW

Smart design, compact and ready for immediate use

Our COMPACT blowers are optionally available as a complete package with integrated electrical equipment. This ensures easy commissioning and maintenance as well as reliable and economical operation:

Space-saving blowers – complete with sound enclosure. Modular concept permits easy expansion (models BB C to FB C and HB 950 C)
Also suitable for nitrogen conveying applications (CN versions)
OFC and STC models as complete plug-and-play systems with integrated electrical controls and power supply: optionally available with a star-delta starter or variable speed control (STC and OFC versions)

Your advantages

Plug and play set-up saves time and money.
Blowers with integrated controls result in considerable savings for planning, installation, commissioning, data communication and certification.
Safe and reliable conveying, optimised 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 at the front and air connections are located at the rear.

Economical – thanks to low life cycle costs

Our comprehensive approach guarantees optimal return on investment: Outstanding energy efficiency and maximum compressed air availability combined with a rapid response global service and support network.

Kaeser life-cycle management

Product details

Equipment

Blower block

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

Drive motor

Brand-name product
IE3 high-efficiency motor
Three PTC thermistors as standard
Calibrated with OFC frequency controller for variable-speed systems
Easily accessible, central lubrication port for motors with regreasable 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 damping louvres over intake and exhaust openings
Absorption silencer minimises process air pulsation downstream from the blower block.
Low residual pulsation and therefore minimal sound transfer to downstream piping.

Power transmission

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

SIGMA CONTROL 2

SIGMA CONTROL 2 with blower-specific software
Display and RFID reader provide effective communication and enhanced security.
High flexibility and easy integration into management system through variable interfaces
SD card reader for quick and easy updates and logging of operating data

ACA aftercoolers

High-efficiency ACA aftercoolers specially developed by KAESER KOMPRESSOREN for operation with rotary lobe blowers
Reduction in blowing air temperature to max. 10 °C above ambient whilst maintaining optimum pressure with no cooling water required
Electrical connection can be implemented 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 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 shielding roof also provides protection against overheating through exposure to the sun.

Accessories: Start control (STC) and OFC frequency control

Start control (STC)

Installed in the control cabinet: a star-delta starter (with remote operation capability), a sound enclosure fan control, an operating hours counter and KAESER CONTROL (the interface to Kaeser's service facility).

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

Standard version

Model	BB 52 C	BB 69 C	BB 89 C
Max. pressure differential – Gauge pressure mbar	1,000	1,000	1,000
Max. usable flow rate m³/min	4.7	5.9	8.2
Max. pressure differential – Underpressure mbar	500	500	500
Max intake volume m³/min	4.7	5.9	8.3
Max. rated motor power kW	7.5	11	15
Connection diameter DN	50	65	65
Dimensions without sound enclosure W x D x H mm	785 x 635 x 940	890 x 660 x 960	890 x 660 x 960
Max. mass without sound enclosure kg	140	195	201
Dimensions with sound enclosure W x D x H mm	800 x 790 x 1,120	960 x 780 x 1,200	960 x 780 x 1,200
Max. mass with sound enclosure kg	210	325	331

Model	CB 111 C	CB 131 C	DB 166 C
Max. pressure differential – Gauge pressure mbar	800	1,000	1,000
Max. usable flow rate m³/min	8.8	12.3	15.6
Max. pressure differential – Underpressure mbar	400	500	500
Max intake volume m³/min	8.9	12.4	15.7
Max. rated motor power kW	18.5	30	37
Connection diameter DN	80	80	100
Dimensions without sound enclosure W x D x H mm	855 x 1,010 x 1,290	855 x 1,010 x 1,290	990 x 1,070 x 1,120
Max. mass without sound enclosure kg	263	302	432
Dimensions with sound enclosure W x D x H mm	990 x 1,160 x 1,290	990 x 1,160 x 1,290	1,110 x 1,160 x 1,290
Max. mass with sound enclosure kg	443	482	632

Model	DB 236 C	EB 291 C	EB 421 C
Max. pressure differential – Gauge pressure mbar	1,000	1,000	1,000
Max. usable flow rate m³/min	21.1	28.6	40.1
Max. pressure differential – Underpressure mbar	500	500	500
Max intake volume m³/min	22.3	28.8	40.4
Max. rated motor power kW	45	75	75
Connection diameter DN	100	150	150
Dimensions without sound enclosure W x D x H mm	990 x 1,070 x 1,120	1,240 x 1,370 x 1,510	1,240 x 1,370 x 1,510
Max. mass without sound enclosure kg	482	921	966
Dimensions with sound enclosure W x D x H mm	1,110 x 1,160 x 1,290	1,420 x 1,600 x 1,700	1,420 x 1,600 x 1,700
Max. mass with sound enclosure kg	682	1,261	1,306

Model	FB 441 C	FB 621 C	FB 791 C
Max. pressure differential – Gauge pressure mbar	1,000	1,000	800
Max. usable flow rate m³/min	41.3	58.5	71.3
Max. pressure differential – Underpressure mbar	500	500	450
Max intake volume m³/min	41.6	58.9	71.8
Max. rated motor power kW	90	132	110
Connection diameter DN	200	200	250
Dimensions without sound enclosure W x D x H mm	1,790 x 1,450 x 1,750	1,790 x 1,450 x 1,750	1,870 x 1,450 x 1,900
Max. mass without sound enclosure kg	1,450	1,965	1,717
Dimensions with sound enclosure W x D x H mm	1,920 x 1,620 x 1,910	1,920 x 1,620 x 1,910	1,920 x 1,620 x 2,090
Max. mass with sound enclosure kg	1,960	2,375	2,247

Model	HB 950 C
Max. pressure differential – Gauge pressure mbar	1,000
Max. usable flow rate m³/min	93.1
Max. pressure differential – Underpressure mbar	500
Max intake volume m³/min	91.65
Max. rated motor power kW	200
Connection diameter DN	250
Dimensions without sound enclosure W x D x H mm	1,700 x 1,700 x 1,950
Max. mass without sound enclosure kg	3,005
Dimensions with sound enclosure W x D x H mm	2,170 x 1,864 x 2,110
Max. mass with sound enclosure kg	3,805