Oil-free compression rotary screw compressors with air-cooling


Dependable performance – up to +45°C ambient temperature

In the absence of a cooling-water infrastructure, air-cooled, oil-free compression rotary screw compressors ensure exceptional compressed air supply dependability – even in ambient temperatures up to +45°C. There’s also plenty of power: thanks to innovative and intelligent system design, we can provide air-cooled, oil-free compression rotary screw compressors up to 355 kW.

  • Flow rate from 4.2 to 51 m³/min
  • Pressure from 4 to 11 bar

Your benefits

  • Heat-use made simple:
    Thanks to radial fans with high residual thrust, the heated cooling air can normally be used straight away for space heating without need of auxiliary fans.
  • Energy-efficient in every detail:
    In standby mode, the temperature-controlled Kaeser standstill fan reliably conveys residual heat away – meaning the main fan can be switched off!
  • Exceptionally maintenance-friendly:
    The first and second stages of the aluminium-block heat exchanger can simply be swivelled out for cleaning purposes.

Highlights of our air-cooled CSG series

Water jacket-cooling

Water jacket-cooling for enhanced efficiency.

The effective water jacket-cooling achieves an efficiency increase of several percentage points in comparison to oil jacket-cooling. Moreover, the service life of the gear oil is increased to 18,000 operating hours.

Variable cooling air flow rate

Innovative fan system ensures demand-based cooling-air flow.

Thanks to the innovative fan system, cooling air flow is regulated as needed. This enables optimal adjustment to the corresponding load situation and cooling air temperature.

 

Air-cooled, oil-free compression rotary screw compressors in detail

Energy efficiency is paramount
Save with KAESER life-cycle management

The purchase price and service costs account for just a fraction of the total lifetime cost of a compressor. Energy accounts for the lion's share of the system’s costs. As a leading compressed air systems provider, we offer individual planning tailored to your exact needs, an energy-efficient compressed air station and reliable service. We are there to partner you throughout the entire service life of your compressed air station.

Efficient and reliable operation
SIGMA CONTROL 2 compressor controller

The integrated SIGMA CONTROL 2 controller coordinates compressed air generation and ensures efficient, reliable machine operation. Moreover, it guarantees perfect interaction within the integrated system as a whole. All relevant components and operating states are monitored and evaluated. A multitude of communications functions are available to the operator, including the option of connecting the machine to other control technology (SCADA).

Quality in detail

Fibre-free pulse dampers

Fibre-free pulsation dampers

Kaeser's new fibre-free pulse dampers keep pressure losses to an absolute minimum, help maintain consistent air quality and, unlike fibre versions, do not present a source of contamination for the compressed air.

Highly efficient condensate separator

High-efficiency condensate separator

Thanks to its flow-optimised design, the newly developed condensate separator reliably separates the condensate downstream from the air coolers, with minimal pressure loss.

Options

Bolt-down machine mounts

  • Machine mounts to bolt the machine to the floor

Silencer for air inlet opening

  • Damping louvres in front of heat exchangers

Cooling air filter mats

  • Cooling air filter mats in the inlet area of the compressor
  • Reduce soiling of heat exchanger surfaces and inlet air filters

Hot air connection

  • Direct use of the hot compressed air, e.g. for heat regenerating desiccant dryer or as hot process air
  • With certain models, the desired hot air temperature can be controlled in ranges.
Technical specifications CSG A

Standard version

ModelCSG 60 A CSG 75 A CSG 95 A
Working pressure bar 6 8.6 11 6 8.6 11 6 8.6 11
Flow rate complete system at working pressure m³/min 6.81 5.6 4.72 8.24 7.11 6.11 9.91 8.78 7.47
Max. positive pressure bar 6 8.6 11 6 8.6 11 6 8.6 11
Nominal motor output kW 37 45 55
Dimensions
W x D x H mm 		2,200 x 1,530 x 2,125 2,200 x 1,530 x 2,125 2,200 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN DN65 PN16 DIN DN65 PN16 DIN
Sound pressure level dB(A) 69 69 70
Weight kg 2,500 2,550 2,550

ModelCSG 125 A CSG 150 A
Working pressure bar 6 8.6 11 6 8.6 11
Flow rate complete system at working pressure m³/min 13.36 12.27 11.32 15.1 14.53 13.45
Max. positive pressure bar 6 8.6 11 6 8.6 11
Nominal motor output kW 75 90
Dimensions
W x D x H mm 		2,200 x 1,530 x 2,125 2,200 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN DN65 PN16 DIN
Sound pressure level dB(A) 71 72
Weight kg 2,550 2,800

T version

ModelCSG 60 T A CSG 75 T A CSG 95 T A
Working pressure bar 6 8.6 11 6 8.6 11 6 8.6 11
Flow rate complete system at working pressure m³/min 6.8 5.59 4.71 8.22 7.1 6.1 9.88 8.77 7.46
Max. positive pressure bar 6 8.6 11 6 8.6 11 6 8.6 11
Nominal motor output kW 37 45 55
Pressure dew point °C 3 3 3
Refrigeration dryerABT 150 ABT 150 ABT 150
Dimensions
W x D x H mm 		2,580 x 1,530 x 2,125 2,580 x 1,530 x 2,125 2,580 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN DN65 PN16 DIN DN65 PN16 DIN
Sound pressure level dB(A) 69 69 70
Weight kg 2,700 2,750 2,750

ModelCSG 125 T A CSG 150 T A
Working pressure bar 6 8.6 11 8.6 11
Flow rate complete system at working pressure m³/min 13.33 12.24 11.3 14.51 13.43
Max. positive pressure bar 6 8.6 11 8.6 11
Nominal motor output kW 75 90
Pressure dew point °C 3 3
Refrigeration dryerABT 150 ABT 150
Dimensions
W x D x H mm 		2,580 x 1,530 x 2,125 2,580 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN DN65 PN16 DIN
Sound pressure level dB(A) 71 72
Weight kg 2,750 3,000

SFC version

ModelCSG 75 SFC A CSG 95 SFC A CSG 125 SFC A
Working pressure bar 6 8.6 6 8.6 11 6 8.6 11
Flow rate complete system at working pressure m³/min 4.04 - 8.27 4.02 - 6.98 4.75 - 9.79 4.73 - 8.71 4.71 - 7.82 5.25 - 13.32 5.22 - 11.9 4.93 - 10.58
Max. positive pressure bar 8.6 8.6 11 8.6 11
Nominal motor output kW 55 55 75 75
Dimensions
W x D x H mm 		2,200 x 1,530 x 2,125 2,200 x 1,530 x 2,125 2,200 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN DN65 PN16 DIN DN65 PN16 DIN
Sound pressure level dB(A) 70 71 72
Weight kg 2,500 2,500 2,550 2,550

ModelCSG 150 SFC A
Working pressure bar 6 8.6 11
Flow rate complete system at working pressure m³/min 5.25 - 16.04 5.22 - 14.47 5.2 - 13.25
Max. positive pressure bar 6 11
Nominal motor output kW 90
Dimensions
W x D x H mm 		2,200 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN
Sound pressure level dB(A) 73
Weight kg 2,600

T-SFC version

ModelCSG 75 T SFC A CSG 95 T SFC A CSG 125 T SFC A
Working pressure bar 6 8.6 6 8.6 11 6 8.6 11
Flow rate complete system at working pressure m³/min 4.04 - 8.22 4.01 - 6.96 4.74 - 9.77 4.72 - 8.68 4.71 - 7.79 5.24 - 13.2 5.22 - 11.84 4.93 - 10.54
Max. positive pressure bar 8.6 8.6 11 8.6 11
Nominal motor output kW 55 55 75 75
Pressure dew point °C 3 3 3
Refrigeration dryerABT 150 ABT 150 ABT 150
Dimensions
W x D x H mm 		2,580 x 1,530 x 2,125 2,580 x 1,530 x 2,125 2,580 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN DN65 PN16 DIN DN65 PN16 DIN
Sound pressure level dB(A) 70 71 72
Weight kg 2,700 2,700 2,750 2,750

ModelCSG 150 T SFC A
Working pressure bar 8.6 11
Flow rate complete system at working pressure m³/min 5.22 - 14.37 5.2 - 13.19
Max. positive pressure bar 11
Nominal motor output kW 90
Pressure dew point °C 3
Refrigeration dryerABT 150
Dimensions
W x D x H mm 		2,580 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN
Sound pressure level dB(A) 73
Weight kg 2,800

RD version

ModelCSG 60 i.HOC A CSG 75 i.HOC A CSG 95 i.HOC A
Working pressure bar 6 8.6 11 6 8.6 11 6 8.6 11
Flow rate complete system at working pressure m³/min 6.81 5.6 4.72 8.24 7.11 6.11 9.91 8.78 7.47
Max. positive pressure bar 6 8.6 11 6 8.6 11 6 8.6 11
Nominal motor output kW 37 45 55
Pressure dew point °C - - -
Dimensions
W x D x H mm 		2,900 x 1,530 x 2,125 2,900 x 1,530 x 2,125 2,900 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN DN65 PN16 DIN DN65 PN16 DIN
Sound pressure level dB(A) 69 69 70
Weight kg 3,200 3,250 3,250

ModelCSG 125 i.HOC A CSG 150 i.HOC A
Working pressure bar 6 8.6 11 6 8.6 11
Flow rate complete system at working pressure m³/min 13.36 12.27 11.32 15.1 14.53 13.45
Max. positive pressure bar 6 8.6 11 6 8.6 11
Nominal motor output kW 75 90
Pressure dew point °C - -
Dimensions
W x D x H mm 		2,900 x 1,530 x 2,125 2,900 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN DN65 PN16 DIN
Sound pressure level dB(A) 71 72
Weight kg 3,250 3,500

RD SFC version

ModelCSG 75 i.HOC SFC A CSG 95 i.HOC SFC A CSG 125 i.HOC SFC A
Working pressure bar 6 8.6 6 8.6 11 6 8.6 11
Flow rate complete system at working pressure m³/min 4.04 - 8.29 4.02 - 6.99 4.75 - 9.79 4.73 - 8.71 4.71 - 7.82 5.25 - 13.32 5.22 - 11.9 4.93 - 10.58
Max. positive pressure bar 8.6 8.6 11 8.6 11
Nominal motor output kW 55 55 75 75
Pressure dew point °C - - -
Dimensions
W x D x H mm 		2,900 x 1,530 x 2,125 2,900 x 1,530 x 2,125 2,900 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN DN65 PN16 DIN DN65 PN16 DIN
Sound pressure level dB(A) 70 71 72
Weight kg 3,200 3,200 3,250 3,250

ModelCSG 150 i.HOC SFC A
Working pressure bar 6 8.6 11
Flow rate complete system at working pressure m³/min 5.25 - 16.04 5.22 - 14.5 5.2 - 13.25
Max. positive pressure bar 6 11
Nominal motor output kW 90
Pressure dew point °C -
Dimensions
W x D x H mm 		2,900 x 1,530 x 2,125
Compressed air connectionDN65 PN16 DIN
Sound pressure level dB(A) 73
Weight kg 3,300

Add-on refrigeration dryer

ModelABT 130 ABT 150
Power consumption kW 1.38 1.35
Pressure dew point °C 3 3
RefrigerantR-513A R-513A
Global warming potential631 631
Refrigerant volume kg 1.5 1.1
Refrigerant mass as CO2 equivalent t 0.9 0.69
Hermetic refrigeration circuit- -

Technical specifications DSG-2 A

Standard version

ModelDSG 140-2 A DSG 180-2 A DSG 220-2 A
Working pressure bar 8 10 4 6 8 10 4 6 8 10
Flow rate complete system at working pressure m³/min 13.18 13.12 21.7 19.2 18.4 16.1 26.15 23 21.6 19.1
Max. positive pressure bar 8 10 4 6 8 10 4 6 8 10
Nominal motor output kW 90 110 132
Dimensions
W x D x H mm 		3,435 x 1,750 x 2,385 3,435 x 1,750 x 2,385 3,435 x 1,750 x 2,385
Compressed air connectionDN80 PN16 DIN DN80 PN16 DIN DN80 PN16 DIN
Sound pressure level dB(A) 77 78 78
Weight kg 3,400 3,550 3,650

ModelDSG 260-2 A DSG 290-2 A
Working pressure bar 4 6 8 10 6 8 10
Flow rate complete system at working pressure m³/min 28.61 26.1 26 22.9 28.55 28.5 26
Max. positive pressure bar 4 8 10 8 10
Nominal motor output kW 160 200
Dimensions
W x D x H mm 		3,435 x 1,750 x 2,385 3,435 x 1,750 x 2,385
Compressed air connectionDN80 PN16 DIN DN80 PN16 DIN
Sound pressure level dB(A) 79 81
Weight kg 3,800 4,000

SFC version

ModelDSG 180-2 SFC A DSG 220-2 SFC A DSG 260-2 SFC A
Working pressure bar 4 6 8 10 4 6 8 10 4 6 8 10
Flow rate complete system at working pressure m³/min 8.58 - 22.52 9.46 - 20.79 8.51 - 18.56 9.54 - 16.43 7.84 - 22.51 8.68 - 22.45 9.51 - 21.8 9.95 - 19.5 8.59 - 27.71 9.36 - 27.66 9.62 - 25.44 10.3 - 23.3
Max. positive pressure bar 6 10 8.5 10 7 10
Nominal motor output kW 110 132 160
Dimensions
W x D x H mm 		3,435 x 1,750 x 2,385 3,435 x 1,750 x 2,385 3,435 x 1,750 x 2,385
Compressed air connectionDN80 PN16 DIN DN80 PN16 DIN DN80 PN16 DIN
Sound pressure level dB(A) 79 79 80
Weight kg 4,150 4,250 4,400

ModelDSG 290-2 SFC A
Working pressure bar 4 6 8 10
Flow rate complete system at working pressure m³/min 9.07 - 30.09 10.27 - 30.05 11.47 - 30 12.33 - 28
Max. positive pressure bar 8.5 10
Nominal motor output kW 200
Dimensions
W x D x H mm 		3,435 x 1,750 x 2,385
Compressed air connectionDN80 PN16 DIN
Sound pressure level dB(A) 82
Weight kg 4,600

RD version

ModelDSG 140-2 i.HOC A DSG 180-2 i.HOC A DSG 220-2 i.HOC A
Working pressure bar 8 10 6 8 10 6 8 10
Flow rate complete system at working pressure m³/min 13.18 13.12 19.2 18.4 16.1 23 21.6 19.1
Max. positive pressure bar 8 10 6 8 10 6 8 10
Nominal motor output kW 90 110 132
Pressure dew point °C -34 -36 -26 -33 -36 -26 -33 -35
Dimensions
W x D x H mm 		4,270 x 1,750 x 2,385 4,270 x 1,750 x 2,385 4,270 x 1,750 x 2,385
Compressed air connectionDN80 PN16 DIN DN80 PN16 DIN DN80 PN16 DIN
Sound pressure level dB(A) 77 78 78
Weight kg 4,500 4,650 4,750

ModelDSG 260-2 i.HOC A DSG 290-2 i.HOC A
Working pressure bar 6 8 10 6 8 10
Flow rate complete system at working pressure m³/min 26.1 26 22.9 28.55 28.5 26
Max. positive pressure bar 8 10 8 10
Nominal motor output kW 160 200
Pressure dew point °C -25 -32 -34 -24 -31 -33
Dimensions
W x D x H mm 		4,270 x 1,750 x 2,385 4,270 x 1,750 x 2,385
Compressed air connectionDN80 PN16 DIN DN80 PN16 DIN
Sound pressure level dB(A) 79 81
Weight kg 4,900 5,100

RD SFC version

ModelDSG 180-2 i.HOC SFC A DSG 220-2 i.HOC SFC A DSG 260-2 i.HOC SFC A
Working pressure bar 6 8 10 6 8 10 6 8 10
Flow rate complete system at working pressure m³/min 9.46 - 20.79 8.51 - 18.56 9.54 - 16.43 8.68 - 22.45 9.51 - 21.8 9.95 - 19.5 9.36 - 27.66 9.62 - 25.44 10.3 - 23.3
Max. positive pressure bar 6 10 8.5 10 7 10
Nominal motor output kW 110 132 160
Pressure dew point °C -26 -33 -36 -26 -32 -35 -25 -31 -34
Dimensions
W x D x H mm 		4,270 x 1,750 x 2,385 4,270 x 1,750 x 2,385 4,270 x 1,750 x 2,385
Compressed air connectionDN80 PN16 DIN DN80 PN16 DIN DN80 PN16 DIN
Sound pressure level dB(A) 79 79 80
Weight kg 5,250 5,350 5,500

ModelDSG 290-2 i.HOC SFC A
Working pressure bar 6 8 10
Flow rate complete system at working pressure m³/min 10.27 - 30.05 11.47 - 30 12.33 - 28
Max. positive pressure bar 8.5 10
Nominal motor output kW 200
Pressure dew point °C -24 -30 -33
Dimensions
W x D x H mm 		4,270 x 1,750 x 2,385
Compressed air connectionDN80 PN16 DIN
Sound pressure level dB(A) 82
Weight kg 5,700

Technical specifications FSG-2 A

Standard version

ModelFSG 300-2 A FSG 350-2 A FSG 420-2 A
Working pressure bar 4 6 8 4 6 8 10 4 6 8 10
Flow rate complete system at working pressure m³/min 35.12 29.4 29.3 42.15 37.3 34.9 29.2 50.14 45.7 42 37.1
Max. positive pressure bar 4 8 4 6 8 10 4 6 8 10
Nominal motor output kW 160 200 250
Dimensions
W x D x H mm 		3,860 x 2,075 x 2,730 3,860 x 2,075 x 2,730 3,860 x 2,075 x 2,730
Compressed air connectionDN150 PN16 DIN DN150 PN16 DIN DN150 PN16 DIN
Sound pressure level dB(A) 78 78 80
Weight kg 5,550 5,750 5,950

ModelFSG 450-2 A FSG 500-2 A
Working pressure bar 6 8 10 8 10
Flow rate complete system at working pressure m³/min 50.1 45.6 41.9 50 45.6
Max. positive pressure bar 6 8 10 8 10
Nominal motor output kW 315 315
Dimensions
W x D x H mm 		3,860 x 2,075 x 2,730 3,860 x 2,075 x 2,730
Compressed air connectionDN150 PN16 DIN DN150 PN16 DIN
Sound pressure level dB(A) 81 82
Weight kg 6,250 6,250

SFC version

ModelFSG 420-2 SFC A FSG 500-2 SFC A FSG 520-2 SFC A
Working pressure bar 4 6 8 10 4 6 8 10 4 6 8 10
Flow rate complete system at working pressure m³/min 12.95 - 45.84 14.79 - 42.18 16.63 - 38.52 18.48 - 34.85 15.48 - 50.77 16.94 - 48.66 18.41 - 44.93 19.88 - 41.21 15.48 - 50.77 16.94 - 50.7 18.4 - 50.63 19.88 - 48.59
Max. positive pressure bar 10 10 10
Nominal motor output kW 250 315 355
Dimensions
W x D x H mm 		3,860 x 2,075 x 2,730 3,860 x 2,075 x 2,730 3,860 x 2,075 x 2,730
Compressed air connectionDN150 PN16 DIN DN150 PN16 DIN DN150 PN16 DIN
Sound pressure level dB(A) 81 83 84
Weight kg 6,550 7,000 7,600

RD version

ModelFSG 300-2 i.HOC A FSG 350-2 i.HOC A FSG 420-2 i.HOC A
Working pressure bar 6 8 6 8 10 6 8 10
Flow rate complete system at working pressure m³/min 29.4 29.3 37.3 34.9 29.2 45.7 42 37.1
Max. positive pressure bar 8 6 8 10 6 8 10
Nominal motor output kW 160 200 250
Pressure dew point °C -22 -31 -20 -29 -34 -19 -28 -32
Dimensions
W x D x H mm 		4,630 x 2,075 x 2,730 4,630 x 2,075 x 2,730 4,630 x 2,075 x 2,730
Compressed air connectionDN150 PN16 DIN DN150 PN16 DIN DN150 PN16 DIN
Sound pressure level dB(A) 78 78 80
Weight kg 6,750 6,950 7,150

ModelFSG 450-2 i.HOC A FSG 500-2 i.HOC A
Working pressure bar 8 10 8 10
Flow rate complete system at working pressure m³/min 45.6 41.9 50 45.6
Max. positive pressure bar 8 10 8 10
Nominal motor output kW 315 315
Pressure dew point °C -27 -31 -26 -30
Dimensions
W x D x H mm 		4,630 x 2,075 x 2,730 4,630 x 2,075 x 2,730
Compressed air connectionDN150 PN16 DIN DN150 PN16 DIN
Sound pressure level dB(A) 81 82
Weight kg 7,450 7,450

RD SFC version

ModelFSG 420-2 i.HOC SFC A FSG 500-2 i.HOC SFC A FSG 520-2 i.HOC SFC A
Working pressure bar 6 8 10 6 8 10 6 8 10
Flow rate complete system at working pressure m³/min 14.79 - 42.18 16.63 - 38.52 18.48 - 34.85 16.94 - 48.66 18.41 - 44.93 19.88 - 41.21 16.94 - 50.7 18.4 - 50.63 19.88 - 48.59
Max. positive pressure bar 10 10 10
Nominal motor output kW 250 315 355
Pressure dew point °C -22 -28 -32 -18 -26 -31 -21 -26 -29
Dimensions
W x D x H mm 		4,630 x 2,075 x 2,730 4,630 x 2,075 x 2,730 4,630 x 2,075 x 2,730
Compressed air connectionDN150 PN16 DIN DN150 PN16 DIN DN150 PN16 DIN
Sound pressure level dB(A) 81 83 84
Weight kg 7,750 8,200 8,800

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