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 A T CSG 75 A T CSG 95 A T
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 A T CSG 150 A T
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 A SFC CSG 95 A SFC CSG 125 A SFC
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 A SFC
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 8,6 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 A SFC T CSG 95 A SFC T CSG 125 A SFC T
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 A SFC T
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 8,6 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 A i.HOC CSG 75 A i.HOC CSG 95 A i.HOC
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 A i.HOC CSG 150 A i.HOC
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 A SFC i.HOC CSG 95 A SFC i.HOC CSG 125 A SFC i.HOC
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 A SFC i.HOC
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 8,6 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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