Mid-sized rotary screw compressors from 25 to 125 hp


Energy-efficient rotary screw compressors – Design is in the details

For us, a compressed air supply using rotary screw compressors represents the centerpiece of your production process. Our ASD, BSD, and CSD series ensure a dependable compressed air supply for your processes with unprecedented levels of efficiency. 

These systems are perfect team players that can be integrated into existing control systems via the SIGMA AIR MANAGER 4.0. To ensure that you achieve the exact compressed air supply you require, our rotary screw compressors are available in different variants:

  • Base model
  • with refrigeration dryer for high compressed air quality: T model
  • with variable-speed drive for optimum efficiency and a broad control range: SFC model
  • with synchronous reluctance motor: Significantly greater efficiency – especially in the partial load range – than comparable asynchronous systems enables considerable energy savings.
  • Complete systems with integrated refrigerated dryer and variable-speed drive: T SFC models 
Our experts will be glad to assist you in selecting the right model for your needs.

Your benefits

  • Energy savings:
    Fixed-speed systems with asynchronous motors which meet the IE4 efficiency class. Frequency-controlled rotary screw compressors are equipped with IE5 motors and meet the IES2 system efficiency class.
  • Longer service life:
    Electronic Thermo Management dynamically controls the fluid temperature on compressors from the ASD, BSD, and CSD series. This not only saves additional energy, but also reliably prevents condensate formation and the associated moisture damage.
  • Heat recovery:
    Our rotary screw compressors convert 100% of the electrical drive energy supplied to them into heat energy. 96% of this energy remains available for heat recovery. Use this potential to your advantage!

CSD – Power converted into efficiency

CSD/CSDX rotary screw compressor

The new generation of oil-injected rotary screw compressors from Kaeser’s CSD series now delivers performance with even greater precision and efficiency. The integrated package consisting of motor, timing gears and airend permits the most energy-efficient airend speed to be selected for each operating point. The installed Electronic Thermal Management (ETM) and newly-designed inlet valve, together with the larger inlet filter, significantly enhance rotary screw compressor efficiency. The speed-controlled fan ensures further energy savings and a reduced CO2 footprint, since it only delivers as much cooling air as is actually required.

Pressure ranges for the CSD screw compressor series.
Six pressure variants significantly increase flow rate and, most importantly, enable precision adjustment to your individual pressure requirements.

For even greater energy efficiency, KAESER always selects the most efficient drive possible. Fixed-speed systems are equipped with asynchronous motors, which meet the best possible efficiency class of IE4 for this type of drive. Frequency-controlled SFC systems use IE5 motors and also meet the requirements for IES2 system efficiency, thereby achieving the highest possible efficiency rating in accordance with the European standard IEC 61800-9.

 

Our rotary screw compressors up to 125 hp in detail:

Safely avoid condensation
Electronic Thermo Management to prevention condensate formation.

Electronic Thermo Management (ETM) enables the SIGMA CONTROL 2 compressor controller to reliably prevent condensate formation. Thanks to the speed-controlled fan unit, the SIGMA CONTROL 2 can also adjust the CSD’s cooling air flow in accordance with ambient conditions. This means that fan speed can be reduced at low temperatures or during partial load operation, thereby consuming significantly less energy.

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).

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.

High compressed air quality with low energy consumption
CSD rotary screw compressor with add-on dryer.

Do you wish to protect your compressed air network from pipe corrosion, equipment failures, and product damage? Then an add-on dryer for ASD, BSD, and CSD series rotary screw compressors is just what you need.    

The robust and compact design of the refrigerated dryer allows for reduced refrigerant volume and therefore the CO2 equivalent. Its energy-saving control only allows operation when compressed air is flowing through the unit. This ensures application-appropriate compressed air quality with highest possible efficiency.

Technical specifications ASD

Standard version

Model Working pressure psi Flow rate complete system at working pressure acfm Max. positive pressure psi Nominal motor output hp Dimensions
W x D x H in 		Compressed air connection Sound pressure level dB(A) Weight lb
ASD 25 125 112 125 25 58 x 35 x 60 1¼ NPT 66 1,345
ASD 30 125 132 125 30 58 x 35 x 60 1¼ NPT 67 1,369
145 111 175
175 110
ASD 40S 125 162 125 40 58 x 35 x 60 1¼ NPT 67 1,574
145 130 175 1,499
175 127
217 106 217
ASD 40 125 191 125 40 58 x 35 x 60 1¼ NPT 69 1,570
145 161 175 1,574
175 159
217 123 217 1,499

T version

Model Working pressure psi Flow rate complete system at working pressure acfm Max. positive pressure psi Nominal motor output hp Refrigerated dryer Dimensions
W x D x H in 		Compressed air connection Sound pressure level dB(A) Weight lb
ASD 25 T 125 112 125 25 ABT 60 70 x 35 x 60 1¼ NPT 66 1,554
ASD 30 T 125 132 125 30 ABT 60 70 x 35 x 60 1¼ NPT 67 1,579
145 111 175
175 110
ASD 40S T 125 162 125 40 ABT 60 70 x 35 x 60 1¼ NPT 67 1,784
145 130 175 1,709
175 127
217 106 217
ASD 40 T 125 191 125 40 ABT 60 70 x 35 x 60 1¼ NPT 69 1,779
145 161 175 1,784
175 159
217 123 217 1,709

Add-on refrigerated dryer

Model Power consumption Pressure dew point °F Refrigerant Global warming potential — Refrigerant volume lb Refrigerant mass as CO2 equivalent t Hermetic refrigeration circuit
ABT 60 1.3 37 R-513A 631 1.65 0.5 -

Technical specifications BSD

Standard version

Model Working pressure psi Flow rate complete system at working pressure acfm Max. positive pressure psi Nominal motor output hp Dimensions
W x D x H in 		Compressed air connection Sound pressure level dB(A) Weight lb
BSD 40 125 193 125 40 63 x 41 x 67 1½ NPT 72 2,072
175 161 175
BSD 50 125 236 125 50 63 x 41 x 67 1½ NPT 72 2,172
175 190 175 2,105
217 157 217
BSD 60 125 288 125 60 63 x 41 x 67 1½ NPT 73 2,238
175 231 175
217 185 217 2,172

T version

Model Working pressure psi Flow rate complete system at working pressure acfm Max. positive pressure psi Nominal motor output hp Refrigerated dryer Dimensions
W x D x H in 		Compressed air connection Sound pressure level dB(A) Weight lb
BSD 40 T 125 193 125 40 ABT 83 78 x 41 x 67 1½ NPT 72 2,359
175 161 175
BSD 50 T 125 236 125 50 ABT 83 78 x 41 x 67 1½ NPT 72 2,458
175 190 175 2,392
217 157 217
BSD 60 T 125 288 125 60 ABT 83 78 x 41 x 67 1½ NPT 73 2,524
175 231 175
217 185 217 2,458

Add-on refrigerated dryer

Model Power consumption Pressure dew point °F Refrigerant Global warming potential — Refrigerant volume lb Refrigerant mass as CO2 equivalent t Hermetic refrigeration circuit
ABT 83 1.5 37 R-513A 631 2.43 0.7 -

Technical specifications CSD

Standard version

Model Working pressure psi Flow rate complete system at working pressure acfm Max. positive pressure psi Nominal motor output hp Dimensions
W x D x H in 		Compressed air connection Sound pressure level dB(A) Weight lb
CSD 90 100 337 100 60 71 x 43 x 75 2 NPT 69 2,954
110 325 110 67
125 300 125
150 271 150
175 255 175
CSD 110 100 404 100 75 71 x 43 x 75 2 NPT 69 3,109
110 392 110
125 376 125
150 332 150 70
175 305 175
217 261 217
CSD 130 100 518 100 100 71 x 43 x 75 2 NPT 74 3,527
110 498 110 72
125 459 125 3,307
150 425 150
175 367 175 71
217 307 217 70

T version

Model Working pressure psi Flow rate complete system at working pressure acfm Max. positive pressure psi Nominal motor output hp Refrigerated dryer Dimensions
W x D x H in 		Compressed air connection Sound pressure level dB(A) Weight lb
CSD 90 T 100 337 100 60 ABT 105 87 x 43 x 75 2 NPT 69 3,395
110 325 110 67
125 300 125
150 271 150
175 255 175
CSD 110 T 100 404 100 75 ABT 105 87 x 43 x 75 2 NPT 69 3,549
110 392 110
125 376 125
150 332 150 70
175 305 175
217 261 217
CSD 130 T 100 518 100 100 ABT 125 87 x 43 x 75 2 NPT 74 3,968
110 498 110 72
125 459 125 3,748
150 425 150
175 367 175 71
217 307 217 70

Add-on refrigerated dryer

Model Power consumption Pressure dew point °F Refrigerant Global warming potential — Refrigerant volume lb Refrigerant mass as CO2 equivalent t Hermetic refrigeration circuit
ABT 105 1.5 37 R-513A 631 3.2 0.9 -
ABT 125 2.1 37 R-513A 631 3.64 1 -

Technical specifications CSD

Standard version

Model Working pressure psi Flow rate complete system at working pressure acfm Max. positive pressure psi Nominal motor output hp Dimensions
W x D x H in 		Compressed air connection Sound pressure level dB(A) Weight lb
CSD 145 100 584 100 100 83 x 50 x 77 72 4,167
110 562 110
125 542 125
150 472 150 73
175 445 175 3,946
CSD 175 100 689 100 125 83 x 50 x 77 76 4,475
110 664 110 74
125 593 125 73
150 567 150
175 508 175
217 447 217 4,255

T version

Model Working pressure psi Flow rate complete system at working pressure acfm Max. positive pressure psi Nominal motor output hp Refrigerated dryer Dimensions
W x D x H in 		Compressed air connection Sound pressure level dB(A) Weight lb
CSD 145 T 100 584 100 100 ABT 165 99 x 50 x 77 72 4,784
110 562 110
125 542 125
150 472 150 73
175 445 175 4,564
CSD 175 T 100 689 100 125 ABT 165 99 x 50 x 77 76 5,093
110 664 110 74
125 593 125 73
150 567 150
175 508 175
217 447 217 4,872

Add-on refrigerated dryer

Model Power consumption Pressure dew point °F Refrigerant Global warming potential — Refrigerant volume lb Refrigerant mass as CO2 equivalent t Hermetic refrigeration circuit
ABT 165 2.4 37 R-513A 631 3.31 0.9 -

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