CSD series screw compressors

CSD Series Rotary Screw Compressors (60 to 125 HP)

True 1:1 direct drive, IE4 super-premium efficiency, and industrial automation for high-demand, 24/7 manufacturing plants.

The Kaeser CSD Series delivers reliable, continuous-duty compressed air for industrial facilities requiring 257 to 707 acfm at operating pressures from 80 to 217 psig. Built with gearless direct drive couplings, premium efficiency IE4 motors, and single-stage fluid-cooled SIGMA PROFILE® airends, the CSD Series is optimized to deliver significantly more air with lower kW consumption across all operating pressures..


Request a Quote | Find a Local Distributor | Download CSD Series Specifications (PDF)

 
 

Why Choose the Kaeser CSD Series?

Intelligent Automation & System Control

  • SIGMA CONTROL Automation: The SIGMA CONTROL continuously tracks operating metrics, predicts maintenance needs, and integrates with factory management systems or the SIGMA AIR MANAGER 4.0 master controller.
    Standard Anybus Interface: It connects to your PLC or SCADA network via interchangeable communication modules.
    Supported Protocols: Modbus TCP, PROFIBUS DP, PROFINET IO, EtherNet/IP, BACnet/IP, and OPC UA. 
  • SIGMA PROFILE® Airend: Precision-machined, single-stage fluid-cooled rotary screw airend matched in size and profile to operate at optimal speeds for specific power performance. 
  • IE4 Super-Premium Efficiency Motors: Totally Enclosed Fan Cooled (TEFC) motors with Class F insulation protect internal components against dust and heat while delivering industry-leading motor efficiency (available in 460 V or 575 V, 3-phase, 60 Hz). 
  • Independent CAGI Verification: Energy efficiency performance has been independently tested and confirmed through the Compressed Air and Gas Institute's Rotary Screw Compressor Performance Verification Program.

Gearless Direct-Drive Transmission & Heavy Industrial Build

  • True 1:1 Direct Drive: Connects the motor shaft directly to the airend without step-up gears or drive belts. This design eliminates transmission power losses, gear wear, and regular belt tensioning maintenance. 
  • Two-Stage 1-Micron Air Intake Filtration: Traps airborne contaminants before they enter the compression chamber, protecting fluid circuits, airend surfaces, and downstream equipment. 
  • Flexible Cooling Execution (Air or Water):
    Air-Cooled Units: Powerful radial fans pull ambient air through separate cooler and motor zones, ensuring low operating temperatures, simplified ducting via top exhaust, and low sound levels (67 to 76 dB(A)). Coolers are mounted on the exterior of the unit for easy cleaning without disassembly.
    Water-Cooled Units: Supplied with stainless steel plate-type heat exchangers as standard (with optional shell and tube exchangers), ideal for facilities with central chilled loops or closed cooling water circuits.

Thermal Heat Recovery Ready (Up to 96% Energy Recaptured)

CSD with heat recovery
  • Substantial Cost Savings: A 125 HP compressor operating full-time at $0.10/kWh uses over $95,000 annually in electricity. Compressing air converts nearly all electrical input into heat. 
  • Heat Recovery System: With an optional factory-installed plate-type heat exchanger and internal ETM control valve, up to 76% of electrical input energy is recoverable through the cooling fluid to provide water up to 160°F for process or facility heating. Ducting exhaust air allows recovery of up to 96% of total input energy.

Available Configurations & Package Options

SFC 45T - 60 hp screw compressor with variable speed drive and dryer
  • Standard CSD Models: Standalone direct-drive compressor units available in air-cooled or water-cooled variants for connection to existing plant air systems. 
  • Integrated Dryer "T" Models (CSD 90T, CSD 110T, CSD 130T, CSD 145T, CSD 175T): Features a built-in refrigerated air dryer housed in a dedicated, thermally isolated cabinet compartment. Equipped with energy-saving cycling control, a zero-loss ECO-DRAIN condensate drain, and low-GWP R-513A refrigerant.
  • Variable Speed (SFC) Drive Option: Available as an SFC configuration to match fluctuating plant air demand. Learn more on our Variable Speed Drive (SFC) Page.

Technical Specifications

Model Rated Motor Power [hp] Operating Pressure Range [psig] Capacity Range [cfm] Sound Level [dB(A)] Dimensions W x D x H [in.] Base Unit Weight [lb.]
CSD 90/90T 60 hp 80 - 175 psig 257 - 345 cfm 67 dB(A) 70 1/2" x 45 5/8" x 74 3/4" 2954 lb.
CSD 110/110T 75 hp 80 - 217 psig 261 - 411 cfm 69 dB(A) 3109 lb.
CSD 130/130T 100 hp 80 - 217 psig 312 - 527 cfm 72 dB(A) 3527 lb.
CSD 145 / 145T 100 hp 80 - 175 psig 449 - 593 cfm 72 dB(A) 82 3/4" x 52 3/4" x 76 3/4" 4167 lb.
CSD 175 /175T 125 hp 80 - 217 psig 450 - 707 cfm 76 dB(A) 4475 lb.
Note: Integrated dryer ("T") configurations alter overall cabinet dimensions and total package weight. Consult the full product brochure for detailed specifications on all configurations. Specifications subject to change without notice.
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.

Typical Applications & Operating Environments for the CSD Series

  • 24/7 Heavy Manufacturing & Foundries: Engineered as plant-wide primary air supplies, delivering continuous volume with minimal power consumption under high-ambient, dirty industrial conditions. 
  • Food & Beverage Processing Facilities: Supplies clean motive power for bottling lines, conveyors, pneumatic conveying, and sorting equipment while offering thermal heat recovery to preheat wash-down water. 
  • Automotive Stamping & Chemical Processing: Integrates seamlessly into plant-wide PLC/SCADA supervisory systems to balance fluctuating factory demands alongside central air-treatment packages.

Browse rotary screw compressors by rated horsepower (HP)

horsepower icon

Our 3-30 hp compressors use a space-savings v-belt drive design and many are available as complete compressed air systems with receiver tanks and integrated dryers. On larger units we use only true direct drive, providing maximum power transfer and efficiency from motor to airend. Options include integrated refrigerated dryers and variable speed drive.

Frequently Asked Questions

What is the difference between the CSD 130 and the CSD 145?

Both models use a 100 HP drive motor. The CSD 145 utilizes a larger displacement airend housed in a larger cabinet, delivering up to 15% more airflow at 125 psig (548 acfm vs. 469 acfm) for facilities where maximizing CFM per kilowatt is the top priority. The CSD 130 features a more compact cabinet footprint, quieter operation (72 dB(A) vs. 76 dB(A)), and availability in higher operating pressures up to 217 psig.

Are CSD compressors available as water-cooled units?

Yes. All CSD models can be ordered as water-cooled machines equipped with stainless steel plate-type heat exchangers as standard equipment (shell and tube exchangers are available upon request).

How does the CSD integrated dryer reduce operating costs?

The optional integrated refrigerated dryer uses energy-saving cycling controls to shut down refrigeration circuits when air demand drops. It also uses zero-loss ECO-DRAIN condensate drains, eliminating the waste of compressed air common to timed solenoid drain valves.

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