SX series

SX Series Rotary Screw Compressors (3 to 7.5 HP)

Compact, quiet, and built for maximum energy efficiency in small-to-medium shop environments.

The Kaeser SX Series delivers industrial-grade compressed air in a space-saving footprint. Designed for applications requiring 8.8 to 28.6 cfm at pressures up to 217 psig, the SX Series combines Kaeser's proprietary SIGMA PROFILE® airend technology with low-maintenance belt-drive operation to lower your total cost of ownership.


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Why Choose the Kaeser SX Series?

why choose - SX series

Engineered for Energy Savings & Performance

  • SIGMA PROFILE® Airend: Precision-machined rotors deliver up to 30% energy savings compared to conventional rotary screw designs. 
  • TEFC Motors: Premium-efficiency, totally enclosed fan-cooled (TEFC) motors with Class F insulation protect against dust and harsh operating conditions. 
  • Magnetic Wye-Delta Starter: Reduces electrical current draw during startup for smooth acceleration and reduced electrical grid load.

Quiet & Clean Workspace Integration

  • Low Noise Levels: Heavy-duty enclosure panels lined with thick acoustic insulation keep sound levels as low as 61 dB(A)—up to 10 dB(A) quieter than competing units. 
  • Dual-Flow Fan System: A patent-pending cooling fan draws fresh air separately for the motor and coolers. This "split cooling" design lowers internal operating temperatures and extends lubricant and motor life.

Simplified Maintenance & Serviceability

  • Smart Access Layout: Single-panel access doors expose key maintenance points, cutting routine service time by up to 50%. 
  • Quick-Check Windows: Side panel windows allow service personnel to inspect fluid levels and belt tension without opening the cabinet or interrupting operations. 
  • 3-Stage Fluid Separator: Advanced centrifugal separation and dual-stage coalescing filters keep fluid carryover to 2 ppm or less.

Integrated Configurations & Package Options

kaeser aircenter 7.5 hp compressed air system

The SX Series adapts to your facility's exact air treatment and storage requirements: 

  • Standard SX Models (SX 3, SX 4, SX 5, SX 7.5): Compact standalone compressor package. 
  • Integrated Dryer "T" Models (SX T Series): Features a built-in refrigerated air dryer housed in a separate cabinet compartment to prevent heat transfer from the compressor. Includes an energy-saving zero-loss ECO-DRAIN and climate-friendly R-513A refrigerant. 
  • Complete AIRCENTER Systems: Combines the SX compressor, refrigerated dryer, and receiver tank into an all-in-one plug-and-play package.

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.]
SX 3/3T 3 hp 80 – 160 psig 9.2 - 12.4 cfm 61 dB(A) 23 1/4" x 24 7/8" x 38 1/4" 309 lb.
SX 4/4T 4 hp 80 – 217 psig 8.8 - 16.2 cfm 62 dB(A) 309 lb.
SX 5/5T 5 hp 80 – 217 psig 12.7 - 21.5 cfm 63 dB(A) 320 lb.
SX 7.5/7.5T 7.5 hp 80 – 217 psig 18.7 - 28.6 cfm 66 dB(A) 342 lb.
Note: Integrated dryer ("T") and AIRCENTER 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.

Typical Applications & Operating Environments for the SX Series

  • Automotive Repair & Tire Service Centers: Powers impact wrenches, tire changers, and small vehicle lifts continuously without the drop in pressure or frequent cooling rest periods required by reciprocating compressors. 
  • Light Woodworking & Cabinet Shops: Delivers dry, steady airflow for wide-belt sanders, pneumatic nailers, and CNC routers, keeping dust out of sensitive air components with standard filtration. 
  • Point-of-Use & Localized Workstations: Operates at sound levels as low as 61 dB(A), allowing it to be installed directly on the shop floor or in small fabrication bays where floor space is limited and a separate compressor room does not exist.

Frequently Asked Questions

What horsepower sizes are available in the Kaeser SX Series?

The Kaeser SX Series covers 3 HP, 4 HP, 5 HP, and 7.5 HP models.

What is the sound level of a Kaeser SX compressor?

Depending on the model, SX Series compressors operate between 61 dB(A) and 66 dB(A), making them suitable for installation near work areas without requiring specialized soundproofing.

What is the difference between an SX standard unit, an SX T, and an SX AIRCENTER?

The standard SX is a compact standalone compressor. The SX T includes an integrated refrigerated air dryer mounted inside the cabinet. The SX AIRCENTER is a complete system that includes the compressor, integrated refrigerated dryer, and receiver tank in one unit.

Browse rotary screw compressors by rated horsepower (HP)

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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.

Request a Quote for a Kaeser Compressor

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