15 HP Rotary Screw Compressors

kaeser compressors 15 hp rotary screw air compressors

Kaeser's 15 HP rotary screw air compressor lineup provides small- to mid-sized facilities with a reliable, energy-efficient source of compressed air designed for continuous operation. Whether your facility runs a single shift or around the clock, our SM, SK, and SFC models provide the flexibility to match exactly the right configuration to your air demand. From base-mounted standard units to fully integrated AIRCENTER packages with built-in dryers and receiver tanks, we engineer every 15 HP screw compressor to outperform and outlast.

Kaeser's 15 HP Screw Compressor Models

Standard Fixed-Speed (SM or SK Series): Best for Steady, Predictable Demand

SM 15 - 15 hp screw compressor

Kaeser's standard 15 hp screw compressor models in the SM and SK series offer impressive performance and quiet operation. They feature a robust design with super-silenced, vibration-dampening, and powder-coated panels, suitable for ambient temperatures up to +115 °F. The unit is equipped with an IE3 premium efficiency motor (IP 54) and an innovative dual-flow fan with separate airflow channels for efficient cooling of the motor, fluid/compressed air cooler, and control cabinet. Key fluid and airflow features include a 'Honeycomb' air intake filter, pneumatic inlet and venting valves, a triple-separation system in the cooling fluid separator tank, and comprehensive pressure and fluid management components.

If your facility runs compressed air at a consistent, high load (say, 80% or more of the compressor's rated capacity), a standard fixed-speed model is the most straightforward solution. The SM 15 and SK 15 run at a constant speed and can handle continuous duty without issue. The SK series features a larger airend that delivers up to 69.7 CFM at 125 psig, making it a better fit for applications requiring maximum flow. The SM series trades some peak flow for a more compact footprint.

Both series feature our SIGMA PROFILE airend, which uses up to 15% less energy than conventional rotor designs at the same output. Paired with an IE3 premium-efficiency motor (IP54), fixed-speed models remain simple to operate and maintain without sacrificing performance.

With Integrated Refrigerated Dryer (SM 15T / SK 15T): Best for Air Quality-Sensitive Applications

SK 15T - 15 hp screw compressor with dryer

Any application that runs air tools, spray equipment, or instrumentation through long distribution lines benefits from dry air at the source. Moisture in compressed air lines causes rust, contaminates the product, and degrades tool performance over time.

Our "T" series models include a full-flow refrigerated dryer in a separate cabinet, a design detail that matters. Because the dryer is isolated from the compressor's heat and contaminants, it performs more consistently and lasts longer than dryers integrated directly into the compressor housing. The energy-saving dryer control activates only when air needs to be dried, and the zero-loss Eco-Drain eliminates the compressed air waste associated with timed solenoid drains. The integrated R-513A refrigerant carries 56% lower global warming potential than common alternatives, and our advanced heat exchanger design uses only half the typical refrigerant charge.

 
 

Variable Speed Drive (SFC 11 / SFC 11T): Best for Fluctuating Demand

SFC 11 - 15 hp screw compressor with variable speed drive

If your compressed air demand varies significantly throughout the day (common in job shops, multi-purpose facilities, and operations with intermittent pneumatic tools), a variable-speed drive compressor will save you money every month. Our SFC 11 continuously adjusts motor speed to match real-time demand, producing only the air the system needs at any given moment.

Kaeser SFC units are up to 18% more efficient than comparable variable speed competitors. The SFC 11 operates across a flow range of 21 to 71 CFM at 125 psig, giving it the flexibility to serve a nearly idle system just as efficiently as a fully loaded one. The SFC 11T adds a full-flow integrated dryer for facilities seeking energy efficiency and improved air quality. Learn more about Kaeser's complete Learn more about Kaeser's SFC series of compressors with variable speed drive.
power consumption vs flow rate

A variable speed screw compressor should be the most frequently loaded unit in a properly designed system. Each is optimized to deliver significantly more air with lower kW than comparable compressors.

 
 

AIRCENTER Package: Best for Space-Constrained Installations

kaeser aircenter 15 hp compressed air system

The AIRCENTER combines a 15 HP rotary screw compressor, refrigerated dryer, receiver tank, and optional filtration into a single pre-assembled, pre-wired unit. Installation is fast, the footprint is minimal, and there is no need to source or pipe separate system components. The SK 15 AIRCENTER is also available as the AIRCENTER SFC 11, with a variable-frequency drive, for facilities that want an all-in-one package with variable-speed energy savings. 

For operations that require built-in redundancy, the AIRCENTER DUPLEX pairs two 7.5 HP rotary screw compressors with a refrigerated dryer on a horizontal receiver tank. When one unit handles the load, the other stands by, rotating lead/lag to equalize run hours and protect against unplanned downtime.

 
 

AIRCENTER DUPLEX

kaeser aircenter duplex 15 hp compressor system with a tank and dryer

The 15-hp AIRCENTER DUPLEX comes in four configurations. Each includes two 7.5-hp rotary screw compressors mounted on a horizontal receiver tank, plus a refrigerated dryer:

  • AIRCENTER DUPLEX SX 7.5 with KRYOSEC dryer
  • AIRCENTER DUPLEX SM 7.5 with KRYOSEC dryer
  • AIRCENTER DUPLEX SX 7.5 with SECOTEC dryer
  • AIRCENTER DUPLEX SM 7.5 with SECOTEC dryer
 
 

TECHNICAL SPECIFICATIONS


15 hp Screw Compressors: SM Series
kaeser compressors 15 hp rotary screw air compressors
Model Flow (cfm) Dimensions W x D x H (in) Weight (lb) Noise level (dB(A))
125 psig 160 psig 217 psig
SM 15 55.2 46.6 37.4 25 x 30 x 43 529 68
SM 15T 25 x 43 x 43 695
SM 15 AIRCENTER 25 x 48 x 68 970
  • Super silenced with vibration-dampening
  • All panels powder-coated
  • For ambient temperatures up to +115 °F
  • IE 3 premium efficiency motor
  • IP 54
  • Dual flow fan and separate air flow channels for cooling of the motor, the fluid/compressed air cooler and the control cabinet
  • Fluid and air flow: 'Honeycomb' air intake filter, pneumatic inlet and venting valves, cooling fluid separator tank with triple separation system
  • Pressure relief valve
  • Minimum pressure check valve
  • Thermostatic valve and fluid filter in coolant circuit
  • Fluid / compressed air combination cooler
15 hp Screw Compressors: SFC Series
kaeser sfc series 15 hp variable speed drive rotary screw compressor models
Model Flow (cfm) Dimensions W x D x H (in) Weight (lb) Noise level (dB(A))
125 psig 160 psig 217 psig
SFC 11 21-71* 22-62* 20-50* 30 x 35 x 50 725 68
SFC 11T 30 x 49 x 50 891
AIRCENTER SFC 11 30 x 53 x 74 1312

* Min and max flow range

15 hp Screw Compressors: SK Series
kaeser sk series 15 hp rotary screw air compressor models
Model Flow (cfm) Dimensions W x D x H (in) Weight (lb) Noise level (dB(A))
125 psig 160 psig 217 psig
SK 15 69.7 58.6 47.6 30 x 35 x 50 688 67
SK 15T 30 x 49 x 50 853
SK 15 AIRCENTER 30 x 53 x 74 1276
  • Super silenced with vibration-dampening
  • All panels powder-coated
  • For ambient temperatures up to +115 °F
  • IE 3 premium efficiency motor
  • IP 54
  • Dual flow fan and separate air flow channels for cooling of the motor, the fluid/compressed air cooler and the control cabinet
  • Fluid and air flow: 'Honeycomb' air intake filter, pneumatic inlet and venting valves, cooling fluid separator tank with triple separation system
  • Pressure relief valve
  • Minimum pressure check valve
  • Thermostatic valve and fluid filter in coolant circuit
  • Fluid / compressed air combination cooler
15 hp Screw Compressors: AIRCENTER DUPLEX
kaeser aircenter duplex 15 hp compressor system with a tank and dryer
Model Flow (cfm) Dimensions W x D x H (in) Weight (lb) Noise level (dB(A))
125 psig 160 psig 217 psig
AIRCENTER DUPLEX SX 7.5 (KRYOSEC) 57 47 37 85 x 29 x 64 1362 66
AIRCENTER DUPLEX SX 7.5 (SECOTEC) 1417
AIRCENTER DUPLEX SM 7.5 (KRYOSEC) 64 52 39 85 x 36 x 68 1553
AIRCENTER DUPLEX SM 7.5 (SECOTEC) 1688
 
 

Who Uses a 15 HP Rotary Screw Air Compressor?

The 15 HP screw compressor sits at a practical crossroads: powerful enough for continuous industrial use yet compact enough for facilities with limited floor space. It is the go-to choice across numerous industries. 

Auto body and collision repair shops rely on the steady, consistent pressure this class of compressor provides for spray painting, sandblasting, and pneumatic tool operation. Pressure fluctuations in paint application cause visible defects, and the SM and SK series' stable output eliminates that risk. 

Metal fabrication and light manufacturing facilities depend on consistent CFM output to run plasma cutters, grinders, and assembly tools simultaneously. Our SK 15, which delivers up to 69.7 CFM at 125 psig, handles multi-tool environments without the pressure drops that cause quality issues or production slowdowns. 

Woodworking and cabinet shops often operate in space-constrained environments where noise is a concern. At just 67 dB(A), the SK 15 runs quietly enough that workers can hold a normal conversation nearby, with no dedicated compressor room required. 

Pharmaceutical and food processing operations that require dry, clean compressed air benefit directly from our integrated refrigerated dryer models. The SM 15T and SK 15T deliver air at a consistent pressure dew point without the need for a separate dryer installation, reducing footprint and contamination risk. 

Automotive service and tire centers with multiple service bays typically need 50 to 70 CFM at 125 psig for air tools, lifts, and tire inflation. A single SK 15 or an AIRCENTER SFC 11 covers this demand while maintaining stable line pressure across all bays. 

Plastics, printing, and general industrial applications with fluctuating compressed air demand are ideal candidates for the SFC 11 variable-speed drive compressor. Rather than cycling on and off at a fixed speed, the SFC 11 continuously adjusts motor speed to match actual consumption, reducing energy waste and protecting downstream equipment from pressure spikes.

 
 

Efficiency Benefits: What Sets Kaeser's 15 HP Screw Compressor Apart

Purchasing a 15 HP air compressor is a long-term capital decision. The unit's purchase price is typically less than 15% of its total lifecycle cost; energy consumption accounts for the rest. Kaeser designs every component with that reality in mind. 

  • SIGMA PROFILE Airend: Our proprietary rotor profile is the foundation of every Kaeser compressor's efficiency advantage. SIGMA PROFILE rotors use up to 15% less energy than conventional designs at the same air output. Combined with precision-machined, generously sized roller bearings, the airend achieves exceptional service life without requiring frequent rebuild intervals. 
  • Dual-Flow Cooling Fan: Our innovative dual-flow fan design uses separate airflow channels to independently cool the motor, the fluid/compressed air cooler, and the control cabinet. This approach keeps operating temperatures lower, reduces thermal stress on components, and extends service intervals, a practical efficiency advantage that translates into lower maintenance costs over time. 
  • S Series Efficiency Guarantee: The S series compressors are up to 30% more efficient than comparable competing units. That is not a marketing estimate; it is a design guarantee backed by CAGI-verified performance data. Download CAGI data sheets to compare verified output numbers across manufacturers side by side. 
  • Service-Friendly Design: Reduced maintenance time is a form of efficiency, too. Fewer wearing parts, premium materials, and a smart component layout with generously sized maintenance doors minimize the time your compressor spends out of service. For operations where uptime is non-negotiable, that directly translates into production output. Learn about Kaeser's factory-trained service network.
 
 

Get the Right 15 HP Rotary Screw Air Compressor for Your Facility

Selecting a 15 HP screw compressor is about more than CFM and pressure. It's about finding the configuration that delivers the lowest total cost of ownership for your specific load profile. Our compressed air system experts can review your application, estimate your energy savings with variable-speed versus fixed-speed operation, and help you size ancillary equipment such as dryers, filters, and receiver tanks to protect your investment. Contact us today to request a quote or speak with a Kaeser representative.

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Frequently Asked Questions


What electrical service does a Kaeser 15 HP rotary screw air compressor require?

All Kaeser 15 HP rotary screw compressors in the SM, SK, and SFC series are three-phase units. They are compatible with 208/230V (fixed speed models only) and 460V three-phase, 60 Hz power. Before installation, verify that your facility's available voltage matches the unit's nameplate rating, and have a licensed electrician size the disconnect, wiring, and high current protection per NEC requirements and the compressor nameplate. Kaeser's factory-trained service technicians perform startup visits to confirm proper electrical connection, rotation, and initial operating parameters.

How do I know if I need a variable-speed drive model or a fixed-speed 15 HP screw compressor?

The answer depends on how consistently your facility uses compressed air. If your system runs at or near full capacity for most of the day, a fixed-speed SM or SK unit is the efficient, cost-effective choice. If demand fluctuates significantly (for example, if tools run intermittently or production schedules shift between high and low periods), the SFC 11 variable-speed drive model can substantially reduce energy consumption by matching motor speed to demand in real time. A rule of thumb: when average demand falls below roughly 70–85% of the compressor's rated output for extended periods, a variable-speed drive typically pays for itself through energy savings. Kaeser's system design team can analyze your load profile to make a data-driven recommendation.

What compressed air treatment does a 15 HP rotary screw compressor require downstream?

At a minimum, most industrial applications need a refrigerated dryer and a coalescing filter downstream of the compressor to remove moisture and residual aerosols from the compressed air. Our SM 15T, SK 15T, and SFC 11T models include a full-flow integrated dryer, eliminating the need for a separate dryer installation. For applications requiring very low-pressure dew points, such as instrument air or certain pharmaceutical processes, a desiccant dryer may be the appropriate choice. If your application is particularly sensitive to oil contamination, an activated carbon filter added downstream of the coalescing filter will reduce residual oil content to less than 0.003 mg/m³.

The Battle in your Pipes: Gravity vs Air Velocity in Condensate Management


gravity vs air velocity

Should you be worried about water building up before the separator and flowing back to damage the machine if the separator is located quite high up relative to the compressor? The answer lies less in a strict "maximum height" specification and more in understanding the physics of airflow. It is a constant tug-of-war inside your pipes between two opposing forces: Gravity and Towing Force.

How to Size Compressed Air Branch Lines


pipe ring

Finding the right balance in your compressed air piping system can feel like a game of inches—literally. A common question we receive from system designers is whether varying pipe diameters within a "pipe ring" or loop can actually improve performance. Specifically: Is it beneficial to make the outer lines of a ring larger than the cross-branches?

Uncovering Hidden Challenges: A Case Study on Compressed Air System Optimization


hidden challenges

First impressions can be deceiving. A brand-new, meticulously designed compressed air system may appear flawless on paper, boasting powerful compressors, advanced dryers, and strategic storage solutions. However, delving deeper often reveals hidden challenges and opportunities for enhancement.