20 HP Rotary Screw Compressors That Keep Air Demand Moving

With service centers nationwide and our 24-hour emergency parts guarantee, Kaeser customers can rely on the best after-sales support in the industry. From global corporations to intelligent trades businesses; from food production to aerospace: Our customers benefit day in, day out, from the quality, safety, and cost efficiency that a Kaeser compressed air supply brings. the Kaeser success story Learn about our development from a machine shop to one of the world's most successful manufacturers of compressed air systems. 20 HP Industrial Rotary Screw Compressors Kaeser's 20 HP Screw Compressor Models Kaeser's 20 hp industrial rotary screw air compressors deliver the sustained output, energy efficiency, and quiet operation that busy shops and production floors demand. Available in multiple configurations, including standard, integrated dryer, variable speed drive, and all-in-one AIRCENTER packages, our SK, AS, and SFC series give you the flexibility to match your compressed air system to your exact application and space requirements. From a multi-bay auto body shop to a woodworking facility or a light manufacturing operation, a Kaeser 20 hp air compressor keeps your tools and processes running without interruption, backed by factory-trained service and the reliability Kaeser has built since 1919. Standard 20 HP Air Compressor Kaeser's standard 20 hp screw compressor models in the SK and AS 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. 20 HP Air Compressors with Integrated Dryers The SK 20T and AS 20T are rotary screw compressors with integrated refrigerated dryers sized for the full flow of the compressor. The dryer is located in a separate cabinet so it is not exposed to preheated air or contaminants from the compressor package. Energy-Saving Control: The integrated refrigerated dryer in "T” units provides high efficiency performance thanks to its energy saving control. The dryer is active only when compressed air actually needs to be dried. This approach achieves the required compressed air quality with maximum efficiency. Eco-Drain: The integrated refrigerated dryer also features a zero loss Eco-Drain. The advanced level-controlled condensate drain eliminates the compressed air losses associated with solenoid valve control. This saves energy and considerably enhances the reliability of the compressed air supply. Climate-Friendly Design: 20HP Rotary Screw Compressor with Variable Speed Drive Complete 20HP Compressed Air System AIRCENTER DUPLEX Model Weight (lb) 703 68 869 1292 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 Fluid / compressed air combination cooler 20 hp Screw Compressors: AS Series Model Weight (lb) 1070 67 1279 IE 3 premium efficiency motor IP 55 Cooling fluid reservoir with three-stage separator system Pressure relief valve Separate aluminum coolers for compressed air and fluid 20 hp Screw Compressors: SFC Series Model Weight (lb) 741 69 906 1329 20 hp Screw Compressors: AIRCENTER DUPLEX Model Weight (lb) 90 74 56 1593 67 1726 Where a Kaeser 20 HP Air Compressor Earns Its Place A 20 hp rotary screw air compressor is ideal for small- to mid-size industrial operations, with enough output to run multiple tools or workstations simultaneously in a footprint that fits a shop or production floor without a dedicated compressor room. Auto Body and Collision Repair Body shops run a demanding mix of pneumatic tools, including spray guns, DA sanders, air hammers, and blow-off wands, often across several bays at once. At 88 cfm (SK 20) to 97 cfm (AS 20) at 125 psig, Kaeser's 20 hp air compressors provide the sustained flow these environments require without the pressure fluctuations that disrupt finish quality. The SK and AS series operate at 68–69 dB(A), keeping the shop quieter than comparable older reciprocating units. Woodworking and Fabrication Cabinet shops, millwork operations, and metal fabrication facilities depend on consistent air pressure for CNC pneumatic feeds, clamps, nailers, and surface finishing. A 20 hp rotary screw air compressor meets the simultaneous demands of multiple stations that a smaller machine cannot, and the AIRCENTER configuration, with an integrated dryer, receiver tank, and optional filtration, keeps moisture out of the lines and maintains clean finished surfaces. Light Manufacturing and Assembly Production lines running pneumatic actuators, air-powered torque tools, or automated packaging equipment need an air supply that keeps pace with the process. Kaeser's 20 hp compressors run at 100% duty cycle, unlike reciprocating units that require rest intervals, making them the right fit for continuous shift operations. Plastics, Printing, and General Industrial What Separates a Kaeser 20 HP Rotary Screw Compressor from the Competition Choosing the right 20 hp rotary screw compressor comes down to what happens after the purchase: how much it costs to run, how long it runs without issue, and how fast it gets back online when service is needed. We engineer our SK, AS, and SFC series to address all three realities, with measurable efficiency gains, a service-friendly design, and intelligent controls that protect your investment for the long term. The SIGMA PROFILE Airend The airend is where efficiency is won or lost. Kaeser's SIGMA Profile rotors require approximately 10 to 20 percent less energy than conventional rotors of the same air delivery capacity. This is not a marginal gain. Over the lifecycle of a 20 hp air compressor running one or two shifts daily, that difference adds up significantly on the power bill. Proven Efficiency Advantage In our systems design approach, KAESER chooses the components that work together in the most energy efficient way possible. Each and every component — from inlet filter to discharge connection — has been carefully designed with performance in mind. In fact, both the SK and AS series are up to 30% more efficient than the competition. With KAESER’s superior system controls, we guarantee an effective system with lower operating costs. Serviceability by Design We build every Kaeser compressor with technicians in mind. All maintenance points on the SK and AS series are accessible from a single side, and windows in the access panel let operators check fluid levels and belt tension without opening the machine. The drive belt uses an automatic tensioning device that maintains consistent power transfer throughout its service life without re-tensioning adjustments. Fewer maintenance steps and longer service intervals mean less scheduled downtime and lower total cost of ownership. SIGMA Control SIGMA CONTROL monitors more than 20 critical operating parameters, shuts the unit down to prevent damage, signals when immediate service is required, tracks preventative maintenance intervals, and provides notice when PMs are due. Remote access via Ethernet and the built-in web server allows operators to check status and review operating data without walking to the machine. For multi-compressor installations, SIGMA CONTROL integrates directly with Kaeser's SIGMA AIR MANAGER 4.0 master controller for coordinated system-wide efficiency. Climate-Conscious Dryer Design Get a 20 HP Rotary Screw Air Compressor Sized for Your Operation Kaeser's 20 hp rotary screw air compressors are available in multiple configurations, so the right fit for your shop or facility exists without compromise. Our compressed air system experts will assess your demand profile and installation conditions to identify the most efficient solution for your specific situation. Request a quote today or find your local Kaeser distributor to get started. Contact KAESER For Your Compressed Air Questions Speak with a Kaeser Compressed Air Engineer to calculate system CFM demands or request a site audit. Our compressed air system experts can help you find the right compressed air solution for you. Is a 20 hp rotary screw air compressor enough for a two- or three-bay auto body shop? For most two- to three-bay collision and body shops, a 20 hp rotary screw compressor provides sufficient output, particularly the AS 20 at 97 cfm at 125 psig, as long as not every bay is running high-demand spray equipment simultaneously. The key consideration is simultaneous tool demand rather than peak single-tool consumption. Shops with heavier spray gun use across multiple bays, or those running HVLP guns that demand higher sustained cfm, should assess their total simultaneous demand against the compressor's rated output before selecting a model. A Kaeser system design consultation will calculate this precisely based on your tools and work patterns. What is the difference between the SK 20, AS 20, and SFC 15 models? The SK 20 and AS 20 are fixed-speed models that differ primarily in physical size, motor protection rating, and flow output. The SK 20 (IP 54 motor) produces 88 cfm at 125 psig and has a smaller footprint, while the AS 20 (IP 55 motor) produces 97 cfm at 125 psig in a larger cabinet with separate aluminum coolers for compressed air and fluid. The SFC 15 is Kaeser's variable speed drive model in the 20 hp class: its motor speed adjusts continuously to match air demand, making it the most energy-efficient choice for operations where demand varies throughout the day. The SFC 15 produces 27–95 cfm at 125 psig across its speed range. How often does a Kaeser 20 hp air compressor need maintenance? How Fino Valley Wines in New Zealand achieved uninterrupted compressed air reliability with KAESER Fino Valley Wines, one of the oldest wineries in Auckland, New Zealand, is successfully scaling production and achieving uninterrupted operational reliability, supported by the installation of a KAESER AIRTOWER 4C all-in-one compressed air system. Complete with filtration, the system provides the essential high air quality needed for the wineries new bottling line, enabling a dramatic increase in output while eliminating reliance on costly bottled nitrogen supply. The Battle in your Pipes: Gravity vs Air Velocity in Condensate Management 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 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? We can help you optimize your compressed air installation. Contact us for a quote or to talk to a Kaeser representative about our products. Only on www.kaeserdeals.com It's a Double-Play! For a limited time take advantage of unbeatable pricing on a pair of SM 10 hp or SM 15 hp units, with an optional air treatment package! Looking for a quick and easy way to compare compressor performance? Search by HP Important Alert We are aware of two e-commerce websites that are falsely advertising KAESER products online.