Keep production flowing with a portable compressor.

Our brand new Kaeser M500-2 Oil-Free Compressors are available through our rental program and sales department.

The two-stage, oil-free M500-2 is an ultra-reliable source of rental air for site work. It is also a perfect fit for backup air for manufacturing and process applications during plant maintenance periods, or to provide temporary auxiliary air during peak production periods.

Powered by the dependable 600 hp Caterpillar C18 diesel engine, the M500-2 is engineered for fuel efficiency and ease of operation. With a full load fuel consumption of 21 gal/hr and a 248 gallon fuel tank, M500-2 delivers up to 1600 cfm continuously for up to 12 hours. Run time can be extended using external fuel connection (standard).

The Sigma Control Mobil™ matches air flow to meet varying air demand while maintaining steady pressure. With standard Proemion telematics, Kaeser fleet management is at your fingertips. Operating status and maintenance reminders are all available via laptop, smartphone, or tablet to avoid unscheduled downtime. M500-2 can be started remotely and the geofencing feature can prevent unauthorized use.



  • Pressures from 58 to 150 psig
  • Caterpillar C18 diesel engine
  • Stage IV, Tier 4 Final exhaust emissions
  • Sigma Control Mobil™
  • Proemion telematics with GPS/GSM-modem for Mobilair fleet management
  • Up to 12 hours operation on one tank of fuel
  • Switchable fuel supply
  • Aftercooler with moisture separator
  • Adjustable discharge temperature


This giant portable compressor can be used in industrial applications requiring large volumes of compressed air, especially when it is needed to bridge maintenance outages or when a plant is being upgraded. Other potential applications include tunnel construction and pipeline flushing in refineries.


At the heart of the M500-2, which is specifically designed for industrial applications, is a proven two-stage dry running rotary screw compressor. Thanks to an innovative special coating that withstands temperatures up to 300° C, the machine's sandblasted, phosphated rotors show no signs of wear, even after many years of operation. This translates to consistent high energy efficiency and no increase in fuel consumption over the operating life of the machine. A large capacity fuel tank enables back-to-back operation over two shifts without the need to refuel. Continuous operation is also possible via an optional external fuel tank. The reliable on-board Caterpillar low-emission diesel engine has an integrated particle filter. The type C 18 engine is rated at 447.5 kW.


The integrated Sigma Control mobile controller automatically adjusts the motor speed to the exact pressure set-point between 58 and 150 psi. Compressed air discharge temperature can also be selected via the controller. The M500-2 comes with a spark arrestor and motor shutoff valve for installation in refineries and is mounted on a supporting chassis with parking brake so that it can be quickly and safely positioned anywhere. It also features crane and lashing eyes, as well as forklift pockets. This giant unit, which weighs in at just less than twelve tonnes, can therefore be precisely placed exactly where needed; the parking brake on the chassis also ensures that it stays put.


In the unlikely event of a fault, the integrated Mobilair fleet management system automatically notifies Kaeser Service. Everything is accessible online.

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