STAGE V Logo
MOBILAIR M500-2 Oil-Free Portable Compressor

Oil-Free Portable Air Compressor

Up to 45.8 m³/min | MOBILAIR M500-2

A compressed air giant, the MOBILAIR M500-2 is a portable powerhouse for large projects requiring a reliable, continuous supply of quality oil-free air.

  • Flow rate: Up to 45.8 m³/min (1617 cfm)
  • Working pressure: 3.0 to 10.3 bar (149.3 psi)
  • Engine Type: Caterpillar C18 Diesel engine
Find Out More

Additional Information

Setting new standards for the 50 cubic metre class, KAESER’s flagship M500-2 combines all the advantages of a two-stage oil-free compression rotary screw compressor with those of a portable unit: maximum compressed air delivery volumes and quality, coupled with unrivalled flexibility.

The MOBILAIR M500-2 excels when operating in industrial applications. This compressed air titan is ideal for providing compressed air bridging operations when maintenance or repairs are required or for operating as a backup system when compressed air demand is high. Its also at home in power stations, in the automotive, food, petrochemical and pharmaceuticals industries, or for refinery applications.

The integrated SIGMA CONTROL MOBIL controller adjusts engine speed to deliver the exact volume of air needed for the specific task at hand at pressures between 3.0 and 10.3 bar. I addition, the compressed air discharge temperature can be preselected.

Design & Equipment includes:

  • Compressed air aftercooler fitted as standard
  • Fleet Management via modem as standard
  • Optional skids version for stationary applications
  • Refinery equipment as standard – including certified spark arrester, engine shut-off valve and closed floor pan
  • Numerous features to facilitate set-up and secure transportation (chassis with parking brake, lifting and lashing eyes, forklift pockets)

For complete product information and technical specifications, please view or download the M500-2 product brochure PDF.

BENEFITS

Environmentally friendly, today and for the future: Thanks to its state-of-the-art exhaust air treatment system, the dependable, low-emissions Caterpillar diesel engine integrated into the machine meets the stringent standards of EU Emissions Stage V.

Maximum, long-lasting efficiency: Due to an innovative special coating which remains resistant to temperatures of up to 300 °C, the blasted and phosphate-treated rotors exhibit no measurable trace of wear, even after years of operation.

Minimal downtime: Thanks to its generously sized fuel tank, the M500-2 can run throughout two consecutive shifts and, when connected to an external tank, can even run in continuous operation.

What Our Customers Say

Posted on Google Google
Jason Slater profile picture
Jason Slater
20 October 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Have used this company for many years and the service we receive is always first class, wouldn’t use anybody else.
Posted on Google Google
Mike Hannan profile picture
Mike Hannan
14 October 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Excellent service from initial contact with Scott in the office and time and repair of compressors was outstanding by engineer with full explanation of cause and future plan.
Posted on Google Google
Lewis Wafer profile picture
Lewis Wafer
9 October 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Top class service from Rob Spark - Inverness. We had an oil leak in our compressor and Rob was with us within an hour. He cleaned, diagnosed, fixed and observed the compressor until he was happy with it. He then explained to me and my colleagues more about our compressor and the controls of it in 5 minutes than we had learned over the years of working with it. Excellent service. Lewis Minty Supervisor Norvite
Posted on Google Google
Callum Fraser profile picture
Callum Fraser
2 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Kerr Compressors supply a very reliable and professional service o Glenfarclas Distillery , Graeme M in sales and after service and Robert B in the service department are excellent in everything they do.
Posted on Google Google
Grant Garrick profile picture
Grant Garrick
20 August 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Delt with Graeme Myron for the purchuse of a new Air compressor for one of our concrete plants, very smooth and simple proccess, look forward to dealing again in the future Grant Garrick-Pat Munro LTD
Posted on Google Google
Conan 23 profile picture
Conan 23
18 August 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Massive shout out and thank you to yourselves and especially your engineer Daryll. His knowledge is like 2nd to none a very polite, professional & well mannered man. He was on our site today and took the time to explain a few things over his customer service skills aswell as problem solving skills should be rewarded. Thanks a lot Daryll 😊
Posted on Google Google
Duncan Wilson profile picture
Duncan Wilson
18 August 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Daryll On time tidy work as always cheers bud
Posted on Google Google
8to8 Forres profile picture
8to8 Forres
28 May 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Excellent service from Kerr Compressors. We called with an issue at 4pm and their engineer, Keith, arrived by 8am the next morning. He quickly diagnosed the problem and had everything fixed efficiently with no downtime. Fast response, professional service and great communication throughout. Highly recommend
Posted on Google Google
sue evans profile picture
sue evans
21 May 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Very happy with the service. We’ve had 3 new compressors installed and everything has been excellent from start to finish. The team were professional, efficient, and the installations were completed to a high standard. Would definitely recommend.
Posted on Google Google
Buchan Main profile picture
Buchan Main
20 May 2026
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Keith on site at Aviemore WTW servicing our lime room compressor, professional job, plant left clean and tidy as usual.

Have a Question?
Speak to a Compressed Air Expert

Our experienced and knowledgeable specialist engineers provide expert product advice, meticulous service assistance, and professional technical support for all makes and types of commercial and industrial compressors and equipment.

Call us now on 0800 008 6588
Have a Question?

Get in Touch

Call us on 0800 008 6588, email us on web.enquiry@kerrcompressors.co.uk. You can also use the form below to request a quote or make a general enquiry. For product quotes, please specify which product you are interested in and your requirements. We aim to respond to all enquiries within 2 hours and always within 24 hours.

  • 45+ Years Experience
  • Qualified Engineers & Professionals
  • Industry-leading reputation
  • Coverage across Scotland
  • Excellent Customer Service
  • Practical Solutions
  • Packages tailored to each project

Sales & Service Centres

GLASGOW (Head office)

37-39 Fairfield Place
College Milton
East Kilbride
GLASGOW
G74 5LP

View Centre
PERTH

Unit 15C
Riverview Business Park
Friarton Road
PERTH
PH2 8DF

View Centre
ABERDEEN

Unit 29, City South Business Park
Bankhead Drive
Portlethen
ABERDEEN
AB12 4XX

View Centre
Inverness

Unit 1
17 Longman Drive
Longman Industrial Estate
INVERNESS
IV1 1SU

View Centre