One of the first success stories of Svenska Rotor Maskiner is the Ljungström air preheater, invented in the 1920s, that has had a profound role in power stations around the world. In 1995, it was selected as a landmark invention by the American Society of Mechanical Engineers.

It has made a major contribution to increasing the efficiency of large power stations, and is still today one of the products that have reduced carbon emissions to the atmosphere more than anything else.

Since the 1930s, SRM compressor technology has been continually developed and major licensees include Atlas Copco, Hitachi, IR, Carrier, York, Trane, Kobelco and other leading industrial companies.

Rotors make the world go around – and saves CO2 and money with every twist. With over 900 patents in 30 +  countries, Svenska Rotor Maskiner has shown leadership and innovation in energy efficiency for more than 100 years.


As a responsible business, we recognize that we must work together with the market for sustainable transformation.

One example is that we have taken an active role in pushing the frontier for hydrogen-powered transportation forward by offering an environmentally low-cost method for hydrogen production as well as providing components for hydrogen cars.

The story continues

Designing the technologies needed for sustainable energy systems is a highly creative task. Thanks to the experience and eye for innovation of our engineers, SRM’s unique rotor technology is in good hands, and under continuous development.

Looking back, we feel comfortable looking forward. Our accumulated knowledge help us create value for our customers today, as well as the society as a whole. SRM engineers’ knowledge and experience benefit both our core technology and the many systems and application we have built around it.


Everything turns together