LJUNGSTRÖM is shaped and driven by a diverse team of highly skilled and experienced industry professionals, with a shared dedication to finding the very best solutions for our customers. Our leaders are innovators, creative thinkers, and pioneers, who have been breaking new ground in energy recovery and air preheater technology for decades.


Built on research, experience and a dedication to finding the very best solutions for our customers

At LJUNGSTRÖM, there is a strong thread that connects our history to our research and development. Anyone who’s ever created something out of nothing knows it takes hard work and an understanding of the industry needs. It’s not just about how a product works; it’s about how it affects operations as a whole. Our research and development activities enable us to develop innovative solutions that find ways for us to take the industry to the next level and unleash the power of the air preheater.

For over ninety years, LJUNGSTRÖM is known as a world leader in energy recovery equipment and technology. Since the very beginning, we have aimed to push the boundaries and remain at the forefront of what we do.

As pioneers of air preheater technology and gas-gas heater systems, we are constantly evolving, adapting and refining our products, systems, components and technologies to deliver optimal performance and enhanced efficiency to the hydrocarbon processing industry and the thermal power plant.

Superior Manufacturing

Our six, digitally connected, global manufacturing facilities provide a range of cutting-edge equipment and processes and are continually upgraded to meet the changing demands of our customers.

We use the latest technological innovations to deliver superior products that add real value to your operation.

Ongoing Research and Development

We invest heavily in research and development so that we can continually adapt and meet the needs of our industry – now and in the future. We have never been afraid to challenge traditional design and manufacturing processes to unlock brand new solutions and, as a result, our breakthrough technologies are always advancing. Each new iteration of an element, component or product builds on the last, enhancing its best features and delivering optimized performance.

About Triton

Building better businesses

LJUNGSTRÖM is owned by funds advised by Triton. Triton is an international investment firm, founded in 1997. The company seeks to contribute to building better businesses for the longer term through partnership.

Triton invests in medium-sized businesses with management located in Europe that fall within the Industrial, Business Services and Consumer/Health sectors.

Triton funds’ approximately 180 investors include, among others, pension funds, sovereign wealth funds, insurance companies and endowments. Triton includes environmental, social and governance criteria into investment considerations and decision-making processes which help to capture long-term value.

Since its founding, Triton has completed more than 70 investments and supported more than 260 acquisitions.

For more information, please visit: www.triton-partners.com


Our position as industry leaders is a direct result of our commitment to customer satisfaction, as well as our ongoing dedication to developing advanced technology that meets our customers’ needs

Enhancements & Upgrades

We can refurbish existing equipment, replace components, or upgrade your entire system to restore the thermal efficiency and leakage control of your operation to better than new.

Upgrade to the Ljungstrom® Air Preheater and the Ljungstrom® Gas-gas Heater to boost the performance and efficiency of your operation.

Enhance your processes with our industry preferred auxiliary systems and state-of-the-art technologies.

We offer multiple configurations, to suit your space and setup.

Hassle-free replacement of your full air preheater unit, with a unique drop-in design that attaches directly to existing support foundations.

Certified Ljungstrom® parts and components

Replacement of heating elements

Replacement of rotor components that have become worn over time

Auxiliary system parts (drive, bearings, etc)


Our technical service specialists and engineers, along with our authorized partners, will carry out world-class inspections of every element and component within your operation and provide a detailed report. Inspections can include:

Heating element basket review and recommendations

Rotating component life assessment

Condition assessment of sealing system and drive system

Shaft position and bearing inspection

Cleaning system efficiency evaluation

Assessment of operating parameter and performance

Remote Visual Inspection – Utilizing the latest aerial robotic technologies

Efficient Sealing System

Offering unique benefits during both hot and cold commissioning

Multiple ways to reduce leakage

Load-following leakage control systems

Customized Maintenance Plan

We’ll work closely with you to create a tailored maintenance plan, including recommendations for work to be carried out during planned outages. We will carry out an initial condition assessment and provide a detailed report, with recommendations that are tailored to you and your operation. This includes labour and resource planning, repairs, upgrades, replacement parts and installation services.

Emergency Services

We have a responsive team of expert technical service specialists and engineers who are the best in their fields. They are available to diagnose and repair any problems on-site, every day of the year, to help you optimize the operation and reliability of your equipment.

If you are interested in our technology and services, or would like to get in touch for any reason, we would love to hear from you.


Starting in 1923, when Fredrick Ljungström developed the world’s first air preheater to our newest power plant improvement, the AdvX® Heat Recovery Technology, we have continuously improved our products and services to bring innovations to market.

With over 15,000 Ljungström® Air Preheaters installed globally – 3x as many than other companies – we have grown to be the most significant and largest provider of air preheater technology, the history of our company is the history of the air preheater.

In the 1970s, our team of engineers developed our cutting-edge air preheater into a powerful gas-gas platform, and our world-leading of Ljungström® Gas-gas Heater systems have been operating in coal and oil-fired plants and industrial markets around the world ever since.

LJUNGSTRÖM combines the resources of the leading names in our industry, including SRM, Air Preheater Company, Kraftanlagen, Gadellius, Stein, PBS, and APEL.

Our proven performance, reliability and commitment to ongoing innovation have enabled us to maintain our reputation as the industry experts in air preheater and gas-gas technology.


Frederik Ljungström of AB Ljungström Ǻngturbin (ALǺ) in Stockholm, Sweden invents and patents the Ljungström® Air Preheater


The first commercial ‘land’ boiler installation of a Ljungström® Air Preheater by ALǺ is installed in a chocolate factory in Stockholm, Sweden


ALǺ’s first installation in USA was manufactured in Wellsville for installation at the International Paper Company of Niagara Falls, New York, USA


The first element profile sheet pair using undulated sheets was introduced – the Ljungström® NU (Notched Undulated)



Gadelius becomes a licensee of ALǺ and starts manufacturing air preheaters in Kobe, Japan


The USA great depression lead ALǺ to sell Air Preheater Corporation (APC) to the Superheater Company of America


Kraftanlagen Aktiengesellschaft in Heidelberg, Germany becomes a licensee of ALǺ


The start of World War II changed normal business. Air Preheater Corporation (APC) in the USA supported the fabrication of boiler casings for Liberty ships, cargo vessels, aircraft carriers and destroyers – for a total of 1,500 steam generating units for the U.S. Maritime Commission


Air Preheater Corporation (APC) was presented the U.S. Maritime “M” award in recognition of outstanding achievement in the Commission’s shipbuilding program during WWII


Air Preheater Corporation (APC) and The Superheater Company merged with Combustion Engineering Company, Inc. (CE)


The Ljungström® NF6 and Ljungström® NF3.5 profiles were introduced


Howden becomes a licensee of Air Preheater Company for V and H Ljungström® technology which was to last through to late 1990s


The Ljungström® DU (Double Undulated) and Ljungström® CU (Corrugated Undulated) profiles were introduced


Air Preheater Corporation introduced the Ljungström® 2.78DU element, now more commonly known as DU3f and HS7


Air Preheater Corporation uses the first enamel coated heating element used on an Ljungström® Air Preheaters


On February 24th APC changed its name to Air Preheater Company Inc.



První Brněnská Strojírna (PBS) in Czech Republic becomes a licensee


A total of 10,000 Ljungström® Air Preheaters are now delivered around the world


Stein Industrie in France becomes a licensee of SRM


Air Preheater Company introduced the first Tri-sector Ljungstrom® Air Preheater


Air Preheater Company introduced the first Modular rotor design


Air Preheater Company installs the World’s 1st Ljungström® FGD GGH for a sintering furnace of Nippon Kokan, Japan


Air Preheater Equipamentos Ltd was established in Brazil


Air Preheater Company installs 1st commercial Ljungstrom® GGH for a Utility Power Plant to Chugoku EPCo in Shimonoseki, Japan


Air Preheater Company sign a 15-year license with China Machine Building International Corporation (CMIC) and China National Electrical Equipment Corporation (CNEEC)


The Harbin, Dong Fang, and Shanghai boiler companies start to use the Ljungström® Air Preheater design on domestic boiler installations


1st German Ljungström® FGD GGH went into operation in Wilhelmshavan Power Plant


The Ljungström FNC® heating element were introduced


1st high dust Ljungström® SCR GGH in the world is installed by Kraftanlagen in Germany



Asea Brown Boveri Ltd. (ABB) acquires the power business of Gadelius K.K.


ABB acquires Air Preheater Company and Combustion Engineering, Inc. and ABB Air Preheater Inc. was formed


The power business of Gadelius K.K. renamed to ABB Gadelius K.K.


ABB Air Preheater Inc. granted its 1st Ljungström® air preheater patent in China


The Ljungström® APH becomes the 44th International Historical Mechanical Engineering Landmark by the American Society of Mechanical Engineers (ASME)


ABB acquire the air preheater business of Kraftanlagen Abgastechnik GmbH, in Bammental, Germany


ABB Air Preheater Inc. acquire all intellectual property rights and assets to the Ljungström® Air Preheater technology from SRM in Sweden


The Ljungström DNF® and Ljungström DUN™ advanced heating element profiles were introduced


Environmental retrofits of SCR systems begin in USA


Harbin Boiler Company Ltd sign a new 10-year license


ALSTOM acquire sole ownership of the ABB Power business


Delivery begins of 26 Ljungström® APHs on 13 boilers at the 5,200MW Shoaiba Power Plant in Saudi Arabia



The oldest known operating Ljungström® Air Preheater is retired after 83 years of operation at the Fitchburg Paper Company in Massachusetts, USA


Over 15,000 Ljungström® APH & Ljungström® GGH have been installed worldwide, including those by licensees, establishing a 300% larger installed base than any other supplier


ALSTOM establishes an air preheater office in Delhi, India and a new manufacturing facility in Shahabad, India


ALSTOM installs 4 of the world’s largest size 36 tail-end Ljungström® SCR GGH at the 1135MW Oak Creek power plant in USA


LJUNGSTRÖM, as a division of ARVOS Group, separates from ALSTOM


Ljungström® DN8™ Heating Element were introduced


Ljungström® TF4™ Heating Element were introduced


LJUNGSTRÖM opens a new office in Poland


LJUNGSTRÖM expands into new advanced manufacturing factories in Chennai, India and Nantong, China and opens new offices in Australia