Pressure resistance - up to 1050 bar
Up to 6 times smaller than conventional - Shell & Tube heat exchangers
High resistance to cyclic services
Highest safety level, without leak risk
Working temperature: -200°C to 600°C
Temperature approach up to 2°C

Diffusion Bonding

Diffusion Bonding is a manufacturing process in which single components amalgamate to one solid unit ensuring highest leakage safety, temperature and pressure resistance.

1. Patterns are designed for each service and chemically etched on stainless steel plates.
2. Etched plates are stacked and welded through diffusion bonding process, converting them into one solid block of metal (core).
3. When required, multiple cores are welded together. Nozzles and headers are welded on cores to form final K°Bond.

A diffusion bonded Heat Exchanger is designed for operations too challenging for other Heat Exchanger types. It can withstand extreme temperatures and pressures up to 1050 bar. This is why it is the right choice for the most challenging applications in industries like Hydrogen, Oil & Gas or upcoming Power Generation.

Face challenging applications with K°bond


More than 50 million tonnes of hydrogen are produced globally every year to provide fuel for a wide range of industries, including chemicals, metal and food. While hydrogen is not a fuel on its own, it stores energy created from different sources, such as solar and wind power. With more and more hydrogen fuel cell vehicles being brought to the market, the demand for hydrogen fuel stations is growing. Cars, buses and railways powered by fuel cells do not produce harmful emissions – just water vapour.
Hydrogen fueling stations rely on heat exchange solutions that can withstand extreme temperatures and pressures, while taking up minimum space. The Kelvion K⁰Bond offers the perfect solution.


Natural gas is an essential part of 21st Century living. As well as providing a vital energy source in homes and industries, its extraction and delivery network employs millions of people around the world. Natural gas is increasingly being used as a cleaner and cheaper alternative fuel for transportation, from heavy duty trucks, buses and railways to shipping. Vehicles powered by natural gas produce 20-30 % fewer CO2 emissions than those running on gasoline. For decades, Kelvion has been providing innovative, reliable and hardworking heat exchangers that meet the strict requirements of the natural gas industry. The K°Bond offers advantages for applications on FPSO units and gas production platforms, as well as LNG regasification, condensate fractionation and floating LNG processes.


The closed Brayton Cycle gas turbine, with supercritical CO2 (sCO2) as a fluid, offers a more energy-efficient way of generating electricity than the standard Rankine steam cycle used to drive most of the world’s turbines and power plants. Around 67% of the heat created by the Rankine cycle is currently wasted. The closed Brayton Cycle involves recirculating a working fluid, heated in a heat exchanger, to drive a turbine. A supercritical fluid is one that has gone beyond its critical temperature and pressure point so that it is no longer in a liquid or gas phase. As the critical point of CO2 is 31 ⁰C and a pressure of 73.8 bar, it is thermodynamically superior to steam, resulting in a more economic energy conversion. The sCO2 Brayton Cycle is an effective power cycle for concentrated solar power and geothermal power. It is also used to recover waste heat from chemical production processes, to be converted into electricity. The sCO2 Brayton Cycle depends on robust and reliable heat exchange technology for heating and cooling the working fluid. Kelvion’s new K°BOND offers major advances in this area to ensure that the supercritical process is achieved safely.

Kelvion K°Bond HHX-2000


Requirements for Heat Exchangers in Hydrogen Refueling stations are tough and even more demanding when it comes to the refueling of heavy-duty vehicles. To cope with this challenge, we not only used the gained experience in successfully supplying diffusion bonded heat exchangers for the European hydrogen refueling station network. Numerous customer enquiries, the focus on customer needs and cooperations with leading universities provide the basis for our new developed standardized diffusion bonded heat exchanger to be applied in heavy duty hydrogen refueling stations. The new standardized design incorporates renowned and proven K°Bond features like entirely European supply chain and production including cutting-edge diffusion bonding technology. It enables fast delivery times and allows to discus design details even before placed orders. Based on our track record of diffusion bonded heat exchangers for Hydrogen refueling stations we were able to continuously improve our capabilities and gain extensive know-how which allows us to advise our clients and guide them through the technical selection process.

Kelvion K°Bond SHX


For decades, we have been supplying the oil & gas industry with reliable and efficient heat exchange technology for a wide range of applications. Our broad experience and knowledge of the market has enabled us to develop and enhance our product portfolio with innovations. K°Bond, Kelvion’s diffusion bonded heat exchanger, is ideal for applications involving extreme process temperatures and pressures. Combining design with welding expertise, K°Bond withstands pressures up to 1,050 bar and temperatures from cryogenic -200 to 600 °C, while providing significant savings in weight and footprint compared to common heat exchanger solutions. K°Bond with its diffusion bonding technology is perhaps one of the most significant and game-changing solutions for projects with restricted space – May it be for offshore plants (e.g. as high pressure vaporizer) and reliquefaction on floating units.

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