With over 30,000 units handling tough duties worldwide, Compabloc is the market champion when it comes to heat transfer. Laser-welded construction offers superior reliability in duties with aggressive media and high pressures and temperatures. Compabloc also offers 3-5 times the thermal efficiency of traditional shell-and-tube solutions, with a more compact design that is much easier to install and service.

Alfa Laval Compabloc welded plate heat exchanger

Discover how you can improve sustainability

  • Superior heat transfer and minimal fouling combine to give exceptional thermal efficiency and energy savings
  • Asymmetric flows handled easily with flexible flow configurations
  • Crossing temperatures in a single unit maximizes energy recovery and reduces power bills, and boosts your process performance
  • Fully 100% mechanically cleanable with no crevices that can cause corrosion issues
  • Laser-welded plates provide ultimate reliability
Alfa Laval Compabloc is a proven solution for efficient heat transfer in duties with tough media, pressure or temperature demands. It also comes with the backing of the only supplier with deep process knowledge and a global network of experienced experts. Energy-efficient and reliable technology, along with a partner you can count on for the long haul – that’s how you improve sustainability.

Contact us

We will be happy to discuss the benefits a Compabloc can bring you and show how we can help improve your operation.

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Service for Compabloc

Check out our many service offerings as well as our useful tips on how to keep your Compabloc in tip top condition.

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HEXpert selector tool

Quickly find the ideal heat exchanger for demanding process applications. Fill in information about your duty, and within five minutes you can explore a customized recommendation for an efficient thermal solution.

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Discover Compabloc+

The Compabloc family’s well-known efficient, cost-effective and reliable performance is now available for duties with even higher pressures. Discover the new Compabloc+, built with an innovative sealing concept that enables safe operation at up to 60 bar.

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Meet our experts

Improve your sustainability

The champion of heat exchange

The right support to improve sustainability

Improving sustainability with welded solutions

6 reasons to choose a champion

Proven reliability

People choose Alfa Laval Compablocs for one simple reason. They just work, and more than 30,000 units delivered is the proof. Our proven manufacturing and technical solutions lead to high reliability and a long working life. Many Compablocs that have been in continuous operation for decades are still delivering peak performance.

A solution for improving sustainability

Compabloc’s high thermal efficiency leads to higher heat recovery, lower boiler fuel consumption, and reduced CO2 emissions when Compablocs are used for heat recovery.

Simplified maintenance for higher performance

Minimized fouling allows Compabloc to operate with cleaning intervals substantially longer than traditional heat exchangers, reducing lifetime maintenance costs. It is also the only welded heat exchanger where all channels, both hot and cold, can be fully cleaned using a hydro jet, bringing performance back to 100% after every cleaning.

Increased production and reduced installation costs

Bottlenecks related to heating or cooling can often be resolved with more efficient heat exchangers. The compact size of a Compabloc enables you to pack much more performance into the same space, or free up space for other types of equipment. It also means lower installation costs.

Payback in months

High energy efficiency combined with low installation and maintenance costs means Compablocs offer much shorter payback times than other technologies, such as shell-and-tube or other types of welded plate heat exchangers. The equipment often pays for itself in a matter of months.

Ready for any duty

Compabloc is available in a wide range of sizes and is custom made to fit the specific operating and installation conditions. It can be made in virtually any material that can be pressed and welded.


Condensing duties

Compabloc’s short flow path and large cross-flow area ensure low pressure drop and high efficiency, making it ideal for condensing duties. High heat transfer rates and low fouling, make Compabloc the best choice for long-term efficiency and consistent performance. As a result, Compabloc performs condensing duties 2-4 times more efficiently than traditional solutions. Vapour enters from the top of the unit and condenses on the cold plates as it passes through the plate pack, with condensate exiting at the bottom. If the vapour contains non-condensable gases, Alfa Laval can design a two-pass arrangement on the condensing side that permits gas/liquid separation inside Compabloc, eliminating any need for a separator unit. Condensation takes place primarily in the first pass. Sub-cooling of non-condensable gases is achieved in the second pass, which also serves as a mist eliminator.

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Liquid-to-liquid heating and cooling applications

Performing at 3 to 5 times the efficiency of shell-and-tubes, Compabloc is perfectly placed as a liquid-to-liquid heat exchanger (heater, cooler or interchanger). With the ability to handle crossing temperatures in a single unit, and a temperature approach as close as 3°C (5.4°F), Compabloc offers significant energy saving possibilities. Compabloc also handles asymmetric flows with ease thanks to its flexible flow configuration. Since this lightweight unit is installed vertically, installation problems are instantly solved.

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Compabloc as a reboiler

High thermal efficiency, compact size, low static head, minimum fouling and easy cleaning make Compabloc the perfect reboiler. It can be used as a thermosiphon or forced circulation reboiler. Compabloc makes it easy to increase reboiler capacity, offering up to double the capacity of a traditional heat exchanger of the same size, and reducing the installation costs of the distillation tower. The compact size means the hold-up volume, and residence time, is very low compared to a traditional heat exchanger, reducing thermal degradation of the fluid. This makes starting the process quicker, with lower cost for out-of-spec process fluid.

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How it works


Welded plate heat exchanger working principles

Alfa Laval Compabloc welded plate heat exchanger - Exploded view

Sitting at the core of every Compabloc is a stack of corrugated heat-transfer plates made of stainless steel or other corrosion-resistant materials, laser welded alternately to form channels.

The hot and the cold streams flow through alternate channels. Corrugated plates cause high turbulence, resulting in substantially higher heat transfer efficiency with a 50–80% smaller heat transfer area than comparable shell-and-tubes. Flow turbulence also reduces the build-up of fouling. The Compabloc’s unique plate design eliminates dead zones in the heat exchanger.

The two flows in a Compabloc can be configured as single pass, or as multiple pass by using baffles. The number of passes on the hot and cold side can be chosen independently, making it possible to optimize heat transfer even if flow rates on the different sides differ greatly. This unique flexibility means the Compabloc is always optimized for exactly the required duty. The baffles are made to withstand full vacuum, and can be rearranged if design conditions are changed in the future.

Compabloc units have a counter-current flow and can operate with a crossing temperature program (in a single unit), where the temperature approach is as close as 3°C (5.4°F), maximizing energy recovery. The small size and light weight makes it possible to install Compablocs anywhere, for instance at the top of distillation columns or suspended from support structures.

Compabloc - 1-pass condenser

Compabloc - 2-pass condenser

Compabloc liquid-to-liquid

Compabloc reboiler


Boost capacity and cut emissions

Dow Wolff Cellulosics, Belgium, installed two Compabloc compact heat exchangers from Alfa Laval for different duties in one of the plant's solvent recovery columns.

Alfa Laval Compabloc welded plate heat exchanger operating as reboiler in the solvent recovery column at Dow Wolff Cellulosics

Less space. Lower costs. More heat recovery.

An Asian petrochemical company that extracts benzene and toluene from an aromatic-rich stream wanted to increase production capacity, but space was limited.

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A refiner’s formula for energy efficiency

In its efforts to continually implement sustainable practices in its operations, Petronas has invested in cutting-edge energy efficient technology.

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More case stories


Unique features

Compabloc is an unrivalled champion that stands out among other heat exchangers – including other bloc-type designs. It derives its uniqueness from our patented innovations, based on decades of experience in thermal transfer. Combined, these features lead to more reliable and efficient performance, helping you to save energy and improve your sustainability. 

Alfa Laval C-weld

Superior cleaning and extended performance

End-to-end laser weld of the plates guarantees accessibility and protects against corrosion.

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Alfa Laval SmartClean

Fast and efficient flushing of fouling material

Free-flow channel at plate boundaries secures efficient removal of fouling.

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Alfa Laval Xcore

Advanced design for higher pressures

A high-pressure, cleanable plate pattern that increases mechanical strength to improve thermal performance.

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Qualified support at your facility

True onsite service by skilled engineers, anywhere in the world.

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Talk to an expert

We will be happy to discuss the benefits a Compabloc can bring you and show how we can help improve your operation.

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