ThermFlex PPE

ThermFlex High-Efficiency Pillow Plate Heat Exchanger®

Compact, Reliable, and High-Performance Heat Exchange Solution

The ThermFlex Pillow High-Efficiency Heat Exchanger® is a groundbreaking solution for efficient heat transfer, engineered to meet the demands of modern industries. With its high-pressure resistance, exceptional stability, outstanding heat transfer performance, and compact structure, it offers a space-saving design ideal for a wide range of applications, including inlet and outlet heat exchangers, condensers, and evaporators.

How it Works

The ThermFlex heat exchanger uses a unique pillow-shaped heat transfer element that maximizes efficiency on both sides of the heat exchange process. Its design enables:

  • Precise heat conduction between the reactor’s inlet and outlet materials, raising the temperature of raw materials at the inlet while cooling the products at the outlet.
  • Effective utilization of waste heat to save energy and reduce emissions, ensuring sustainable operation.

Key Benefits of ThermFlex Pillow High-Efficiency Heat Exchanger®

  • Low Energy Consumption:
    • Achieves minimal pressure drops on both sides, thanks to adjustable plate spacing and height.
    • Shell pressure drop can be as low as 0.05 kPa under certain conditions.

  • High Pressure and Versatility:
    • Handles pressure differentials exceeding 100 bar.
    • Supports negative pressure and vacuum conditions.

  • Cost-Effective and Space-Saving:
    • Compact structure reduces footprint and simplifies installation, transportation, and pipeline arrangement.
    • Flexible form sizes and efficient heat transfer reduce the need for multiple units, lowering investment costs.

  • Advanced Functionality:
    • On-line cleaning capabilities for ease of maintenance.
    • Permeable shell channels allow small amounts of catalyst powder to pass through.
    • Single unit coverage up to 10,000 m².

  • Sustainable Operation:
    • Promotes energy conservation, emissions reduction, and reduced operational costs.

Applications and Working Conditions

Ideal for:

  • Gas-to-gas and gas-liquid heat exchange.
  • Partial or full condensation processes.
  • Evaporation applications.


Typical Applications Include:

  • Hydrogenation inlet and outlet heat exchangers.
  • Carbonylation, methanol, and PX inlet and outlet exchangers.
  • Catalytic cracking inlet and outlet exchangers.
  • Phenol-acetone, cyclohexanone, and glycol overhead condensers.
  • Adiponitrile/acid built-in condensers.
  • Methanol recovery tower condensers.


The ThermFlex Pillow High-Efficiency Heat Exchanger® is the perfect solution for industries seeking to improve operational efficiency, reduce costs, and minimize their environmental impact.

Would you like to visit us for a quality audit?

To ensure the highest standard of our staff, work procedures and production facilities, we gladly put them at disposal for a quality audit. Customers continuously carry out audits at our facilities, to ensure that we live up to general and specific customer requirements. Feel free to contact us for more information.

ATHCO-Engineering A/S is a Danish company founded in 1947

Today we are one of the global leadings in advanced heat transfer technology and recovery. We provide substantial energy savings and customized designs, and we cooperate with leading process-engineering companies, where we utilize each other’s equipment and knowledge in order to develop integrated solutions. We cover everything from design, production, instalment and service.

We improve the internal and external environment for the benefit of the individual and the nature

At ATHCO Engineering A/S we are very keen on making a difference for the environment. Not only are the majority of our products focused on the recovery of heat in the process industry, which means that our customers will experience a “greener” company profile, but we also comply with the strict rules and regulations of the Danish Labor Authorities, thereby holding our self responsible to the environment.

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