Heat Exchangers

Category: Heat Exchangers
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INTERNATIONAL:  Alfa Laval has introduced a new compact DM shell-and-tube heat exchanger – the first refrigeration product in this family that has been specially developed for sub-zero temperatires.

The Alfa Laval DM is more compact in size thanks to a new design based on a single-pass dry expansion evaporator instead of the previous two passes, making it more convenient to install in places where space is a constraint. The DM guarantees maximum efficiency at minimum costs, which results in a higher level of competitiveness for applications.

Alfa Laval has developed the DM shell-and-tube heat exchanger with a unique patented refrigerant distribution system in line with the latest European regulations on low GWP refrigerants, optimizing it for R407F and R134a refrigerants, yet maintaining its compatibility with R404a and R507.

The DM shell-and-tube is ideal for supermarket or industrial process cooling as these applications typically demand evaporation temperatures in the range of -10 to -20°C depending on the system efficiency and brines such as propylene and ethylene glycols.

Metal baffles with an advanced design help to improve the brine side performance in the DM shell-and-tube model. Exchange tubes with an inner groove pattern also maximize the heat transfer coefficient and limit the negative effects of pressure drop.

What’s impressive about the DM shell-and-tube heat exchanger is that despite its smaller size, it boasts a significant improvement in performance of at least 15 percent in comparison with the previous model, resulting in a more cost-efficient investment for Alfa Laval’s customers.

“All in all, it is a more compact unit with better performance that gives the customers great value for money,” says Piergiorgio Barbato, Business Manager Shell & Tube.

The first installation of the DM shell-and-tube heat exchanger in Europe is now operational. This new heat exchanger is available for order worldwide.

Alfa Laval is a leading global provider of specialized products and engineering solutions based on its key technologies of heat transfer, separation and fluid handling.

The company’s equipment, systems and services are dedicated to assisting customers in optimizing the performance of their processes. The solutions help them to heat, cool, separate and transport products in industries that produce food and beverages, chemicals and petrochemicals, pharmaceuticals, starch, sugar and ethanol.


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