Multi-Pass Heat Exchanger

Improves heat transfer of viscous materials.

HRS Heat Exchangers

The new HRS multi-pass heat exchanger improves heat transfer of viscous materials.

The unique R Series of scraped surface heat exchangers are well established for multi-tube scraped surface installations thanks to its ability to provide a large surface area with a very small footprint, and the use of a helical scraper system. Now, the company has launched a new multi-pass version – the RMP Series – aimed at improving heat transfer for challenging viscous materials.

Available in single and multiple tube configurations, one of the most popular models in the standard R Series is the R3. Containing three tubes, it provides a greater heat transfer area and capacity within the same footprint as a single unit, as well as all the benefits of a single heat exchanger, such as a single set of connections to the product and services, and the reliability and cost savings of a single drive assembly compared with multiple motors.

In its standard configuration, product passes from a single-entry point through each of the three tubes in parallel before exiting the exchanger from a single port. This arrangement reduces the overall velocity of the product as it passes through the heat exchanger and prevents operation in a pure counter-current flow.

However, the new multi-pass arrangement, known as the RMP, now links each of the three tubes in series: product enters through one tube, passes down the next and then moves back up the third. The use of longitudinal baffles in the outer shell achieves a true counter-current flow to improve heat exchange efficiency, while maintaining product velocity helps reduce pressure drop and increases product mixing.

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