Scraped surface heat exchangers can provide thermal treatment for products such as viscous foods and slurries, which have a high fouling potential. A common type has rotary scrapers within a tube, but several designs variations are offered by different manufacturers.

One line of rotating scraped surface heat exchangers, offered by HRS Heat Exchangers, has been designed to provide improved heat transfer. According to the manufacturer, features include:

• Helical blade scraper bar design.
• A gearbox design to reduce noise.
• Multi-tube options to reduce footprint, energy consumption and operating costs.
• Sealing system to allow removal of individual tubes.