Contherm® Scraped-Surface Heat Exchangers

Tetra Pak^® heat exchangers

Contherm^® Scraped-Surface Heat Exchangers

Contherm^® scraped-surface heat exchangers, supplied by Tetra Pak^®, are designed for the continuous, hygienic heating and cooling of viscous, sticky, heat-sensitive and particulate food products. They work with a wide range of heating and cooling media, and several units can be connected in series for in-line heating and cooling.

The product is pumped into the lower end of the vertical heat transfer cylinder. As it rises, rotating scraping blades keep it moving and continuously remove it from the cylinder wall, so the surface stays free of fouling and heat transfer remains high and even. The medium flows counter-current in the annular space between the cylinder and an insulated jacket. The drive motor sits on top, and rotor speed and product flow can be adjusted to the application. At start-up all air is purged from the product side, and at the end of a run the product can be pushed out with water for minimal product loss.

• Applications: Continuous heating and cooling of viscous, sticky, heat-sensitive and particulate food products.

• Sizes: Four models (6x3, 6x6, 6x9 and 6x11) with heating surfaces of 0.28, 0.56, 0.84 and 1.0 m², all with a 152 mm inner cylinder diameter; the maximum flow rate depends on the application.

• Design: Modular unit for vertical mounting on a wall or column, hydraulic lifting device for lowering the rotor, tangential product ports for gentle treatment, design compliant with ASME, PED and 3-A; working temperatures from -34 °C to 170 °C.

• Options: Different drive motors including explosion-proof versions, alternative cylinder materials and coatings, several rotor diameters including a low-shear rotor for particulates, blades in stainless steel or plastic (also metal-detectable) and horizontal mounting.

Built for demanding products: The heating surface is made of stainless steel honed to a very fine finish, and the blade material and configuration are selected for each application.

With continuous scraping and a compact vertical design, Contherm^® scraped-surface heat exchangers keep heat transfer stable even with sticky and lumpy products. Contact us today to learn more.

Looking for a heat exchanger without moving parts for particles up to 25 mm? Discover the Tetra Pak® Coiled Heat Exchanger