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UHT technology

UHT stands for Ultra High Temperature. This is the sterilization processed mainly used for products with high ph, such as milk, soya, etc.

Indirect UHT Systems

For indirect heating systems, the heating medium and the product are not in direct contact, but are separated by equipment contact surfaces.

MachinePoint Engineering supplied UHT systems consist of tubular heat exchangers or corrugated pipes. They can reach temperatures of up to 145ºC within a very short space of time. The product only needs to stay at such temperatures for 3-4 seconds, and then it will be immediately cooled to a temperature below 30ºC.


Higher efficiency and improved product quality
Energy efficient as heat recovery up to 90%
Lower cost than direct heating systems
Good to process other products rather than dairies

Direct heating systems

The product is heated by direct contact with steam of potable or culinary quality. The main advantage of direct heating is that the product is held at the elevated temperature for a shorter period of time. For a heat-sensitive product such as milk, this means less damage.

MachinePoint Engineering manufactures injection direct heating systems where high pressure steam is injected into pre-heated liquid by a steam injector leading to a rapid rise in temperature between 80 and 145 ºC for 0,5 seconds. Following the product is flash-cooled in a vacuum to remove water equivalent to amount of condensed steam used, until we reach the 80ºC. Then temperature keep been reduced by a heat exchanger.

This method involves fast heating and cooling, and volatile removal, it is only suitable for some products and it is energy intensive.


These systems have more energy performance than indirect ones and they obtain a better quality product as the heating-cooling timing is very quick
Suitable for high PH and higher viscosity products

Common components

Balance tanks, homogenizers, des vents, control systems, etc; are the same for both systems

CIP SIP systems can be integrated

All UHT systems manufacture by MachinePoint Engineering fulfill the FDA, 3A y EHEDG regulations.

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UHT Indirect Systems