Protect liquid foods with overpressure

The tank overpressure system TPU 500 protects liquids in silos from product contamination. (Image source: Freudenberg Filtration Technologies)

The tank overpressure system TPU 500 protects liquids in silos from product contamination. (Image source: Freudenberg Filtration Technologies)

Milk or milk-based liquids, cream, raw fruit juices, vegan soy drinks, liquid eggs, sugar-free sodas – minimizing risks when processing such delicate foods requires a high level of hygiene. An entry point for bacteria, yeasts, and mold spores can be silos and tanks where liquid foods are stored temporarily before further processing or filling. A potential contamination source is unclean air, which can enter through open ventilation slots into the containers. The Freudenberg Filtration Technologies TPU 500 tank overpressure system effectively and permanently keeps germs and damaging particles away from the valuable liquids. The hygienic air quality thus produced prevents waste, protects products from spoilage, and safeguards consumer health. It ensures high product quality and long shelf life. The latter is especially important when liquid foods are pasteurized or undergo extensive further processing, such as raw milk into yogurt, quark, and cheese, or liquid eggs into baked goods and convenience products.

Freudenberg Filtration Technologies offers food manufacturing and processing companies a wide range of filtration materials and filter models for liquid and air filtration as well as dust removal technology. Additionally, comprehensive consulting and service offerings are available, including engineering system solutions. The new TPU 500 tank overpressure system – where TPU stands for the English term Tank Pressure Unit – is among these complete systems offered from a single source.

Contamination-free air ceiling creates a safety corridor

The basic principle is as simple as it is meticulously designed in detail. The TPU 500 system creates a germ-free air ceiling over raw, intermediate, and final liquid products, free from bacteria, yeasts, and mold spores. A slight overpressure in this air ceiling ensures that no unclean outside air comes into contact with the food – even when emptying tanks and silos. Incidentally: The hygiene protection system from Freudenberg also operates reliably in beverage and food industry filling plants.

The man-high modular construction consists of fully welded stainless steel housing parts connected with locking latches; each system can be customized to meet specific on-site requirements. The modularity allows for easy and safe replacement of air filters. The system’s continuous volume flow is regulated fully automatically. The TPU 500 unit continuously monitors pressure development and indicates to operators when filter changes are needed – for optimized production processes and results in food manufacturing.

Two filter stages for controlled air quality

Speaking of filters. The core of the system is based on the proven filtration technology from Freudenberg, used in the food and beverage industry. Two filter stages, consisting of reliable pre-filters and high-efficiency final filters, produce hygienic air quality. The exact filter configuration varies depending on the application and local conditions. All relevant filter series are microbiologically inactive and safe for contact with food. They meet the essential standards of food conformity and comply with the relevant recommendations of the European Hygienic Engineering and Design Group (EHEDG Doc. 47).

Interested parties can find more details on the website. Among other resources, a flyer with additional information is available for download.