This Serap Crust Flow V2 is a confectionery machine — specifically a crust-flow tunnel freezer, sometimes referred to as a cryogenic freezer — designed to freeze food products rapidly and evenly using liquid nitrogen as the refrigerant. The process works by forming a frozen crust on the outer surface of each product almost immediately upon contact with the cryogen, while the interior freezes more gradually. This two-stage freezing action helps preserve the texture and flavour of the product more effectively than slower conventional methods, and it minimises weight loss caused by dehydration and moisture evaporation. Serap, working in partnership with Air Liquide on this system, produces industrial cryogenic freezing equipment for the food processing sector, serving applications across meat, fish, poultry, fruit, pasta, cheese, ice cream, and similar products.
The machine is constructed entirely from stainless steel, making it suitable for the hygienic demands of food production environments. Product is fed in from the top and conveyed through the liquid nitrogen zone via a vibrating trough, the speed of which is continuously and steplessly adjustable to suit different product types and throughput requirements. This configuration ensures even distribution of the cryogen across the product stream and consistent freezing results across the full working width.
In terms of capacity, the freezer handles between 300 and 2,000 kg per hour, making it adaptable to a wide range of production volumes. The working width of the freezing section is 555 mm, and the freezing zone itself extends 1,300 mm in length. Product enters at a height of 1,680 mm and exits at 790 mm. The unit runs on a 400 V three-phase supply (3+N, 50 Hz) and has a power consumption of 1 kW. Total machine weight is 900 kg.
The system comprises three physical assemblies. The freeze tunnel measures 2,350 × 1,100 × 1,860 mm (W × D × H), the nitrogen installation unit measures 850 × 700 × 1,880 mm, and the control cabinet measures 600 × 300 × 800 mm. The overall installed footprint of the combined system is 3,200 × 1,100 × 1,880 mm. The machine is offered in used condition and is located in the Netherlands.
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