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Tunnel pasteurizer

Spadoni tunnel pasteurizers are single- or multi-stage systems with heat recovery for pasteurization of packaged products in glass, cans and PET dedicated to the food and canning industry.

Our tunnel pasteurizers are made of 18-10 (AISI 304) stainless steel and are complemented by external heat exchangers and fully inspectable cooling tunnels. They can be fully automated upon request.

Tunnel pasteurizers can be built to work either continuously or in batches, and using both steam and water circulation. Because of the specificity of their use, Spadoni tunnel pasteurizers can be customized to meet each customer’s needs.




Operating principles

A fundamental step in the food production chain to guarantee a quality product, the thermal pasteurization process – unlike that of sterilization – is able to protect the health of the consumer while maintaining the nutritional properties of the processed aliment.

In pasteurization, the product is subjected to a high temperature – up to 100°C – for several minutes. This eliminates any pathogenic microorganisms present, thus guaranteeing the uncontaminated conservation of the product.

In general, tunnel pasteurizers are structured in several sections: heating, pasteurization and cooling. The heating and cooling sections are designed to optimize energy consumption, and the pasteurization sections to maintain the right pasteurization unit ratio.



  • Load-bearing structure, suitably sized, built with 18-10 stainless steel sheets and profiles (AISI 304);
  • adjustable support feet;
  • product-advancement belt inside the polypropylene (PP) tunnel, resting on 18-10 stainless steel (AISI 304) guides and operated by a gear motor, with inverter;
  • infeed and outfeed belt driven by gear motor, with inverter;
  • catenary in 18-10 stainless steel (AISI 304), and motors with casing;
  • water collection tank in 18-10 stainless steel (AISI 304), with inspection hatches;
  • pressure gauges;
  • electric pumps for water circulation;
  • pipes to the ramps, and removable ramps for inspecting nozzles;
  • 18-10 stainless steel (AISI 304) manifold pipes, complete with spray nozzles for uniform water distribution;
  • electronic thermo-registration on band paper to record temperatures and pasteurization cycles;
  • electronic thermoregulation, to control the temperature of pasteurization water;
  • electronic thermoregulation, to control cooling water temperature;
  • steam suction system in 18-10 stainless steel (AISI 304);
  • fan for shelling of containers;
  • electrical panel in 18-10 stainless steel (AISI 304), containing all low voltage controls and motor protections that manage the operation of the pasteurizer.

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