Spiral Freezers can be applied to many different food products from meats to baked goods, donuts, pasta and fruits. Bacteriostatic treatment is used to extend the shelf life of product. Deep freezing is a very delicate phase in some production cycles of the food supply chain. Tunnels and spiral belt conveyor towers provide for deep-freezing that is innovative and efficient. Spiral freezing systems with tunnels or spiral belt conveyor towers can reach temperatures of -35 °/-40°C C in a very short time.