Among many other products, Frigosystem manufacture conveyor belt coolers, serie HWD. In the food, the resin or the plastic process, the final product may require an additional final air cooling, especially when the environmental temperature is high: the temperature of the parts conveyed by the belt can be shocked by Frigosystem conditioners, specifically engineered for some machine manufacturers. The cooler is equipped with a 3way proportional valve and a control box for an accurate temperature control.