The CS FTB steam generator is three effective smoke turns, passing flame and wet bottom horizontal semi-fixed type. It is characterised by heat rimmed tube sheets towards the furnace and also the inversion chamber, in order to exclude the typical mechanical tensions of other constructive forms and absorb the several mechanical dilatations to the various temperatures of exercise. The great quantity of water allows the satisfaction of instantaneous increases of steam requests without influencing the correct and continuous functioning of users, the wide evaporating mirror avoids the drag of water drops also towards sudden steam takings. In practice, the steam produced is “dry” and allows a considerable energy saving reducing the returns in the boiler through the steam unloader present in the installation. The furnace, great in diameter and volume, is designed in order to have a low thermal charge: the polluting substances, contained in rivers, are reduced to the minimum, warranting an optimal functioning both with liquid and with gaseous combustibles. The functioning of the generator is completely automatic and the cleaning and maintenance operations of the internal parts of the generator are made easier thanks to the use of double joint hinged front doors, which can be opened without the removal of the burner and back doors blocked by brass bolts. The insulating shell is formed by high-density huge thickness mineral wool airbeds with external finish in stainless-steel polished until it shines.