A water tube boiler is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which heats water in the steam-generating tubes.
The heated water then rises into the steam drum. Here, saturated steam is drawn off the top of the drum. In some services (power generation), the steam will reenter the furnace through a superheater to become superheated. Superheated steam is a dry gas and therefore used to drive turbines to produce electric energy by generator.

A fire-tube boiler is a type of boiler in which hot gases from a fire pass through one or more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.
Such boilers are usually used where are not requested high power and sometimes are preferred to water tube boiler thanks to their simpler configuration.

Steam boilers are the typical applications of our “M”, “DM” and “DT” burners type which are designed and offered according to the emission levels required and fuels to be burn.