Water Tube Coil Type Boiler: Revosteam

A Water tube Coil type boiler comprises a jacketed MS shell housing a helical coil. The combustion air is forced through the jacketed shell by means of a centrifugal blower thereby getting it pre-heated.
For the Revosteam Boilers, in the coil, the flame travels downwards 1st because of vertical fit-up of the burner inside the coil then the flue gases reverse upwards in the same coil thereby giving 2 passes in the same radiant zone.