Holo-Flite is an indirect heat exchanger utilizing a hollow screw for heating, cooling or drying bulk solids, filter cakes, pastes or sludges. 

Metso has over 60 years experience in the application design and manufacturing of indirect heat exchanger systems and components. 

The HoloFlite is a proven and efficient thermal processor with over 3,000 installations worldwide. 

In the Metso Holo-Flite® processor, individual particles are heated or cooled as they come in contact with the surfaces of the hollow flights, shaft and trough. 

The product to be processed is continuously conveyed in an axial direction by means of the rotating screw flights along a jacketed trough.