Dryer and MG cylinders are steam-heated cylinders, that remove moisture from the paper sheet after it has been formed and pressed.

Dryer cylinders are responsible for evaporating the remaining moisture from the paper sheet, typically between 40-60% moisture content, to a final moisture level of around 5-10%. Dryers are typically located in the drying section of a paper machine, after the press section. They operate at high temperatures, typically between 100-180°C and under moderate pressure, typically around 1-5 bar.