Cylinder dryer , heads and journals are made of special cast iron. Separate journals are bolted onto the dryer heads, Dryer shells are ground on the outside and turned on the inside, while all dryer journals with steam or condensate pipes have insulation sleeves. The inner surface have grooves for the stationary siphons, the front side ends of all dryers contain manholes.
The main parts of cylinder dryer include: shell,dryer bars,syphon, manhole cover, shell head, spherical roller bearing, steam joint ,etc.

The heat energy for paper drying comes from steam as it condenses inside the dryer cylinders. The type of heat is referred to as latent heat.Steam always condenses at the saturation temperature as defined by the pressure in the system,steam is usually transported at a temperature considerably above the saturation level to prevent condensation within pipe lines.