To provide an arrangement having a degree of vacuum in a reversely rotating cylinder, e.g. a suction roll, regulatable in various driving speeds so as to suit to various grades of paper in a drying part.

A method for causing adherence of a web to a drying wire so as to prevent the effects of centrifugal forces and of other air-flow phenomena, in dryer groups having a single wire draw and arranged in a multi-cylinder dryer of a paper machine. The dryer groups include heated drying cylinders 10, 11, 12 and 13, a drying wire 17 for pressing the web against outer cylinder faces of the drying cylinders 10, 11, 12 and 13, and guide cylinders or rolls on which the web W runs on the outside face of the drying wire. The guide cylinders have perforations which pass through the cylinder mantle 18 and open into an inside space in the interior of the guide cylinders which is subjected to a vacuum. The vacuum in the guide cylinders is transferred to the outside face through the perforations.