Abstract: A sealing strip of a suction roll (4) for a material web machine includes a longitudinal strip element (3) and a longitudinal holder (2) shaped as a U profile open in the direction of a facing surface (41). An element first layer (31) is an easily adjusting material and a second layer (34) is a stiffer material in the loading direction than the first layer. The strip element may be loaded so it or its edge does not substantially bend in the direction of movement of the facing surface. To optionally reduce the effect of abrasion: an inner mantel surface is treated by grain blasting, thermal injection coating, chemical or electro-chemical precipitation coating and/or polymer-based coating; and/or a lubricant or additive is fed between surfaces abrading against each other; and/or at least part of suction holes in a wall of the mantel are broached (71).

Abstract: A glide bearing for a roll having hydrostatic bearing elements provided with bearing shoes fitted to be positioned around a neck of the roll axle in order to support the axle and thus the roll revolvingly with respect to a frame member, such as a bearing block. The bearing elements are hydraulically-operating piston-cylinder devices which may be loaded by a hydraulic pressure medium such that the bearing shoes are able to be positioned freely around the neck of the axle. In one preferred application, the bearing elements are arranged so as to enable displacement of the roll for closing and opening a nip formed in part by the roll.

Abstract: A bearing control system for a roll with hydrostatic bearings which is mounted by its axle on a bearing block or other equivalent frame member by hydraulically loaded hydrostatic bearing elements. A principal bearing element acts in a principal loading direction and another bearing element is a backup bearing element which acts in a direction opposite to the principal loading direction. The bearing elements include bearing shoes positioned freely around the axle in order to support the axle so that the roll revolves freely in relation to the bearing block or other frame member. The control system feeds a hydraulic pressure medium to the hydrostatic bearing elements so that the roll is displaceable in the principal loading direction, e.g., in the direction of the nip plane, by displacing the axle via the bearing elements.