Abstract: An arrangement to seal an element (1), moving in respect to an oblong slit, and to reduce friction, in which slit there is as a slealing at least one medium pressurized tubular sealing (4) characterized in that in the element (1), which moves in respect to the slit there is a part (6) tapering off towards its ends and the side of which is furnished with a hole (7) for feeding pressurized medium, for instance air, to the sliding face between the sealing (4) and the part (6), and that there is on the side of the part, at least at a certain distance of the said sliding face, a groove (8) along which pressurized medium can be fed.