Abstract: A slide ring seal for sealing a machine component relative to a pressurized media. A slide ring is provided which is axially slidably mountable on the machine component. A bellows is arranged for surrounding an axial portion of the machine component. The bellows has one axial end connected with the slide ring and a second axial end. The bellows includes a sealing member at the second axial end for sealing the machine component with respect to the pressurized media. The bellows has a region between the slide ring and the sealing member which, in a relaxed state of the bellows, has a shape approximately corresponding to the contour of the region that will develop when the bellows is subjected to operating pressures in an installed state of the slide ring seal. A compression spring is arranged to be concentrically mounted on the machine component with respect to the slide ring and the bellows and is disposed between the slide ring and the sealing member.

Abstract: A slide ring seal assembly for installation on a shaft includes an axially displaceable slide ring; an elastic collar arranged coaxially with the slide ring and being in engagement with the slide ring for providing a static seal between the slide ring and the shaft, and a helical compression spring having opposite first and second ends. The compression spring is arranged coaxially with the slide ring and the elastic collar and exerts a radial force on the shaft with at least one first spring turn. The second end is situated at the slide ring and is operatively connected therewith for axially urging the slide ring towards a counterring in the installed state of the assembly. At the second spring end at least one second turn surrounds the slide ring with a radial bias and further, the compression spring axially presses, with at least one third turn, the free end face of the slide ring with the intermediary of the elastic collar.