Mechanical seal arrangement for high temperature applications

Abstract

The invention relates to a mechanical seal arrangement () comprising a mechanical seal () having a rotating seal ring () with a first sealing surface () and a stationary seal ring () with a second sealing surface (), a pre-tensioning device (), to pre-tension one of the two sliding rings in the axial direction (X-X), a secondary sealing member () disposed on a rear side () of the axially pre-tensioned sliding ring, the pre-tensioning device () pre-tensioning the axially pre-tensioned sliding ring via the secondary sealing member (), and a sleeve (), which is arranged radially inside the secondary sealing member (), the secondary sealing member () being arranged on the rear side () of the axially pre-tensioned sliding ring, the secondary sealing member () having a sealing edge () which is closed in an annular shape in the circumferential direction which projects from the secondary sealing member () in the axial direction (X-X) to the axially pre-tensioned sliding ring, wherein the sealing edge () seals against the rear side () of the axially pre-tensioned sliding ring, and wherein the secondary sealing member () further seals against the outer circumference of the sleeve () with an inner circumferential surface ().