Sealing element assembly for shaft seal

A sealing element assembly for a single type mechanical shaft seal assembly, the sealing element assembly adapted to be arranged between the circumference of a rotatable shaft and a static housing surrounding the shaft:

• wherein a first side in an axial direction of the sealing element assembly is adapted to face an enclosed space between the housing and the shaft;
• wherein an opposite second side of the sealing element assembly is adapted to face an ambient space;
• wherein the sealing element assembly is adapted to be moveably arranged in an axial direction between a non-sealing position and a sealing position;
• wherein the sealing element assembly in the non-sealing position is adapted to be arranged at distance from a surface of a plane that is transverse to or tapered up to ±5 degrees to an axis of the shaft;
• wherein in the sealing position the sealing element assembly is arranged to seal against a surface such that the sealing element assembly is adapted to constitute a sealing between the rotatable shaft and the housing when the enclosed space is pressurized;
• wherein the sealing element assembly is a ring-shaped element and is adapted to be movably arranged along a shaft and inside and in sealing contact with a housing and is adapted to be slidably arranged within the housing such that the sealing element assembly is at a distance from the shaft, and movably arranged between a non-sealing position where the sealing element assembly is adapted to be in sealing contact with the housing and at a distance from the shaft and a sealing position in which the sealing element assembly is adapted to be in sealing contact with the housing and at a distance from the shaft and in sealing contact with a flange on the shaft;
• and
• wherein the ring-shaped element comprises a resilient element as a seal and is arranged on a surface of the ring-shaped element facing a transverse surface of the flange and the ambient space and arranged to be in contact with the flange of the rotatable shaft upon pressurization of the enclosed space.