Abstract: A dual seal accommodates radial and axial movement, and accommodates positive and negative pressure differentials, when in sealing engagement about a rotating shaft.

Abstract: A dual seal accommodates radial and axial movement, and accommodates positive and negative pressure differentials, when in sealing engagement about a rotating shaft.

Abstract: A dual seal accommodates radial and axial movement, and accommodates positive and negative pressure differentials, when in sealing engagement about a rotating shaft.

Abstract: A dual seal accommodates radial and axial movement, and accommodates positive and negative pressure differentials, when in sealing engagement about a rotating shaft.

Abstract: A spacing mechanism is provided for locating at least one rotatable component relative to a stationary component of a mechanical seal. The spacing mechanism is configured to automatically disengage from the rotatable seal component, and/or its associated hardware, upon rotation of the rotatable seal component. The spacing mechanism may be configured to axially and/or radially locate one or more rotatable components relative to one or more stationary components and may be configured to automatically disengage from the rotatable seal component by the rotation of the rotatable seal component.

Abstract: An improved mechanical seal of the cartridge-type providing an inboard compressed packing seal between dual shaft sleeves and the pump shaft, compressed between the shaft sleeves by action of a plurality of radially arranged set screws. A sharp edge loaded gasket arrangement between axially stacked components which make up the rotary face, the stationary face, the bellows assembly and gland is provided. The axially stacked arrangement is reversible to accommodate either a stationary bellows or rotary bellows application. An annular channel between inner and outer shaft sleeves provides a flow channel for quench fluid flowing annularly inboard to the seal faces and outboard to a quench fluid exit, providing for a uniform annular quench flow.

Abstract: A shaft sleeve for a mechanical seal assembly having fixed radial lugs for rotationally anchoring one seal ring on an inboard side of the sleeve and depressible anchors for rotationally anchoring a second sealing ring on an outboard side of the seal assembly, the depressible anchors allowing sealing rings and holding rings and other component parts to pass from an outboard side to an inboard side by depressing the flexible anchors radially inwardly. The flexible anchors also fix in axial position a collar which mounts the outboard rotary seal ring. The sleeve provides for advantageous stacking of ring components onto the sleeve for assembly of the seal assembly.