The apparatus includes a seal (423), the seal being a toroidal seal.

The seal (15) comprises a piercable seal.

The reconditioning of the worn out Seal is done without discarding the Seal.

The seal may be a chevron type seal and/or other similar seal having a sealing flange for forming a radial seal.

The mask seal has a primary seal below the nose and a secondary seal alongside the nose.

The cannula seal can include a cross-slit seal.

The sealing element is significantly thicker than the pad, and the flexible coupling isolates the pad from stress experienced in the sealing element.

The gasket further may include at least one gasket retaining bar attached to the body that bar prevents the gasket from being displaced while the spigot is being inserted into the gasket.

The seal has a primary ring (228) and a mating ring (226).

The ring seal is removed and a radially floating brush seal (10) is installed in the seal channel but the brush seal is not fixed to the machine housing.

The annular seal may be disposed in the throat of the hoυsing wherein the annular seal includes the bellows.

The back-up seal includes an extrusion recess extending from a surface of the back-up seal adjacent the main seal along an inner or an outer diameter of the back-up seal.

The radial end walls radially compress the gasket, and the gasket can expand radially outward.

The system also may include a gasket defining a plurality of apertures that extend through the gasket from a top side to a bottom side of the gasket.

The lead connector (30) is secured within the orifice by a defeasible active seal and a locking mechanism, which includes a sphincter seal (52) and a beveled washer (54) which is forced against the sphincter seal upon insertion of an actuator.