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This patent is concerned with the duo-cone type of mechanical face seal that is used in earthmoving equipment applications. Elastic layers (28, 29) are used on the conical surfaces of the seal rings and housing respectively. The purpose is to inhibit entrainment of debris.
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A seal that is used for creating a seal between the plug and cage of a control valve is described. The valve cage is located in the valve body and includes an internal surface, sized to receive the valve plug such that a gap between the valve cage and the valve plug defines a leak path. A sealing ri
John Crane developed the first non-contacting, dry-running gas seal 30 years ago, according to Hosanna.
ary seal assembly. This enables the mechanical seal to be fitted to equipment where the shaft is out of alignment with the equipment casing. This ability to accommodate angular variation can be achieved without any consequential misalignment of the sealing faces of the seal.