Description: Shaft-end dynamic-seal wear part installed where the pump shaft penetrates the pump housing. Blocks process-media outward leakage and stops atmospheric air ingress into the pump chamber to maintain vacuum performance.
Dynamic and stationary ring end faces are tightly mated to establish a sealing interface. Prevents internal working-fluid leakage; isolates atmosphere and avoids air backward-infiltration via the shaft passage (which would degrade vacuum). Absorbs minor media-pressure fluctuation and protects the pump internal chamber.
Rotating ring and stationary ring commonly in silicon carbide or graphite. Auxiliary sealing elements: FKM O-rings. Assembly includes springs and thrust sleeves; spring pre-load sustains end-face contact pressure. Special corrosion-resistant material grades available for aggressive service.
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