| 摘要 |
A sealing gasket (100), has an annular core (150) with flat parallel major faces (160, 170) on which are formed concentric ridges (180) of equal height defined as minor arcs of national circles having centres below the respective major faces of the core and equally spaced between inner and outer edge (200, 210) of the core, thereby presenting blunt ridge peaks for displacement and localised compression of soft sealing material (220, 230) overlaying the ridges and mitigating damage by cut-through irrespective of clamping force applied to flanges between which it is located. The equi-spaced notional circles have radii increasing away from the edges of the core to reduce groove width towards the centre region and promote seating in this region at lower flange clamping forces.
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