Ksb Aktiengesellschaft

Jean-Paul Dubois

Claude Wattignier

Jean-Claude Garrigues

Rene Laulhe

Patrick Guiroy

Valve device

A clack valve includes a housing having a circumferential groove. A rotatable valve disk is disposed within the housing. A gap of constant width at any axial cross-section through the disk is defined between the valve disk and the circumferential groove of the housing. A valve shaft passes from the rotatable valve disk into the housing. An elastic sealing cup has a passage opening for the valve shaft. The elastic sealing cup is disposed between the circumferential groove of the housing and the valve disk to seal the valve disk and the valve shaft against the housing. The elastic sealing cup has a curved circumferential flange to engage the circumferential groove. The curved circumferential flange has a material accumulation in a region of the passage opening. The material accumulation is created by an increase of a thickness of the curved circumferential flange to a maximum thickness in the region of the passage opening for the valve shaft.

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Contras, France

Jean-Paul Dubois