Dräger Safety Ag&co. Kgaa

Dennis Leske

Michael Rosert

Thomas Pancur

Harald Heyer

A directional valve includes a fixing lug (), which is arranged eccentrically to a valve membrane () and is arranged at a valve housing (). The dimensions of the fixing lug () are selected for fixing the valve membrane () relative to the sealing surface () of valve seat (). The size of the eccentric offset (x) is in a range between 8% and 15% of the axis length (D) of the greatest longitudinal extension of valve membrane ().

Directional valve and breathing mask with a directional valve

A directional valve for a respirator product includes a valve housing () and a valve seat () for receiving a flexible valve membrane (). The valve seat has a circular and essentially flat sealing surface () surrounding an opening (), which is sealingly covered by the valve membrane during an inspiration phase. A fixing lug (), on the valve housing (), fixes the valve membrane in the valve seat and is arranged offset in relation to the center of the valve membrane, such that an entire circumferential surface of the valve membrane is lifted off from the sealing surface during an expiration phase. The fixing lug is directed essentially at right angles to a flow plane formed by the opening. A counter-support (), within the opening, is arranged opposite the fixing lug such that the valve membrane is mounted with fixed clamping action, between the fixing lug and the counter-support.

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Eutin, Germany

Dennis Leske