Importance

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Abstract

A shut-off organ for a fluid line, particularly for the turbine feed line of a hydroelectric power plant, has a housing and a clack valve in the housing that can be pivoted between an open position and a shut position. The clack valve has at least one swallowtail-shaped groove, into which an elastic sealing element having an essentially wedge-shaped cross-section that narrows towards the outside is laid. The sealing element rests against a conical sealing seat of the housing with its narrowed outer edge, forming a seal, in the shut position, thereby shutting off the shut-off organ. The possibility of the sealing element being sucked out is precluded even if the clack valve is opened while it stands under high hydraulic pressure, due to a rigid pin that extends through the sealing element essentially crosswise to the longitudinal expanse of the groove.

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First Claim