Ceramic valve

An electrically operable ceramic valve of a beverage machine which is adapted for preparing beverages suitable for consumption, comprising at least one inlet, at least one outlet, and at least one liquid flow channel extending between the inlet and the outlet, the ceramic valve further comprising a first ceramic subhousing and a second ceramic subhousing through which the liquid flow channel extends and which are designed to be displaceable along each other by means of an electric drive, for controlling a liquid flow from the inlet to the outlet, the liquid flow channel comprising a bend extending at least for a part in the second subhousing, while the liquid-flow channel in an opened condition of the valve extends upstream of the second subhousing and downstream of the second subhousing in at least the first subhousing, and the first subhousing comprises a first sliding surface having at least one outflow opening and at least one inflow opening, the liquid flow channel extending from the first subhousing through the outflow opening to the bend in the second subhousing, and the liquid flow channel extending from the bend through the inflow opening into the first subhousing, while the second subhousing comprises a second sliding surface, characterized in that the first sliding surface comprises at least one circumferential edge, closed in itself, which projects relative to a part of the first sliding surface where this edge is not situated, in the direction of the second sliding surface, so that an upper side of this projecting edge abuts against the second sliding surface and forms a fluid sealing with the second sliding surface, or that the second sliding surface comprises at least one circumferential edge, closed in itself, which projects relative to a part of the second sliding surface where this edge is not situated, in the direction of the first sliding surface, so that an upper side of this projecting edge abuts against the first sliding surface and forms a fluid sealing with the first sliding surface.