Abstract: For the simple and cost-effective production of a valve component (1) in the form of a non-return valve or a connecting nipple, in particular for the refueling of natural gas vehicles, or for the pressure-tight connection to a fluid line or a plug-in coupling, wherein the valve component (1) has two housing parts (3, 4) which are connected pressure-tightly to each other and accommodate a valve (7) there within, it is proposed that the housing parts (3, 4) are pressed together at an annular groove (3?).

Abstract: A modular waste drain can includes at least two of the following separate modules that can be selectively attached and detached from each other: an inlet assembly, an outlet assembly and a knife gate valve. An additional module can be provided by a valve guard assembly.

Abstract: A valve device includes a valve element unit for closing or opening a first opening formed in a casing; a valve element driving unit for rotating the valve element unit around an axis to move to a position facing the first opening, and for moving the valve element unit in a radial direction to seat at the first opening; a first sealing member provided on the valve element unit; and a stopper for restricting a rotation of the valve element unit. The valve element driving unit includes a support for supporting the valve element unit to be rotatable; a shaft part having an eccentric shaft portion connected to the valve element unit and having a center located at a position apart from a rotational center by a predetermined distance; and a driving source for rotating the shaft part. The stopper restricts a rotation of the support in one direction at a position where the valve element unit faces the opening.