Abstract: A shut-off instrument for a flow medium, in particular a slide valve instrument designed for pressurization on both sides with an instrument housing forming a flow channel and a slide valve chamber and with a soft-sealing shut-off element closing off the flow channel and with a slide valve stem which penetrates a seal arrangement and/or bearing arrangement in a housing neck extension delimiting the slide valve chamber and which is rotationally connected to a stem nut coupled to the shut-off element by a screw contact. The shut-off element is designed to include more than one part and at least one external dimension of the main body is slightly smaller than a nominal width of the flow channel and seal elements are arranged on opposite support surfaces of the main body via an engaged connection projecting over the external dimension with a peripheral edge collar.

Abstract: Tube connection (1) for pullout-resistant connection of an insertion end (2) of a tube (3) to a connection sleeve (4), with a retention ring (18) encompassing the insertion end (2) at the circumference and is disposed in an inner groove (12) of the connection sleeve (4), wherein the insertion end (2) projects beyond the retention ring (18) by an excess length (25) in the insertion direction of the tube, and a sealing ring (34), preferably a lip sealing ring (35), which circumferentially encompasses the insertion end (2) is disposed in a ring groove (33), adjacent to the ring groove (12) and at a distance from it in the insertion direction of the tube end, and the connection sleeve (4) has a slit-shaped wall cutout (13) that allows radial insertion of the retention ring, over a partial region of the circumference of the sleeve section (11) that has the inner groove (12), wherein the wall cutout (13) extends over a cross-section sector whose inner angle is less than 180°.

Abstract: A shut-off instrument for a flow medium, in particular a slide valve instrument designed for pressurization on both sides with an instrument housing forming a flow channel and a slide valve chamber and with a soft-sealing shut-off element closing off the flow channel and with a slide valve stem which penetrates a seal arrangement and/or bearing arrangement in a housing neck extension delimiting the slide valve chamber and which is rotationally connected to a stem nut coupled to the shut-off element by a screw contact. The shut-off element is designed to include more than one part and at least one external dimension of the main body is slightly smaller than a nominal width of the flow channel and seal elements are arranged on opposite support surfaces of the main body via an engaged connection projecting over the external dimension with a peripheral edge collar.

Abstract: A shut-off instrument for a flow medium, in particular a slide valve instrument designed for pressurization on both sides with an instrument housing forming a flow channel and a slide valve chamber and with a soft-sealing shut-off element closing off the flow channel and with a slide valve stem which penetrates a seal arrangement and/or bearing arrangement in a housing neck extension delimiting the slide valve chamber and which is rotationally connected to a stem nut coupled to the shut-off element by a screw contact. The shut-of element is designed to include more than one part and at least one external dimension of the main body is slightly smaller than a nominal width of the flow channel and seal elements are arranged on opposite support surfaces of the main body via an engaged connection projecting over the external dimension with a peripheral edge collar.