Tuchenhagen Gmbh

Gea Tuchenhagen Gmbh

Werner Schmid

Martin Sauer

Herbert Robert Coura

Willi Wiedenmann

Markus Pawlik

Gundar Scholz

Holger Wengert

Wolfgang Rauen

The invention relates to an operating device for a rotatable closing element of a valve such that, a desired angle of rotation can easily be set and maintained. This is achieved in that two guide grooves ( ), which are incorporated diametrically opposite each other, are bounded on all sides by a piston shank ( ), in that their respective courses are precisely or more or less symmetrical at all points, in that in each instance the courses have, in relation to the axis of the piston ( ), a greater pitch angle in a central portion (angle b) than in their two portions on the end side (angle a) (a>b), and in that the stroke of the piston ( ) is limited on one side by application of the front-end piston shank ( ) to the cover element ( ) and on the other side by application of a piston base ( ) to a stop element ( ) which is mounted in the housing base ( ) of the housing ( )

Operating device for a rotatable closing element of a valve

The invention relates to a bellows to seal a valve rod passage in a lifting valve, specifically formed as an expansion bellows or corrugated tube, which ensures a reliable, hygienically proper and durable static sealing of the connecting flange of a closing-member unit in the box of the lifting valve under the occurring forces at an adequately long service life. This is achieved by the fact that the connecting flange (,) of the closing-member unit (,), in the region where it is connected to the bellows (,), has a fastening component (,) indirectly supported on the box side to absorb, in a way free from bending moments to a very large extent, the forces resulting from the valve-lift induced deformation of the bellows (,) and/or the respective pressure in the box (,) and is reduced, in the area of its conical sealing surface (,), to a minimal wall thickness meeting the strength-related requirements, in the form of a diaphragm-shaped sealing element (,), and that the diaphragm-shaped sealing element (,), on its side facing away from the conical scaling surface (,) has at least one biased elastic thrust ring (,) which presses the sealing surface (,) onto the complementary annular seating surface (,).

Bellows for sealing a valve rod passage in a globe valve

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Heidenheim, Germany

Werner Schmid