Abstract: A butterfly valve with a valve disk mounted to swivel about an axis of rotation inside a housing and torsionally rigidly connected to a drive shaft pivotably mounted inside the housing. To ensure a connection which, from the standpoint of production engineering, is simple, yet secure, the valve disk is torsionally rigidly connected to the drive shaft by means of a minimum of two tapered pins engaging opposite sides of the drive shaft.

Abstract: A venting and/or bleeding valve with a valve housing, a main valve arranged in the valve housing for rapid venting and bleeding of piping connected to the valve housing, an auxiliary valve arranged in the valve housing for operating ventilation of the piping at operating pressure, and a float arranged within the valve housing and controlling the main valve and the auxiliary valve as a function of the filling level of a fluid located in the valve housing. The venting and/or bleeding valve contains a valve position sensor for acquisition of the position of the main valve, at least one additional sensor for acquisition of the humidity and/or the pressure and/or of the temperature in an interior space of the valve housing, and an evaluation unit for acquisition of an operating state of the venting and/or bleeding valve as a function of the values acquired by the valve position sensor and any additional sensor.

Abstract: A control cylinder for a control valve, the control cylinder including a main body having through-openings. To optimize the flow and to reduce cavitation, the through-openings have an inside wall with a curved, oblique or conical profile and/or with edges and/or undercuts.

Abstract: A control or shutoff valve with a housing includes a valve seat arranged within housing between feed and a discharge, and a shutoff element arranged to be moveable relative to the valve seat in the housing. At least one feed channel leading to the valve seat is arranged in the housing to supply a pressure medium to reduce cavitation phenomena.

Abstract: A shut-off valve housing having a through-channel extending inside a main body between an inlet opening and an outlet opening, and a valve seat disposed inside the through-channel. To reduce flow losses, an outflow region of the through-channel immediately downstream of the valve seat on an outflow side has an inwardly curved contour.

Abstract: A butterfly valve with a valve disk mounted to swivel about an axis of rotation inside a housing and torsionally rigidly connected to a drive shaft pivotably mounted inside the housing. To ensure a connection which, from the standpoint of production engineering, is simple, yet secure, the valve disk is torsionally rigidly connected to the drive shaft by means of a minimum of two tapered pins engaging opposite sides of the drive shaft.

Abstract: A valve disk with a disk-like valve body, which has a front with two protruding hubs and a back opposite the front. In order to permit improved flow around the valve disk and reduction of eddies on the outflow side, arc-like recesses running along an inside surface of both hubs are arranged on the front of valve body to deflect the flow around hubs.

Abstract: A gate valve includes a valve plate located in a movable manner within a holder, a sealing for sealing off of the valve plate relative to the holder, and a wedge arrangement with several first wedge elements located on the valve plate in its direction of movement at a distance from one another, and second wedge elements belonging to the first wedge elements, by means of which the valve plate is pressed transverse to the direction of movement of the valve plate against the sealing with a movement into a closing position. In order to facilitate a low-friction actuation with a reduced actuation force, also in a compact and space-saving manner, the second wedge elements are supported on the holder, so that they can move relative to the holder.