Abstract: The invention pertains to a method for stabilizing stucco wherein a fresh stucco is provided; water is added to the fresh stucco to obtain moistened stucco, and the moistened stucco is maintained at a temperature of at least 30° C. for a time interval of at least 30 minutes to obtain a stabilized stucco. The process allows inter alia for an easy adjustment of the activity of the stabilized stucco, which is useful to e.g. adjust setting time of a corresponding stucco slurry. The invention further pertains to a method for producing gypsum plasterboards, wherein a stabilized stucco obtained with the above method is used.

Abstract: The invention relates to a conveyor line for the continuous production of drywall boards as well as a slurry distributing device which is used in this conveyor line. The distributing device is used for the uniform and low-speed flow distribution of slurries.

Abstract: The invention relates to an air guidance unit comprising an air guidance housing and a fan assembly that can be detachably connected thereto. In order to allow an efficient and time-saving maintenance of such an air guidance unit, it is provided according to the invention that the air guidance housing comprises one or more blocking studs, that the fan assembly comprises closure receptions each having a blocking section into which the blocking stud can be swiveled, and that a detachable locking piece immobilizes the fan assembly in the mounting position of the fan assembly.

Abstract: The invention relates to an air guidance system having an air guidance housing and an air passage grating fastened thereto, the air passage grating being held on the air guidance housing by means of a snap-lock connection. In order to simplify maintenance of such an air guidance system it is provided according to the invention that the air passage grating carries at least one latch having a snap-in shoulder that can be engaged in a snap-lock seat of the air passage grating and that the air passage grating pivotally accommodates a handle in a bearing seat, said handle disengaging the latch from the snap-lock seat when set from the locking position to the unlocking position.

Abstract: The invention relates to a filter unit for a switchgear cabinet, comprising a filter housing having an air passage that can be covered by an air passage grating at least to some extent. To allow such a filter unit to be maintenanced easily, it provided according to the invention that the air passage grating is hinged indirectly or directly to the filter housing and can be adjusted between a closed position and an opened maintenance position. The filter housing has a retainer which positively blocks a catch of the air passage grating in the maintenance position.

Abstract: The invention relates to a fan-and-filter unit to be mounted in the wall of a switch cabinet or housing, and includes a fan unit inserted in a fan housing, a filter mat arrangement mounted upstream of the fan unit and a fan cover immobilizing the filter mat. An embodiment advantageous for operation of the fan-and-filter unit may be provided where the fan-and-filter unit has a filter mat monitoring unit which is designed to detect the service life and/or a degree of soiling of the filter mat arrangement and which includes an insert integrated into the fan housing or the fan cover and having an illuminated display visible from the exterior of the fan cover facing away from the fan unit and being designed to display at least exceeding of a predetermined or predeterminable service life and/or a predetermined or predeterminable degree of soiling.

Abstract: The invention relates to a cover for at least one air-conditioning device arranged on a cladding element, in particular of a switchgear cabinet. The cover has a cover housing having a front wall and side parts connected thereto. The side parts keep the front wall at a distance from the cladding element. At least one holder for the cover housing is fitted to the cladding element. According to the invention, the holder comprises vertical hook elements into which the cover housing can be suspended by hook receptacles in the direction of gravity.

Abstract: The invention relates to an air guidance unit comprising an air guidance housing and a fan assembly that can be detachably connected thereto. In order to allow an efficient and time-saving maintenance of such an air guidance unit, it is provided according to the invention that the air guidance housing comprises one or more blocking studs, that the fan assembly comprises closure receptions each having a blocking section into which the blocking stud can be swiveled, and that a detachable locking piece immobilizes the fan assembly in the mounting position of the fan assembly.

Abstract: To allow such a filter unit to be maintenanced easily, it provided according to the invention that the air passage grating is hinged indirectly or directly to the filter housing and can be adjusted between a closed position and an opened maintenance position. The filter housing has a retainer which positively blocks a catch of the air passage grating in the maintenance position.

Abstract: The invention relates to a fan-and-filter unit to be mounted in the wall off a switch cabinet or housing, comprising a fan unit inserted in a fan housing, a filter mat arrangement mounted upstream of the fan unit and a fan cover immobilizing the filter mat. An embodiment advantageous for operation of the fan-and-filter unit consists in that the fan-and-filter unit has a filter mat monitoring unit which is designed to detect the service life and/or a degree of soiling of the filter mat arrangement and which comprises an insert integrated into the fan housing or the fan cover and having an illuminated display visible from the exterior of the fan cover facing away from the fan unit and being designed to display at least exceeding of a predetermined or predeterminable service life and/or a predetermined or predeterminable degree of soiling.

Abstract: The invention relates to a cover for at least one air-conditioning device arranged on a cladding element, in particular of a switchgear cabinet. The cover has a cover housing having a front wall and side parts connected thereto. The side parts keep the front wall at a distance from the cladding element. At least one holder for the cover housing is fitted to the cladding element. According to the invention, the holder comprises vertical hook elements into which the cover housing can be suspended by hook receptacles in the direction of gravity.

Abstract: The invention relates to a louvered grille for an air conduction housing, comprising a plurality of louvers which are spaced apart from one another to form air passage openings, wherein the louvers extend in the widthwise direction of the louvered grille and have an upper louver face that is directed to the exterior and inclined transversely with respect to the vertical direction of the louvered grille. For better IP protection of such a louvered grille, according to the invention the upper louver face of at least some of the louvers has a convex curvature in at least some areas of the louvers, both in the widthwise direction of the louvered grill and in the vertical direction of the louvered grille.

Abstract: The invention relates to an air guidance system having an air guidance housing and an air passage grating fastened thereto, the air passage grating being held on the air guidance housing by means of a snap-lock connection. In order to simplify maintenance of such an air guidance system it is provided according to the invention that the air passage grating carries at least one latch having a snap-in shoulder that can be engaged in a snap-lock seat of the air passage grating and that the air passage grating pivotally accommodates a handle in a bearing seat, said handle disengaging the latch from the snap-lock seat when set from the locking position to the unlocking position.

Abstract: A device for fixing and sealing a replaceable heat-exchanger cassette in an air/air heat exchanger, wherein two spatially separated conducting areas are formed by separating strips and the heat exchanger cassette. In this case a releasable and satisfactory sealing support of the heat exchanger cassette is achieved because in the area of its separating strips the air/air heat exchanger has sealing receivers. The heat exchanger cassette rests against the sealing receivers by sealing faces. The air/air heat exchanger has at least one movable slide which maintains the heat exchanger cassette in the sealing receivers under prestress.

Abstract: A device for fixing and sealing a replaceable heat-exchanger cassette in an air/air heat exchanger, wherein two spatially separated conducting areas are formed by separating strips and the heat exchanger cassette. In this case a releasable and satisfactory sealing support of the heat exchanger cassette is achieved because in the area of its separating strips the air/air heat exchanger has sealing receivers. The heat exchanger cassette rests against the sealing receivers by sealing faces. The air/air heat exchanger has at least one movable slide which maintains the heat exchanger cassette in the sealing receivers under prestress.