Abstract: A method of vacuum membrane filtration including placing a membrane filter between a filtration base and a pouring funnel, an upper side of the filtration base having a membrane bearing area with a bearing structure and a supporting contour surrounding the bearing structure and the supporting contour having at least one notch in flow connection with a bottom side of the membrane bearing area, detachably mounting the pouring funnel on the filtration base thereby clamping the membrane filter between the filtration base and the pouring funnel, applying suction to the filtration base such that the membrane filter is pulled against the bearing structure and comes into contact with the supporting contour, and dismounting the pouring funnel from the filtration base while still applying the suction, causing an outer rim of the membrane filter to bulge upward from the supporting contour and uncover the at least one notch.

Abstract: A method of vacuum membrane filtration including placing a membrane filter between a filtration base and a pouring funnel, an upper side of the filtration base having a membrane bearing area with a bearing structure and a supporting contour surrounding the bearing structure and the supporting contour having at least one notch in flow connection with a bottom side of the membrane bearing area, detachably mounting the pouring funnel on the filtration base thereby clamping the membrane filter between the filtration base and the pouring funnel, applying suction to the filtration base such that the membrane filter is pulled against the bearing structure and comes into contact with the supporting contour, and dismounting the pouring funnel from the filtration base while still applying the suction, causing an outer rim of the membrane filter to bulge upward from the supporting contour and uncover the at least one notch.

Abstract: A connection mechanism for a suction device for vacuum membrane filtration applications, includes a support for receiving a membrane filter or a filtration base, a cavity formed below the membrane filter or the filtration base, a suction duct which opens centrally into the cavity, and a ventilation duct which opens laterally into the cavity. The connection mechanism further includes a closing element which can be moved into several switching positions and which can block or unblock both the suction duct and the ventilation duct depending on the switching positions.

Abstract: A filtration base for vacuum membrane filtration applications comprises a membrane bearing area on the upper side of the filtration base, which has a bearing structure and a supporting contour surrounding the bearing structure for a membrane filter placed in the membrane bearing area. The supporting contour has at least one notch which is in flow connection with the bottom side of the membrane bearing area and which is arranged such that it is adapted to be selectively covered by a membrane filter placed in the membrane bearing area.

Abstract: A connection mechanism for a suction device for vacuum membrane filtration applications, includes a support for receiving a membrane filter or a filtration base, a cavity formed below the membrane filter or the filtration base, a suction duct which opens centrally into the cavity, and a ventilation duct which opens laterally into the cavity. The connection mechanism further includes a closing element which can be moved into several switching positions and which can block or unblock both the suction duct and the ventilation duct depending on the switching positions.

Abstract: A container has an outflow arranged in the vicinity of the bottom and a vortex breaker mounted upstream from the outflow for preventing foaming. The vortex breaker has a vertical main wall and two vertical side wings oriented away from one another to define a T-shape. The main wall merges into a fixing arm. A method also is provided for producing the vortex breaker. The method includes a) cutting a flat plate to define a main wall, two side wings, and a fixing arm connected to the main wall; and b) folding out the side wings in opposing directions in each case into a final position arranged transverse to the main wall. The vortex breaker is applicable in chemistry, biotechnology, and filtration technology.

Abstract: A container has an outflow arranged in the vicinity of the bottom and a vortex breaker mounted upstream from the outflow for preventing foaming. The vortex breaker has a vertical main wall and two vertical side wings oriented away from one another to define a T-shape. The main wall merges into a fixing arm. A method also is provided for producing the vortex breaker. The method includes a) cutting a flat plate to define a main wall, two side wings, and a fixing arm connected to the main wall; and b) folding out the side wings in opposing directions in each case into a final position arranged transverse to the main wall. The vortex breaker is applicable in chemistry, biotechnology, and filtration technology.

Abstract: An adapter is provided for fastening a filter element in a cylindrical receiving opening of a bottom part of a lower piece of a filter housing. The adapter has at least one seal arranged in a peripheral groove on the circumference of the adapter to permit fluid-tight separation of a non-filtrate chamber, which surrounds the external jacket of the filter and from which medium to be filtered can be delivered to the filter, from a filtrate chamber into which the filtrate can be introduced from the filter. The seal is connected by injection molding to a base surface of the peripheral groove and is at a distance from at least one side wall delimiting the base surface of the groove.

Abstract: An adapter is provided for fastening a filter element in a cylindrical receiving opening of a bottom part of a lower piece of a filter housing. The adapter has at least one seal arranged in a peripheral groove on the circumference of the adapter to permit fluid-tight separation of a non-filtrate chamber, which surrounds the external jacket of the filter and from which medium to be filtered can be delivered to the filter, from a filtrate chamber into which the filtrate can be introduced from the filter. The seal is connected by injection molding to a base surface of the peripheral groove and is at a distance from at least one side wall delimiting the base surface of the groove.

Abstract: An improvement in the fabrication and bonding of dead-end and cross-flow thermoplastic filtration modules is disclosed whereby two housing parts are bonded to each other and to a filtration membrane by an L-shaped plastic melt.