Abstract: The invention relates to a centrifugal pump assembly with at least one impeller, with a suction union, which is situated on the entry side of the impeller, and with a pressure union, which is situated on the exit side of the impeller. A flow sensor and at least one guidance element are arranged in a conduit section, which is formed by the suction union and/or by the pressure union. The guidance element is suitable for influencing the flow prevailing in the conduit section.

Abstract: An immersion motor includes a housing (3) having a wall (4) with a watertight cable penetration (5, 6; 5, 6?). The cable penetration includes an inlet (5) in the wall (4) for a cable (25) and a sealing collar (6; 6?) that can be released from the inlet (5) having a penetration (20) for the cable (25). The sealing collar (6; 6?) includes a first seal (45; 45?) disposed on the penetration (20) and means for applying force (75, 85, 90) to the first seal (45; 45?), which is designed for permanently applying force to the first seal (45; 45?) radially in the penetration (20). The cable penetration (5, 6; 5, 6?) further includes means for releasably attaching (35, 40) the sealing collar (6; 6?) to the inlet (5). At least one second seal (120, 125) is provided between the sealing collar (6; 6?) and the inlet (5).

Abstract: The invention relates to a forward osmosis (FO) device (10) with a semipermeable membrane (5, 5a) capable of performing forward osmosis between a first (F1) and a second fluid (F2). In a first fluid confinement (4a), a first swirl generator (7a) is positioned and in a second fluid confinement (4b) positioned on the other second side of the membrane, a second swirl generator (7b) is positioned. The swirl generators are arranged to create a circular flow pattern (S2, S3) for the first and the second fluid, respectively, wherein the first (7a) and second (7b) swirl generator, upon engagement, are arranged to create a circular flow pattern for the first and the second fluid, respectively, by rotating motion (RA1, RA2). The invention is advantageous by obtaining FO device that is capable of reducing the concentration polarization (CP) near the membrane by creating a cross flow velocity over the membrane and facilitate control of the cross flow velocity independent of the through flow of the membrane.

Abstract: The filter device is provided with a housing (1) and with a stack of filter plates (10, 11) arranged therein at a spacing from one another. The housing includes an inlet (7) for the fluid to be filtered, an outlet (9) for the filtrate which is connected in a conducting manner to the inside of the filter plates (10, 11), and a cavity extending through the stack and formed by recesses in the filter plates (10, 11). The filter plate stack is arranged fixed to the housing, and a centrifugal pump (14) with several impellers (15) is arranged within the filter plate stack. This pump ensures an intensive through-flow of the filter plate stack and thus a removal of the filter residues.

Abstract: An impeller is provided for a pump unit, in particular for a waste water pump unit, having two cover plates (2, 4), which are spaced apart from one another in the axial direction (X) and are connected to one another by at least one connecting element (8). The impeller has at least one blade (12, 14) which is arranged between the two cover plates (2, 4) and extends from an inner diameter of the impeller to an outer diameter of the impeller. The blade (12, 14) has a continuous slot (16), which extends from the edge (22, 24) of the blade (12, 14) which is situated at the inner diameter to the edge (26, 28) of the blade (12, 14) which is situated at the outer diameter. A pump unit is also provided having an impeller of this type.

Abstract: A method is used to determine the viscosity of a fluid. The method includes arranging a body (11) in a fluid-leading channel, with which vortices form in the flow direction (10) therebehind, which are detected with regard to measurement technology. Also, the flow speed in the channel, at which vortices arise for the first time or barely just continue to exist, is determined, and this speed is used as a measure for the viscosity of the through-flowing fluid.

Abstract: The present invention relates to a fluid processing unit through which fluid may flow while being processed. The fluid processing unit comprises a casing and one or more cassettes each comprising an outer housing being arranged so that the outer housing forms at least a part of the casing and each comprising a flow passage through the cassette. At least one of the cassettes comprises at least one fluid interaction component or is adapted to receive at least one fluid interaction component. The fluid processing unit comprises total pressure increasing means for at least partially overcoming the pressure loss due to the fluid flowing through the unit, the total pressure increasing means and one, more or all of the one or more fluid interaction components being encapsulated by the casing.

Abstract: An impeller for a pump used for pumping liquid substances, such as waste water, said impeller containing at least one flow channel of a spatially curved shape, wherein the flow channel is of an evenly curved shape and, in the final portion of the channel, the flow channel meets itself, or another channel if the impeller has more than one flow channel. By using the impeller of the invention, a very high efficiency is achieved.