Distribution plate for crossflow filtration cassettes

1. A distribution plate for supplying crossflow filtration cassettes, the plate comprising a front surface and a rear surface, two opposite end walls, two opposite side walls, a feed channel in fluid communication with a feed inlet port and with a plurality of feed apertures which open into the front surface; a retentate channel in fluid communication with a retentate outlet port, and with a plurality of retentate apertures which open into the front surface; and a permeate channel in fluid communication with two permeate outlet ports located on opposite end walls and with a plurality of permeate apertures which open into the front surface;

wherein said feed channel, said retentate channel and said permeate channel extend in a direction essentially parallel with one or both side walls;

wherein the distribution plate is upstanding with said front surface, said rear surface and side walls vertically oriented;

wherein said feed apertures are aligned along a first straight line on the front surface, said retentate apertures are aligned along a second straight line on the front surface;

wherein said permeate apertures are aligned along at least one of the first and the second straight lines; and

the plate further comprising a plurality of permeate connector channels, each permeate connector channel extending inside the plate from a region of the permeate channel adjacent the permeate outlet ports to one of the plurality of permeate apertures, wherein said permeate connector channels provide fluidic communication between the permeate apertures and the permeate channel.

2. The distribution plate of claim 1 , wherein said feed inlet port, said retentate outlet port and said permeate outlet ports are located on the end walls.

3. The distribution plate of claim 1 , wherein the permeate connector channels are acutely angled towards the permeate channel.

4. The distribution plate of claim 1 , wherein said permeate connector channels each comprise two legs: an aperture leg essentially perpendicular to the front surface and ending in one of said plurality of permeate apertures, and a connector leg, connecting the aperture leg with the permeate channel.

5. The distribution plate of claim 1 , wherein said permeate apertures are circular.

6. The distribution plate of claim 1 , wherein said feed channel, said retentate channel, said permeate channel and said permeate connector channels have essentially circular cross sections or are composed of segments having essentially circular cross sections.

7. The distribution plate of claim 1 , wherein said feed channel, said retentate channel, said permeate channel and said first and second straight lines are essentially parallel.

8. The distribution plate of claim 1 , wherein said feed apertures, said retentate apertures and said permeate apertures are all located on the front surface.

9. The distribution plate of claim 1 , wherein the front surface and the rear surface are planar and parallel and wherein said feed apertures, said retentate apertures and said permeate apertures are located on both the front and the rear surfaces.

10. The distribution plate of claim 1 , wherein the region of the permeate channel is located within a distance of two permeate channel diameters from the end walls.

11. The distribution plate of claim 1 , wherein the angle between each permeate connector channel and the permeate channel is 20-80 degrees.