A filter device having filter means, in particular hollow fiber membranes,
arranged in more than one filtration compartment within a filter housing.
The filter device thereby allows more than one filtration process to be
carried out serially and/or simultaneously within a single housing. For
example a dialysis type filtration process such as hemofiltration or
hemodiafiltration or hemodialysis may be carried out at the same time as
an ultrafiltration process or as another hemofiltration,
hemodiafiltration or hemodialysis process. The device may haves a split
shell construction bonded or welded together along longitudinal seams.
Internal separating walls within the housing are formed integrally with
the shell portions of the housing to form adjacent filtration
compartments when the housing portions are joined together.
