Abstract: A liquid flow device includes filter tubes which act as reverse osmosis tubes, ultrafiltration tubes or microfiltration tubes. The device also includes a stack of discs having apertures defining a plurality of elongated passages; an end disc provided at each end of the stack of discs; and a membrane tube provided in each elongated passage and projecting at opposite open ends through and beyond the end discs. A liquid inlet feeds liquid into the interior of at least one membrane tube; and a liquid outlet withdraws liquid from inside the membrane tubes. Tubular interconnector members are provided at both open ends of at least two of the membrane tubes for interconnecting the open ends of the various membrane tubes at both ends.

Abstract: A liquid filter device has a housing and a multiple of closely spaced discs provided in the housing, the discs having holes which are adapted to be in alignment so as to define at least one elongated passage. The discs have separating means separating the discs from each other so as to provide a flow gap between adjacent discs. A filter tube is provided in each elongated passage. A fluid inlet leads into the housing to provide fluid into the interior of at least one filter tube, and a fluid outlet leads from the housing to withdraw fluid, which has passed through the filter tubes and into the flow gap between the discs. Interconnection means interconnect the ends of the filter tubes, and a resin casting surrounds the interconnection means.