Multiple plate ultrafilter
 An ultra-filter comprising a stack of alternating feed fluid conducting cells and permeate fluid conducting cells separated by semipermeable membranes. The feed cells comprise two facing gaskets which are separable to permit cleaning their interface area. The membranes are on the non-interfacing surfaces of the feed cell gaskets. Isolated passages extend through the stack for introducing feed solution to the cells and for discharging permeate solution and a residual portion of the feed solution. Planar flow passages connect the isolated passages by means of cutout portions in the feed and permeate cells. The permeate cells include a solid back-up sheet and a porous element is interposed between the back-up sheet and the adjacent membrane to support the membrane against excessive distention by pressurized feed solution. The filter stack is sealed by compression between end plates. Alignment pins extend through the stack to maintain the relative position of the components during disassembly and reassembly. 
Aqua-Chem, Inc.
B
B01D
inventional
Donald G. J.
Wang