Patent ID: 6235192
Filing Date: 2001-05-22
Classification: B01D,F25B,Y10T

Abstract:
A bidirectional filter drier, comprising:a casing having opposed ends;end caps at said opposed ends,a flow port in each of said end caps,first and second check valve assemblies supported in said casing at said opposed ends, anda molded desiccant core centrally supported by said valve assemblies, each of said check valve assemblies including a first valve to allow fluid to flow from a respective flow port in an adjacent end cap around the periphery of the desiccant core and radially inward toward the center of the core, and a second valve to allow fluid to flow axially outward from the center of the desiccant core to the flow port in the adjacent end cap, andan outer filter media layer surrounding said desiccant core and extending between said valve assemblies to separate particles in the fluid passing radially inward through the desiccant core, said outer filter media arranged to allow a portion of fluid passing therein to bypass the desiccant core, said outer filter layer having a filtration efficiency at least as great as the desiccant core.