Filter device
AssigneeHydac Process Technology GmbH
InventorsNorbert Lang, Jürgen Hausdorf, Ralf Wnuk
Life of this patent
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Abstract
A filter device includes a filter housing (10), a filter inlet (12), a filter outlet (14), and a filter element (16). The filter element divides a filter area (18) into two partial areas (20, 22). One partial filter areas is conical in form with the cross-section of that partial area (20) being tapered from the filter inlet (12) to the filter outlet (14). The partial areas are separated from each other by the filter element. This arrangement results in an optimum residence time distribution inside the filter device at a uniform flow rate, which is particularly useful for highly viscous fluids such as polymer melts or similar.
Claims22
A filter device comprising:
- a filter housing with a filter inlet and a filter outlet at opposite ends thereof and with an inside filter space;
- and
- a conical filter element subdividing said filter space into first and second subspaces arranged sequentially from said filter inlet to said filter outlet, said first subspace tapering conically in transverse cross-section from said filter inlet to said filter outlet, said second subspace widening conically in transverse cross-section from said filter inlet to said filter outlet to provide a uniform flow rate in said first and second subspaces, said subspaces having respective conicities proceeding constantly in opposite directions, tapering of said first subspace and widening of said second subspace occurring to substantially equal extents in that said first subspace extends outwardly and the second subspace extends toward a center of said filter housing with each subspace being bounded opposite said filter element by a cylindrical wall, said filter element narrowing conically from said filter outlet toward said filter inlet.
A filter device, comprising:
- a filter housing with a filter inlet and a filter outlet at opposite ends thereof and with an inside filter space;
- and
- a conical filter element subdividing said filter space into first and second subspaces arranged sequentially from said filter inlet to said filter outlet, said first subspace tapering conically in transverse cross-section from said filter inlet to said filter outlet, said second subspace widening conically in transverse cross-section from said filter inlet to said filter outlet for a uniform rate of flow therein to optimize dwell time distribution over said filter element, said subspaces having respective conicities proceeding constantly in opposite directions, tapering of said first subspace and widening of said second subspace occurring to equal extents in that said first subspace extends outwardly and the second subspace extends toward a center of said filter housing with each subspace being bounded opposite said filter element by a cylindrical wall, said filter element narrowing conically from said filter outlet toward said filter inlet.
Dependencies are inferred from the claim text.