| 摘要 |
A filter arrangement which is employed in a fluid conduit is formed of a filter formed of a permeable filter material connected to a flange seal having an annular portion for engaging with and coupling to the permeable filter medium, and a planar portion for forming a seal which prevents leakage at a flange-type coupler. The planar and annular portions of the flange seal are formed of teflon, as is the filter itself, which may be formed of multiple layers of teflon fabric or filter material, each having a respective filter permeability characteristic. The filter is coupled to the annular portion of the flange seal by a thread which is sewn through the various layers of the filter medium and the annular portion of the flange seal. The thread may itself be formed of teflon, such that the entire filter arrangement is formed of teflon and will resist corrosion. Collapse of the filter is prevented by a rigid tubular support which has apertures therethrough to facilitate flow of the fluid. The rigid support is prevented from being driven from within the filter, and the filter becoming inverted, by operation of a tube sheet installed at a flange coupler of the fluid conduit, and which has a smaller aperture therethrough than the tubular support member.
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