Patent ID: 8388842

Claim:
A filtration device ( 10 ) comprising: a tubular pressure vessel ( 12 ); a tubular filter assembly ( 14 ) housed within the tubular pressure vessel, the tubular filter assembly having: a filter element ( 15 ), and a brine seal ( 16 , 116 , 216 ) assembled to an end of the tubular filter assembly and extending radially beyond an outermost surface of the filter element, wherein the brine seal comprises an annular body ( 28 ) having a split therein such that the annular body has a first end ( 34 , 134 ) and a second end ( 36 , 136 ) opposite the first end, the first and second ends being mutually engageable with each other to form a split ring seal which is movable between a first position having a first diameter and a second position having a second diameter, and wherein the split ring seal is formed from a polymer which is sufficiently rigid to retain its annular shape and sufficiently resilient to allow the split ring seal to flex for assembly by collapsing about a circumference of the tubular filter assembly and biased to spring radially outwardly to fill an annular gap between the tubular filter assembly and the tubular pressure vessel.