| 摘要 |
PURPOSE: A filtration apparatus is provided which has a sealing portion superior in durability as it can dispense with an O ring providing a seal for attaching a housing bowl and it can also be free from particles and the like otherwise introduced when a cartridge filter is exchanged or on other occasions. CONSTITUTION: The filtration apparatus comprises a housing head (10) having an inlet (14) and an outlet (15); a housing bowl (11) detachably attached to the housing head and surrounding a cartridge filter (1) to define a channel wall; and clamping means (12) exerting force to press the housing head and the housing bowl against each other to clamp the housing head and the housing bowl together, wherein the housing head has a portion facing the housing bowl and having a sealing portion, and the housing bowl has a sealing portion providing a seal when the clamping means exerts force to allow the sealing portion (31) of the housing bowl to abut directly against the sealing portion of the housing head, each of the sealing portion (32) of the housing head and the sealing portion (31) of the housing bowl are extended in a form of a ring, one a protrusion and the other a recess abutting against the protrusion, and wherein the seal is at least two circular seals, when the recess and the protrusion are pressed against each other the recess is increased in width elastically and has resilience allowing the recess to cooperate with the protrusion to provide the seal, one of the sealing portions of the housing head and bowl is a protrusion and the other is a surface receiving the protrusion pressed there against to elastically deform and thus allow the receiving surface to cooperate with the protrusion to provide a seal, the receiving surface is recessed, and the housing head, the cartridge filter, or the housing bowl is formed of fluororesin.
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