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A filter arrangement including a venturi element carried within a tubular filter by a flexible attachment ring at one end of the filter removably securing the filter in the aperture of an apertured plate member in a gas filtration system. The outermost diameter of the venturi element is slightly les

A filter arrangement including a venturi element carried within a tubular filter by a flexible attachment ring at one end of the filter removably securing the filter in the aperture of an apertured plate member in a gas filtration system. The outermost diameter of the venturi element is slightly less than the diameter of the aperture to accommodate withdrawal of the venturi element from either side of the plate attendant to installation and removal of the filter arrangement.

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For a bag house including a plenum having an apertured bag support plate including an aperture of a predetermined diameter, a filter arrangement adapted to be connected with the plate in flow-through communication with the plenum through the plate aperture, comprising: a tubular filter having a flex

For a bag house including a plenum having an apertured bag support plate including an aperture of a predetermined diameter, a filter arrangement adapted to be connected with the plate in flow-through communication with the plenum through the plate aperture, comprising: a tubular filter having a flexible end portion; a flexible ring member connected with said flexible end portion, said ring member removably embracing the marginal edge of the plate aperture to secure the ring member and the filter to the plate; a venturi element extending through said ring member into the interior of the filter; said venturi element including an inwardly recessed throat portion, an outwardly protruding annular shoulder proximate one end of said throat portion, and an attachment portion spaced from said shoulder within the filter; said annular shoulder axially overlying the ring member and being carried thereby to support the venturi element within the filter, the outermost diameter of said shoulder being less than the diameter of the plate aperture to accommodate withdrawal of the venturi element from either side of the plate upon removal of the ring member; said throat portion accommodating manipulative flexure of said ring member upon selective axial displacement of the venturi element with respect to the plate attendant to installation and removal of the filter arrangement; filter support means carried by said attachment portion within the filter; and said venturi element being of an elongated tubular configuration having axially outwardly flared end portions, one of said end portions providing said annular shoulder and the other of said end portions providing said attachment portion.