Abstract: A bag-type filter adapted for use with a basket filter assembly. The basket assembly is removably supported within a filter vessel and includes an outer, permeable member and an inner, permeable member having a diameter which is less than the diameter of the outer, permeable member such that the inner, permeable member is received with in the outer, permeable member so as to define an annular space therebetween and an inner flow path. The bag-type filter is supported by the basket assembly over both the inner and outer permeable members bounding the annular space therebetween. The bag-type filter includes a first portion having a first, larger diameter and a second portion having a second, reduced diameter. A transition portion is disposed between the first and second portions of the bag-type filter.

Abstract: A filter assembly including a filter vessel having an inlet and an outlet and defining a filter chamber therebetween. A basket assembly is removably supported within the filter chamber. The basket assembly has a diameter less than the diameter of the filter chamber so as to define an annular flow passage about the basket assembly. The basket assembly includes an outer permeable member and an inner permeable member having a diameter which is less than the diameter of the outer permeable member such that the inner permeable member is received within the outer permeable member so as to define an annular space therebetween and an inner flow path. The inner permeable member includes a permeable rigid closed end. The basket assembly is capable of supporting a bag type filter having at least one closed end such that it may be supported over both the inner and outer permeable members bounding the annular space therebetween.

Abstract: A filter assembly includes a filter vessel having an inlet, an outlet, and defining a filter chamber therebetween. A basket assembly is removably supported within said filter chamber and has a diameter less than the diameter of the filter chamber so as to define an annular flow path about the basket assembly. The basket assembly includes an outer, permeable member and an inner, permeable member having a diameter which is less than the diameter of the outer, permeable member such that the inner, permeable member is received with in the outer, permeable member so as to define an annular space therebetween and an inner flow path. The basket assembly supports a bag-type filter over both the inner and outer permeable members bounding the annular space therebetween. The bag-type filter includes a first portion having a first, larger diameter and a second portion having a second, reduced diameter. A transition portion is disposed between the first and second portions of the bag-type filter.

Abstract: A liquid deionizing twin bed apparatus of the type used in conjunction with a pressure vessel having an inlet for receiving untreated ionized liquid and an outlet through which the treated deionized liquid exits the vessel. The apparatus is comprised of at least one liquid permeable container having an anionic exchanger bed containing materials adapted to absorb one type of charged particle from the fluid and also having a cationic exchanger bed containing materials to absorb oppositely charged particles from the liquid flowing therethrough. The anionic and cationic beds are positioned in series in the liquid permeable container relative to fluid flow therethrough and the liquid permeable container is adapted to be removably housed within the vessel for removing spent anionic and cationic materials and replacing spent anionic and cationic materials by inserting a new liquid permeable container having unspent anionic and cationic materials into the vessel.