An aeration diffuser (12) for a pressurized liquid treatment module includes a base having a gas passageway (32) and a liquid passageway (50) fluidically separated from the gas passageway. Liquid is injectable into the liquid passageway of the base of the diffuser. Liquid flows through the base of the diffuser and into the module to be filtered by filtration membrane(s) within the module. Gas is injectable into the gas passageway of the base of the diffuser. Gas flowes through the base of the diffuser separately from the liquid to aerate the filtration membrane(s) within the module. Further a module including one or more diffusers and a method of filtration is disclosed.

An aeration diffuser (12) for a pressurized liquid treatment module includes a base having a gas passageway (32) and a liquid passageway (50) fluidically separated from the gas passageway. Liquid is injectable into the liquid passageway of the base of the diffuser. Liquid flows through the base of the diffuser and into the module to be filtered by filtration membrane(s) within the module. Gas is injectable into the gas passageway of the base of the diffuser. Gas flowes through the base of the diffuser separately from the liquid to aerate the filtration membrane(s) within the module. Further a module including one or more diffusers and a method of filtration is disclosed.

A toilet device for a rail vehicle includes flushing water-carrying installations and wastewater-carrying installations. The flushing water-carrying installations include an intermediate reservoir for storing flushing water and a supply line for supplying the intermediate reservoir with flushing water. The supply line includes a filter for filtering the flushing water supplied to the intermediate reservoir. The supply line is connected to the intermediate reservoir such that flushing water from the intermediate reservoir can be returned through the filter. A backflushing line is connected to the filter and opens into a wastewater-carrying installation. A method for operating the toilet device includes supplying the flushing water through a filter to fill the intermediate reservoir, and flushing a flushable bowl with flushing water from the intermediate reservoir or backflushing the filter with flushing water from the intermediate reservoir and draining off the flushing water to a wastewater-carrying installation.

A removable, reusable, pleated woven wire filter comprising: (a) a stainless steel perforated core having one-half-inch stainless steel round bar reinforcement rings welded to one-half-inch stainless steel round bar cross bars to create bar-ring junctures, and having 11-gauge stainless steel attachment clips welded to each end of the perforated core; (b) a three-layer stainless steel pleated woven wire filter media wrapped around the perforated core, the filter media having spaced apart pleats with external peaks, and an external filter media surface comprising the external peaks of the pleats; (c) a stainless steel flattened expanded metal shroud adjacent to and encircling the external peaks, and (d) a stainless steel top end cap base and a stainless steel bottom end cap base connected to the metal shroud, both cap bases sealed against top and bottom ends of the filter media with a stainless steel adhesive sealant rated at 2,000 degrees Fahrenheit.

A removable, reusable, pleated woven wire filter comprising: (a) a stainless steel perforated core having one-half-inch stainless steel round bar reinforcement rings welded to one-half-inch stainless steel round bar cross bars to create bar-ring junctures, and having 11-gauge stainless steel attachment clips welded to each end of the perforated core; (b) a three-layer stainless steel pleated woven wire filter media wrapped around the perforated core, the filter media having spaced apart pleats with external peaks, and an external filter media surface comprising the external peaks of the pleats; (c) a stainless steel flattened expanded metal shroud adjacent to and encircling the external peaks, and (d) a stainless steel top end cap base and a stainless steel bottom end cap base connected to the metal shroud, both cap bases sealed against top and bottom ends of the filter media with a stainless steel adhesive sealant rated at 2,000 degrees Fahrenheit.

A filter device for cleaning particulate contaminants from a fluid flow, includes a plurality of filter elements (34, 60) accommodated in filter chambers (12, 14, 32) as components of a joint filter housing (10) and grouped around a backwash device (20) having a piston accumulator (56) for receiving a backwash fluid. In the storage housing (64) of the piston accumulator, a piston (57) is guided in a longitudinally movable manner, is controlled by a pressure medium, and passes on the backwash fluid stored in the storage housing (64) on to at least one filter element (60) to be backwashed for cleaning purposes via a backwash device (20). The backwash device also discharges the backwash fluid from the filter device. A specific filter element as a bypass filter element (34) is selected from the plurality of filter elements (34, 60), and exclusively removes particles after a changeover device (18) has been actuated, while the other filter elements (60) are excluded from this removal process.

A suction adapter for filtration systems is disclosed. The suction adapter is useful for filtration systems in which there are screen regions unapproachable by intake openings of nozzles of the suction scanner, such as the case with pleated screens. The suction adapter comprises a partitioning adapted to match within a space-extension of a predetermined size and shape, whereby being useful for tunneling a suction power from an intake opening of the suction scanner to a screen region unapproachable by the intake opening. A method for cleaning a filtration screen having screen regions gapped from a closest approach of an intake opening of a suction scanner is disclosed. The method comprises providing immovable tunneling means between the screen regions and a location of the closest approach, whereby tunneling a suction power of the suction scanner to respective spots on the screen regions when closely approached, respectively, by the intake opening.

Embodiments of the present invention are a filtering element, a filtering equipment and a water circulation cleaning system. In an embodiment, a filtering element includes a filtering screen and filter particles adhered to one side of the filtering screen, sizes of the filter particles being gradually increased in a direction from the one side to the other side of the filtering screen. Meanwhile, there also provides a filtering equipment including the abovementioned filtering element and a water circulation cleaning system including the abovementioned filtering equipment.

Embodiments of the present invention are a filtering element, a filtering equipment and a water circulation cleaning system. In an embodiment, a filtering element includes a filtering screen and filter particles adhered to one side of the filtering screen, sizes of the filter particles being gradually increased in a direction from the one side to the other side of the filtering screen. Meanwhile, there also provides a filtering equipment including the abovementioned filtering element and a water circulation cleaning system including the abovementioned filtering equipment.

A filter assembly may include an outer insert and an inner insert. The outer insert having an aperture and a plurality of outer grooves. The outer grooves are formed in a radially outer periphery of the outer insert and are separated from each other and the aperture. The inner insert may be disposed within the aperture. A plurality of inner grooves may be formed in a radially outer periphery of the inner insert. Each of the outer and inner grooves may have a closed axial end and an open axial end.