Abstract: A filter device has a filter housing (1) with a fluid inlet (13) for raw fluid, with a fluid outlet (3) for filtrate and with at least one one-piece or multi-piece filter insert (5, 7) received in the filter housing (1). The filter insert can be cleaned using at least one back-flushing member (21) in counter-current to the filtration direction. This back-flushing member can, by a fluid-guiding driveshaft (23) of a rotary drive (35), be moved along the inner side (19) of the respective filter insert (5, 7) and has, at its end adjacent to this inner side (19), a gap-shaped passage opening (39) that extends parallel to the axis of rotation of the driveshaft (23) and that discharges into a flow space (41; 57; 67) fluidically connected to the driveshaft (23). The flow space at least partially continuously narrows in the direction of the driveshaft (23) in a first plane in which the passage opening (39) lies.

Abstract: A filter device has a filter housing (1) having a fluid inlet (8) for unfiltered matter and having a fluid outlet (9) for filtrate, and has at least one one-piece or multi-part filter insert (15, 17) held in the filter housing (1). Filter insert (15, 17) can be cleaned using a backwash device (25) having at least one backwash element (31) in counter flow to the direction of filtration. The backwash element can be moved along the inside of the relevant filter insert (15, 17) by a fluid-conveying drive shaft (29) of a rotary drive (69, 71). The individual backwash element (31) has, at the end adjacent to this inside, at least one gap-shaped passage opening, which extends in parallel to the axis of rotation of the drive shaft (29) and which opens into a flow chamber connected to the drive shaft (29) in a fluid-conveying manner. At least one further backwash device (27) has a further backwash element (31). The fluid-conveying drive shaft (29) is divided into chambers (73, 75) separated from each other.

Abstract: A filtering apparatus has filtering elements (11) in a filter housing (1), a filter inlet (7) and a filter outlet (9). During filtration, one of the filter elements (11) can be back-flushed by a back-flushing device (45, 49), having a pressure control device (19). The pressure control device has a hydraulic accumulator (19), with a fluid chamber (47) fillable during filtration with clean fluid and connectable for back-flushing via a back-flushing guide (45) to the clean side (29) of the filtering element (11) to be cleaned. For back-flushing, a further fluid chamber (48) of the hydraulic accumulator (19) is subjected to gas pressure. By resultant movement of a separator (59) of the hydraulic accumulator (19), the filling amount of the clean fluid is dispensed for the back-flushing.

Abstract: A filter device, comprising a filter housing (1) having a fluid inlet (8) for unfiltered matter and having a fluid outlet (9) for filtrate and having at least one one-piece or multi-part filter insert (05, 17) held in the filter housing (1), which filter insert (15, 17) can be cleaned using a backwash device (25) having at least one backwash element (31) in counter flow to the direction of filtration, which backwash element can be moved along the inside of the relevant filter insert (15, 17) by means of a fluid-conveying drive shaft (29) of a rotary drive (69, 71), wherein the individual backwash element (31) has, at the end adjacent to this inside, at least one gap-shaped passage opening, which extends in parallel to the axis of rotation of the drive shaft (29) and which opens into a flow chamber connected to the drive shaft (29) in a fluid-conveying manner, is characterized in that at least one further backwash device (27) having at least one further backwash element (31) is present, in that the fluid-conve

Abstract: A filter device having a filter housing (1) with a fluid inlet (13) for raw fluid and with a fluid outlet (3) for filtrate and with at least one one-piece or multi-piece filter insert (5, 7) which is received in the filter housing (1) and can be cleaned using at least one backflushing member (21) in counter-current to the filtration direction, which member can, by means of a fluid-guiding driveshaft (23) of a rotary drive (35), be moved along the inner side (19) of the respective filter insert (5, 7) and has, at its end adjacent to this inner side (19), a gap-shaped passage opening (39) that runs parallel to the axis of rotation of the driveshaft (23) and discharges into a flow space (41; 57; 67) fluidically connected to the driveshaft (23), which space at least partially continuously nar¬rows in the direction of the driveshaft (23) in a first plane in which the passage opening (39) lies, is characterized in that, in another second plane transverse to the first plane, the flow space (41; 57; 67) at least part

Abstract: A filter device includes at least one filter housing (1) in which at least one filter element (21) is arranged. Inside the filter housing (1), the filter element separates a clean side (9) from an untreated side (13). On the clean side (9) of the filter housing (1) at least one storage unit (3) having at least one movable separating element (47) is connected. The separating element divides the storage unit (3) into two working chambers or pressure chambers (49) (43).

Abstract: A filtering apparatus has a plurality of filtering elements (9) in a filter housing (1), a filter inlet (45) and a filter outlet (43). During the filtration operation, one of the filtering elements (9) can be back-flushed by a back-flushing device (13, 21). The back-flushing device has a pressure control device (13) including a hydraulic accumulator (13). One accumulator fluid chamber (67) can be filled during the filtration operation with a quantity of filtered fluid and can be connected for a back-flushing operation via a back-flushing guide (21) to the clean side (59) of the filtering clement (9) to be cleaned. Another accumulator fluid chamber (79) can be subjected to a media pressure.

Abstract: A filtering apparatus with a plurality of filtering elements (9) which can be accommodated in a filter housing (1) having a filter inlet (45) for fluid to be filtered and a filter outlet (43) for the filtered fluid, wherein during the filtration operation, at least one of the filtering elements (9) can be back-flushed by means of a back-flushing device (13, 21) in order to dedust the effective filtering surface of said filtering element, the back-flushing device comprising a pressure control device (13) for assisting the back-flushing operation, is characterized in that the pressure control device comprises a hydraulic accumulator (13), the one fluid chamber (67) of which can be filled during the filtration operation with a quantity of dedusted fluid and can be connected for a back-flushing operation via a back-flushing guide (21) to the clean side (59) of the filtering element (9) to be dedusted, and in that, for a back-flushing operation, a further fluid chamber (79) of the hydraulic accumulator (13) can be

Abstract: A filtering apparatus with a plurality of filtering elements (11) which can be accommodated in a filter housing (1) having a filter inlet (7) for fluid to be filtered and a filter outlet (9) for the filtered fluid, wherein during the filtration operation, at least one of the filtering elements (11) can be back-flushed by means of a back-flushing device (45, 49) in order to dedust the effective filtering surface of said filtering element, the back-flushing device comprising a pressure control device (19) for assisting the back-flushing operation, is characterized in that the pressure control device comprises a hydraulic accumulator (19), the one fluid chamber (47) of which can be filled during the filtration operation with a quantity of dedusted fluid and can be connected for a back-flushing operation via a back-flushing guide (45) to the clean side (29) of the filtering element (11) to be dedusted, and in that, for a back-flushing operation, a further fluid chamber (48) of the hydraulic accumulator (19) can b

Abstract: The invention relates to a filter device comprising at least one filter housing (1) in which at least one filter element (21) is arranged. Inside the filter housing (1), the filter element separates a clean side (9) from an untreated side (13). The device is characterised in that, on the clean side (9) of the respective filter housing (1) at least one storage unit (3) having at least one movable separating element (47) is connected, which divides the storage unit (3) into two working chambers (49) or pressure chambers (43).

Abstract: A filter device operating method involves a plurality of filter elements (21) received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid. Flow through the filter elements (21) is possible in both directions for filtration or backwashing. Because the shut-off element (41) is a fast-closing plate valve (43) actuated by a hydraulic piston (53) and blocks the fluid connection so quickly, a feeding effect is created in the manner of a pressure blow on the backwashed filter element (21). The feeding effect increases the cleaning of pollution on the filter element (21), achieving an improved backwashing cleaning.

Abstract: A filter device operating method involves a plurality of filter elements (21) received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid. Flow through the filter elements (21) is possible in both directions for filtration or backwashing. Because the shut-off element (41) is a fast-closing plate valve (43) actuated by a hydraulic piston (53) and blocks the fluid connection so quickly, a feeding effect is created in the manner of a pressure blow on the backwashed filter element (21). The feeding effect increases the cleaning of pollution on the filter element (21), achieving an improved backwashing cleaning.

Abstract: A filter device includes a plurality of filter elements (21) received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid. Flow through the filter elements (21) is possible in both directions for filtration or backwashing. Because the shut-off element (41) is a fast-closing plate valve (43) actuated by a hydraulic piston (53) and blocks the fluid connection so quickly, a feeding effect is created in the manner of a pressure blow on the backwashed filter element (21). The feeding effect increases the cleaning of pollution on the filter element (21), achieving an improved backwashing cleaning.

Abstract: The invention relates to a filter device, comprising a plurality of filter elements (21), which can be received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid, wherein flow through the filter elements (21) is possible in both directions for filtration or backwashing. Because the shut-off element (41) is a fast-closing plate valve (43), which can be actuated by means of a hydraulic piston (53) and blocks the fluid connection mentioned above so quickly that a feeding effect is created in the manner of a pressure blow on the backwashed filter element (21), said feeding effect increasing the cleaning of pollution on the filter element (21), an improved backwashing cleaning is achieved.