Abstract: A filter device is disclosed comprising a filter which is used to clean a fluid flow of particulate contamination in a specifiable flow direction, having a fluid inlet for supplying an unfiltered medium flow, a fluid outlet for removing a filtrate flow, and a discharge opening for discharging a backflushing fluid produced while backflushing the filter against the specifiable flow direction using a backflushing device, wherein as the particulate contamination being cleaned out of the fluid flow by the filter increases, the differential pressure between the fluid inlet and the fluid outlet increases, characterised in that a valve device is arranged downstream of the discharge opening, viewed in the fluid flow direction, said valve device regulating the discharge rate of backflushing fluid as a function of the differential pressure.

Abstract: Filter apparatus, consisting of at least—a filter (14), which is divided into individual filter segments,—a cleaning device (19), which has, associated with each filter segment, a partial cleaning unit (20, 21, 22), which can be moved along the cleaning device and which cooperates with a removal device (23), and—a control device (40), which activates at least one partial cleaning unit for cleaning, whereas at least one further partial cleaning unit remains inactive during this cleaning, wherein the control device (40) has a coupling device, which in one position of the coupling device, connects the cleaning device (19) to the discharge device (23) for a common rotary movement and, in another position of the coupling device, separates them from one another.

Abstract: The invention relates to a filter apparatus, in particular in the form of a hollow cylinder (10) having a filter material (12), characterized in that a pre-filter (16) is mounted upstream of a surface filter (14) in the flow direction of a fluid stream to be cleaned from particulate contaminants, which pre-filter comprising a bulk material (18) for increasing the effective surface of the filter material (12), which bulk material is received between delimiting layers (20, 22) which are in each case provided with holes for fluids, the opening width of which is smaller than the diameter of a single grain (24) of the bulk material (18).

Abstract: A switching apparatus for a fluid flow with a first fluid-conducting connection (5) and a second fluid-conducting connection (6) between first and second treatment devices (3, 4) has a first pair of switching levers (11, 12) assigned to first and second distributor valves (7, 8) and a second pair of switching levers (15, 16) assigned to third and fourth distributor valves (13, 14) arranged in different planes. The switching levers (11, 12) of the first pair can be actuated by an operator without obstruction with the switching levers (15, 16) of the second pair, and vice versa.

Abstract: A vessel, particularly a pressure vessel, has a tubular housing part (10) in which a cover part (12) can be secured. Support segments (18) are inserted at least in some areas in a recess (14) on the interior (16) of the housing part (10). These segments provide support to the cover part (12) when it is installed. At least one fixing device (22) ensures a releasable engagement between cover part (12) and at least one of the support segments (18).

Abstract: A filter device for fluids, in particular for low viscosity fluids such as water, comprising a filter housing (1) in which element holders (31) are provided for a plurality of filter elements (21), whose filter medium (35) in the filter housing (1) separates an unfiltered side (5) from a clean side (7), wherein the filter housing (1) can be opened for the purpose of inserting and removing the filter elements (21), is characterized in that a carrier in the form of a basket (19) is provided for the filter elements (21), said basket can be inserted into and removed from the filter housing (1), and the filter elements (21) can be releasably secured at said basket.

Abstract: A system for purifying as includes at least one housing (2) having a first chamber (6) into which the gas to be purified can flow, and a second chamber (10) forming a filter chamber, out of which the purified gas exits and with a filter device through which the gas can flow. The filter device has filter media (54) for separating out solid particles and for dehumidifying the gas for precipitating coalesced fluid. The first chamber (6) has a cyclone (60) for pre-dehumidifying the gas, from which dirt particles and fluids can be discharged into a third chamber (14) of the housing (2). The housing (2) is composed of an upper housing part (8) with the second chamber (10) forming the filter chamber, a middle housing part (4) with a first chamber (6) having the cyclone (60), and a lower housing part (12) forming the third chamber (14), that can be clamped together by at least one tensioning bolt (32), forming a closed pressure vessel.

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 for the insertion of filter elements (28) to be positioned in a filter housing (10) having a filter inlet (20) and a filter outlet (22) for the fluid to be filtered. The filter elements (28) are traversed in both directions for filtration or backwashing. Certain filter elements (28) perform the filtration in a filtration position and at least one additional filter element (28) can be backwashed in a backwashing position to clean its active filtration surface. As the individual filter elements (28) are brought into the backwashing position and are then returned to their filtration position in succession by a pivoting device (30), the filter elements are individually displaced into the backwashing position in a temporal sequence, in contrast to prior art, where an arm-type backwashing device is pivoted towards the individual filter elements to carry out the backwashing process.

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: A fluid system for a pump circuit (10), in particular a hydraulic high-pressure pump circuit, has a function block (12). In the housing of the function block, fluid-conducting paths extend and are connected to valve components (32, 46) at least partially. A filter device is an at least partially integrated constituent part of the function block of the fluid system. The filter device (46) with its filter housing (56) can be connected to the function block (12) such that at least one filter element (70) is received in the installation space (72) of the function block.

Abstract: A filter apparatus deposits impurities from a fluid stream by use of a filter element (10) accommodated in a filter casing (12). The filter casing (12) has a swirl space (14) such that the fluid stream to be filtered is conducted at least partly in a swirling flow around the filter element (10). The properties of a cyclone are utilized for the actual filtration operation to the extent that the swirl space of the filter casing brings about multiple deflection of the direction of motion of the fluid to be filtered.

Abstract: A system for gas cleaning has at least one casing (1) with a first chamber (31) into which the gas to be cleaned can be flowed and with a second chamber (33) from which the cleaned gas exits. A filter device (35) can have the gas flow through it and can be arranged between the chambers. The filter device has filter media both for the separation of solid particles and for dehumidifying the gas by separating out coalesced liquid. The system has, upstream of the filter device (35), an arrangement (11, 37) for preliminary dehumidification of the gas.

Abstract: A filter installation and method, especially a seawater filter installation and method, includes at least one fluid line (18,20) for transporting a biological fluid, a filter device (54) mounted in the fluid line with at least one filter element (22) in a filter housing (10), and a device for biological decontamination. The device for biological decontamination contains active substances that can be introduced into the filter housing (10), such as inert gases or special metals, ensuring that toxic impurities cannot enter. The active substances used are ecofriendly unlike chemically produced fungicides and herbicides.

Abstract: A filter device includes a filter housing (10), a filter inlet (12), a filter outlet (14), and a filter element (16). The filter element divides a filter area (18) into two partial areas (20, 22). One partial filter areas is conical in form with the cross-section of that partial area (20) being tapered from the filter inlet (12) to the filter outlet (14). The partial areas are separated from each other by the filter element. This arrangement results in an optimum residence time distribution inside the filter device at a uniform flow rate, which is particularly useful for highly viscous fluids such as polymer melts or similar.

Abstract: A filter device, in particular, for high-pressure applications in a molten polymer filtration, has a screw-in piece (10), provided with a first threaded section (12) for fixing the filter device, and a second threaded section (14) for fixing a filter medium (16), in particular, in the form of a metal wool and with a perforated support tube (18) for the metal wool. The other free end of the filter device is provided with a volume displacer (24). The metal wool is surrounded by a support grid (20) and fixed by two fixing pieces (28, 30), held at a separation from each other by the support grid (20). One fixing piece (28) is fixed to the second threaded section (14) of the screw-in piece (10). The other fixing piece forms a handle (30) for the fixing formed.

Abstract: The invention relates to a separating device, particularly for separating solids from liquids, preferably from the quantity of reverse flow of a reverse flow filter system. The separating device comprises: a spinning screen provided in the form of a drum screen (17) having an annular screen wall (21); a spray tube (15), which supplies the liquid to the drum screen (17) and which, with regard to its opening (26) to the inside of the screen wall (21) of the drum screen (17), extends in an at least approximately tangential manner thereto in order to produce a spinning flow of the liquid on the screen wall (21); a housing (19) that surrounds the drum screen (17) while serving to hold the liquid passing through said screen wall (21), and; an exit (29) located at the bottom (27) of the drum screen (17) while serving to discharge the separated substances.

Abstract: A process for production of conical filter elements, in particular slotted tube filter elements, includes forming a support structure of a plurality of support rods around which is wound at least one wire profile in individual turns. Slots are left clear in the wire profile through which a fluid may pass. The wire profile is, at least in part, rigidly connected to the support rods and is enclosed in a screen grid. The screen grid, at least in part, rests against the wire profile, follows to the same extent the conical path of the filter element, and is provided on its ends with end components. Since the conical screen grid is in the form of a one-piece pull-on part fitted on the support structure and since the pull-on part is designed to be longer than the support structure, after the screen grid has been pulled onto the support structure, at least one projecting length of the screen grid may be separated for precision fitting and is connected to the respective end component of the filter element.

Abstract: A filtering device for a spinning head for producing plastic threads. The spinning head has a housing in which the plastic melt flows through a filter element under pressure before exiting the spinnerets. The filter element is provided with a filtering material that is subjected to an axial contact pressure through a distributor device, according to the degree of pressure of the melt. This contact pressure acts upon the sealing edges of the filter element to close the sealing gaps. The special geometrical configuration of the filter element and/or its elasticity guarantee advantageous filtering in terms of energy. The filtering system is resistant to pressure and provides good, permanent sealing.

Abstract: A method for producing a sealing connection between a filter mat of a tubular filter element and a metallic head piece encircling the filter element at one end. The head piece has an annular groove accommodating the edge of the filter mat. In order to reduce the internal diameter of the annular groove, the wall adjacent to the periphery is compressed by the periphery of the head piece towards the interior by applying a force of pressure which is directed radially towards the interior. The wall of the annular groove adjacent to the periphery is provided with an enlargement which enlarges the diameter of the head piece. The force of pressure for compressing the wall is applied in the area of said enlargement.