Abstract: A filter for filtering liquids has a housing with an inlet for liquid to be filtered and an outlet for filtered liquid. A coaxial filter element with a filter medium having an interior is arranged in the housing such that the filter element separates the inlet from the outlet. A central tube is fastened to the housing and the filter element is arranged coaxially on the central tube. An inner support body is arranged in the interior of the filter medium in a radial direction of the filter element between a radial inner circumferential side of the filter medium and the central tube. The inner support body has support webs distributed in an axial direction and in a circumferential direction of the inner support body. The support webs support the filter medium at least radially on the central tube.

Abstract: A filter element for liquid filtration has a hollow-cylindrical filter medium body and an end disk covering an end face of the filter medium body. A central cutout axially penetrates the end disk. An outflow channel for liquid to be filtered or filtered liquid is arranged at the end disk and connects to a liquid collecting space. The outflow channel extends from a radially outward wall surface of the filter medium body to the central cutout of the end disk. The outflow channel is controlled by a drainage device. A filter device with a filter housing provided with such a filter element has a drainage device that controls the outflow channel. A filter device with a drainage device having a first drainage position for draining only water and a second drainage position draining water from a water collecting space and liquid from a liquid collecting space is provided.

Abstract: A filter system (200) includes a housing (210) in which a replaceable filter element (100) is arranged between a pre-filtration side (202) and a post-filtration side (204). The filter element (100) has an element-fixed central tube (150), wherein a closure element (10) is provided on a housing side, the closure element (10) opening a post-filtration-side fluid outlet (250) when the filter element (100) has been inserted, and blocking the post-filtration-side fluid outlet (250) when the filter element (100) has been removed. The filter element (100) has an actuating element (160) for the closure element (10).

Abstract: A filter element (10) for a liquid medium such as fuel, having a filter medium (16) which is arranged in an annular manner and a venting arrangement (30), having a first vent channel (60), connected at the intake end to the pre-filtration side (26) of the filter element (10), a vent tube (32) which extends away from the upper end plate (12) and which has at one end an inlet opening (34) and at the other end an outlet opening (36) for fluidic connection of the vent tube (32) to a vent stub of a filter housing, or a vent tube portion for connection to a vent tube of a filter housing, which portion extends away from the upper end plate (12) axially in the direction of the lower end plate (14) and has an inlet opening (34) at one end.

Abstract: The invention relates to a filter element (10) having a first fluid path (12) on a raw side (60) for filtering a first fluid (64) and a second fluid path (14) having a fluid line (16) on a clean side (62) for carrying a second fluid (66). The filter element (10) is provided at least on one side with a first end plate (20). Here, the fluid line (16) is arranged in the central inner region (36) of the filter element (10) and connected with the end plate (20) for joint disassembly, especially securely connected to the filter element. The invention further relates to a filter system (100) including such a filter element (10).

Abstract: A water separator for water contained in fuel has a water separator housing with a separator element. A water collecting chamber is arranged in operation of the water separator below the separator element. A water collecting chamber through opening fluidically connects the water collecting chamber with the separator element. A drainage through opening has a first end which leads, for draining water from the water separator, out of the water separator. A second end is connected fluidically by an overflow valve to the water collecting chamber. The overflow valve has a float closing off a connection between drainage through opening and water collecting chamber when a water filling level has not reached the overflow valve. The float has an average density of 700 kg/m3 to 1,000 kg/m3 so that the float, when the water filling level is reached, opens the connection between water collecting chamber and drainage through opening.

Abstract: A filter element (10) for a liquid medium, in particular fuel, having a first vent channel (60) connected at the intake end to the pre-filtration side (26) of the filter element (10), a second vent channel (66) connected at the intake end to the post-filtration side (28) of the filter element (10); and a vent tube (32) having has at one end an inlet opening (34) and at the other end an outlet opening for fluidic connection of the vent tube (32) to a vent stub of a filter housing, or a vent tube portion for connection to a vent tube of a filter housing.

Abstract: A filter device comprises a hollow cylindrical filter element in a filter housing. The fluid that is to be purified is to radially flow through the filter element. The interior of the filter element forms an axial flow chamber for the fluid. An end plate is arranged on the front side of the filter element. An annular neck, onto which a sealing element is injection-molded, is connected to the end plate.

Abstract: The invention relates to a filter element (10) having a first fluid path (12) on a raw side (60) for filtering a first fluid (64) and a second fluid path (14) having a fluid line (16) on a clean side (62) for carrying a second fluid (66). The filter element (10) is provided at least on one side with a first end plate (20). Here, the fluid line (16) is arranged in the central inner region (36) of the filter element (10) and connected with the end plate (20) for joint disassembly, especially securely connected to the filter element. The invention further relates to a filter system (100) including such a filter element (10).

Abstract: A valve device for a fuel filter module has a first fluid channel through which fuel flows only in recirculation mode of the fuel filter module and a second fluid channel through which fuel flows only outside of the recirculation mode. The first fluid channel extends inside the second fluid channel. The first and second fluid channels are coaxial to each other. A fuel filter module switchable into recirculation mode and out of recirculation mode is provided with a control valve that has a valve bore and a valve device arranged in the valve bore, wherein the valve device has a first fluid channel through which fuel flows only in recirculation mode and a second fluid channel through which fuel flows only outside of the recirculation mode. The first fluid channel extends inside the second fluid channel, and the first and second fluid channels are coaxial to each other.

Abstract: A filter for filtering liquids has a housing with an inlet for liquid to be filtered and an outlet for filtered liquid. A coaxial filter element with a filter medium having an interior is arranged in the housing such that the filter element separates the inlet from the outlet. A central tube is fastened to the housing and the filter element is arranged coaxially on the central tube. An inner support body is arranged in the interior of the filter medium in a radial direction of the filter element between a radial inner circumferential side of the filter medium and the central tube. The inner support body has support webs distributed in an axial direction and in a circumferential direction of the inner support body. The support webs support the filter medium at least radially on the central tube.

Abstract: Disclosed is a filter element (86) with multi-stage cleaning, and a fuel filter (84) having such a filter element (86). The filter element (86) has a particle filter medium, a coalescer medium, a sediment gap (98) and a final separator screen. The filter housing has a filter housing body (110) and a cover (106) screwed onto the filter housing body (110). When the cover (106) is unscrewed from the filter housing body (110), at least one bayonet projection (112) of the filter element (86) engages behind a corresponding bayonet receptacle (114), such that the cover (106) can be removed together with the filter element (86) arranged thereon by way of the bayonet connection.

Abstract: An oil centrifuge has an integral, rotatably mounted centrifuge rotor and a feed tube connected to the centrifuge rotor. A flow path is provided that supplies oil to the centrifuge rotor. The feed tube is a section of the flow path. The flow path has a throttle point having a reduced throttle cross section that is reduced relative to an upstream flow path cross section of the flow path upstream of the throttle point.

Abstract: The invention relates to a filter element (10) having a first fluid path (12) for filtering a first fluid and a second fluid path (14) having a fluid line (16) for carrying a second fluid, wherein a non-return valve (18) is arranged in the second fluid path (14), said non-return valve (18) closing the second fluid path (14) if a flow of the first liquid through the filter element (10) is interrupted. The invention further relates to a filter system (100) including such a filter element (10).

Abstract: The invention relates to a filter element (10) having a first fluid path (12) on a raw side (60) for filtering a first fluid (64) and a second fluid path (14) having a fluid line (16) on a clean side (62) for carrying a second fluid (66). The filter element (10) is provided at least on one side with a first end plate (20). Here, the fluid line (16) is arranged in the central inner region (36) of the filter element (10) and connected with the end plate (20) for joint disassembly, especially securely connected to the filter element. The invention further relates to a filter system (100) including such a filter element (10).

Abstract: A sealing device (24) of a filter system (10) for filtering fluids, in particular of a motor vehicle, with a sealing ring (26) is described. The sealing ring (26) serves to seal a pipe (16), in particular a central pipe of a filter housing (12), that penetrates through a flange-sided opening (18) of an end plate (20), in particular of an end element of a filter element (14). The sealing ring (26) features a central section (58) that connects it with the end plate (20). The sealing ring (26) features in its axial direction on both sides of the central section (58) elastic sealing sections (60, 62) which cause each a reduction of the inner diameter of the sealing ring (26) compared with the central section (58).

Abstract: An oil centrifuge has an integral, rotatably mounted centrifuge rotor and a feed tube connected to the centrifuge rotor. A flow path is provided that supplies oil to the centrifuge rotor. The feed tube is a section of the flow path. The flow path has a throttle point having a reduced throttle cross section that is reduced relative to an upstream flow path cross section of the flow path upstream of the throttle point.

Abstract: An oil centrifuge has an integral, rotatably mounted centrifuge rotor and a feed tube connected to the centrifuge rotor. A flow path is provided that supplies oil to the centrifuge rotor. The feed tube is a section of the flow path. The flow path has a throttle point having a reduced throttle cross section that is reduced relative to an upstream flow path cross section of the flow path upstream of the throttle point.

Abstract: A water separator for water contained in fuel has a water separator housing with a separator element. A water collecting chamber is arranged in operation of the water separator below the separator element. A water collecting chamber through opening fluidically connects the water collecting chamber with the separator element. A drainage through opening has a first end which leads, for draining water from the water separator, out of the water separator. A second end is connected fluidically by an overflow valve to the water collecting chamber. The overflow valve has a float closing off a connection between drainage through opening and water collecting chamber when a water filling level has not reached the overflow valve. The float has an average density of 700 kg/m3 to 1,000 kg/m3 so that the float, when the water filling level is reached, opens the connection between water collecting chamber and drainage through opening.

Abstract: A filter element (10) for a liquid medium such as fuel, having a filter medium (16) which is arranged in an annular manner and a venting arrangement (30), having a first vent channel (60), connected at the intake end to the pre-filtration side (26) of the filter element (10), a vent tube (32) which extends away from the upper end plate (12) and which has at one end an inlet opening (34) and at the other end an outlet opening (36) for fluidic connection of the vent tube (32) to a vent stub of a filter housing, or a vent tube portion for connection to a vent tube of a filter housing, which portion extends away from the upper end plate (12) axially in the direction of the lower end plate (14) and has an inlet opening (34) at one end.