Abstract: A process separates out and removes water present in liquid fuels. The fuel supplies an internal combustion engine by a fuel delivery pump (12). Water is separated out at a filter (5) having a collecting space (27) for collecting separated water and connected upstream of the suction side (11) of the fuel delivery pump (12). The pump suction action counteracts outflow of water from the collecting space (27). Depending on the amount of water collected, the pump suction action is negated, and an outlet valve at an outflow orifice (37) of the collecting space (27) is opened by a discharge (43, 53) producing a pressure gradient enabling the discharge of water from the collecting space (27) over a discharge period when the fuel delivery pump (12) is operating.

Abstract: A apparatus separates out and removes water present in liquid fuels. The fuel supplies an internal combustion engine by a fuel delivery pump (12). Water is separated out at a filter (5) having a collecting space (27) for collecting separated water and connected upstream of the suction side (11) of the fuel delivery pump (12). The pump suction action counteracts outflow of water from the collecting space (27). Depending on the amount of water collected, the pump suction action is negated, and an outlet valve at an outflow orifice (37) of the collecting space (27) is opened by a discharge (43, 53) producing a pressure gradient enabling the discharge of water from the collecting space (27) over a discharge period when the fuel delivery pump (12) is operating.

Abstract: A filter device has a filter housing (1), at least one filter element (13) received in the filter housing (1) and an inner fluid space (71) limited by a filter medium (17) through which the fluid to be cleaned can flow. The filter medium separates the inner fluid space (71) from an exterior fluid space (11) located in the filter housing (1). The filter housing (1) has a fluid inlet (7) and a fluid outlet for cleaned fluid. A fluid guide device (9) is connected downstream to the fluid inlet (7) and can be optionally retrofitted to form a flow path between the fluid inlet (7) and the exterior fluid space (11) or between the fluid inlet (7) and the inner fluid space (71) disposed in the filter element (13).

Abstract: A filter device, especially a line filter forming part of hydraulic installations, includes a filter housing (1) that can be removed from a filter head and is used to receive a filter element (5) that separates a non-filtered side (13) from a filtered side (11) in a position in the filter housing for the operation of the filter. The filter device is provided with a display device (19, 21) signaling the absence or presence of the filter element (5) in the filter housing (1) in the operating position.

Abstract: A filter device having a filter housing (1) and at least one filter element (13) that can be received in the filter housing (1) and that has an inner fluid space (71), which is limited by a filter medium (17), through which the fluid to be cleaned can flow, and which separates the inner fluid space (71) from an exterior fluid space (11) located in the filter housing (1), wherein the filter housing (1) has a fluid inlet (7) and a fluid outlet for cleaned fluid, characterized in that a fluid guide device (9) is connected downstream to the fluid inlet (7), which can be retrofitted such that it optionally forms a flow path between the fluid inlet (7) and the exterior fluid space (11), or between the fluid inlet (7) and the inner fluid space (71) disposed in the filter element (13).

Abstract: A process for separating out and removing water present in liquid fuels, especially water from diesel oil, wherein the fuel is conveyed in a line system (3, 9, 13) which serves to supply an internal combustion engine by means of a fuel delivery pump (12), water is separated out at a filter arrangement (5) which has a collecting space (27) for collecting water which has been separated out and which is connected upstream of the suction side (11) of the fuel delivery pump (12), such that its sucking action counteracts an outflow of water from the collecting space (27), and wherein, depending on the collection of a given amount of water, the sucking action of the delivery pump (12) is negated and an outlet valve disposed at an outflow orifice (37) of the collecting space (27) for removing water is opened, is characterized in that the sucking action which counteracts the outflow of water is negated by a discharge means (43; 53), by means of which a pressure gradient which enables the discharge of water can be gene

Abstract: The invention relates to a filter device with a housing (10) composed of at least two housing parts (12, 14) which are to be connected detachably to one another, said housing holding a filter element (26) which comprises a support tube (28) and a filter material (32) surrounding the support tube (28), wherein the ends (34, 36; 38, 40) of the support tube (28) and filter material (32) run into at least one holding part (42, 46; 44, 48). Since, according to the characterizing part of claim 1, the filter material (32) can be withdrawn in a direction (50) to separate it from the support tube (28) and since, in this direction (50) of withdrawal, the support tube (28) and the filter material (32) alike are provided with a predeterminable taper, it is possible for the contaminated filter material (32) to be readily withdrawn from the support tube (28) such that the support tube (28), together with its holding parts, can be reused in conjunction with a newly inserted filter material (32).

Abstract: The invention relates to a filter device, especially a line filter forming part of hydraulic installations, said filter device comprising a filter housing (1) that can be removed from a filter head and is used to receive a filter element (5) that separates a non-filtered side (13) from a filtered side (11) in a position in the filter housing for the operation of the filter. According to the invention, the filter device is provided with a display device (19, 21) signalling the absence or presence of the filter element (5) in the filter housing (1) in the operating position.

Abstract: A tubular filter element for filtering fluids includes a zigzag folded filter mat having rounded off mat ends. The mat ends face one another and are located in fixed positions. A bed of adhesive connects and bonds the mat ends. A cylindrical expandable metal grid surrounds at least one side of the filter mat and forms an expandable metal jacket. The metal jacket has a small mesh width and protectively surrounds the filter mat. The metal jacket has bent jacket ends defining the bed of adhesive and extends radially inwardly. The jacket ends face one another to define a space receiving the mat ends. The mat ends and the jacket ends extend substantially parallel.