Fuel filter

Fuel filter (1) with a device separating water from fuel, the device comprising

• a filter housing (2),
• a filter element (3) arranged in the filter housing (2), the filter element (3) for the filtration of particles from the fuel,
• at least one filter screen element (6) arranged in the filter housing (2) with the at least one filter screen element (6) arranged downstream of the filter element (3), and
• with a tank (15) located under the filter screen element (6) at the filter housing (2) in which droplets of the separated water are collected,
• characterized in that a pump (18) that can be switched on as needed, and a non-return valve (19) located downstream the pump in the flow direction are positioned in the tank (15), the non-return valve (19) having a specified opening pressure, the non-return valve (19) comprising a valve shutoff element (22) activated by the delivery pressure of the pump (18).

Fuel filter (1) with a device separating water from fuel, the device comprising

• a filter housing (2),
• a filter element (3) arranged in the filter housing (2), the filter element (3) for the filtration of particles from the fuel,
• at least one filter screen element (6) arranged in the filter housing (2) with the at least one filter screen element (6) arranged downstream of the filter element (3), and
• with a tank (15) located under the filter screen element (6) at the filter housing (2) in which droplets of the separated water are collected, and
• with a deviation device for deviating the fuel between the filter element (3) and the filter screen element (6),
• characterized in that the tank (15) is provided with an outlet (21) connected to a catchment chamber (24) which contains a substance that stores liquid,
• said catchment chamber (24) including at least sectionally a permeable wall (26).

A fuel filter (1) with a separation device separating water from fuel, the separating device comprising:

• a filter housing (2);
• a filter element (3) for the filtration of particles from the fuel;
• at least one sleeve-shaped filter screen element (6) positioned in said filter housing (2), said screen element located downstream said filter element (3), said filter screen element including a polyamide hydrophobic material having a mesh opening of between 5 μm and 500 μm;
• at least one guide plate for guiding descending water droplets positioned in a lower area of the filter housing (2);
• a tank (15) positioned under said filter screen element (6) at said filter housing (2) in which droplets of the separated water are collected, said tank including an outlet (21) connected to a catchment chamber (24) which contains liquid absorbent solids (25), said catchment chamber (24) including at least sectionally a permeable fleece wall (26);
• a collecting chamber (27) having an outlet opening (28) configured to be selectively openable as needed, said collecting chamber separated from said catchment chamber (24) by said permeable fleece wall (26);
• a pump (18) positioned in said tank
• a level sensor (36) for detecting the water level in the tank (15) and actuating said pump;
• a non-return valve (19) positioned in said tank and in fluid communication with an outlet of said pump, said non-return valve having a predefined opening pressure, said valve including
• a valve shutoff element (22) activated by delivery pressure of the pump (18), said non-return valve further having a diaphragm clamped at its edge, a central section of which is closed by a channel;
• and
• a flow direction deviation device for deviating fuel flow from a downwards flow to an upwards flow, said deviation device positioned between said filter element (3) and said filter screen element (6), said deviation device including
• a tubular housing insert (7) housing insert having at least one opening (10) at a lower end of said tubular housing insert (7), said opening (10) located in a lower position in the filter housing than said filter element (3), said housing insert and said screen element forming an annular chamber (8) therebetween, said annular chamber closed at its upper end;
• wherein said liquid absorbent solids (25) is a hydrocarbon-absorbing medium including any of activated carbon, aluminum oxide.