CN111140416B

CN111140416B - Filter element group for fuel filtration

Info

Publication number: CN111140416B
Application number: CN201811302433.7A
Authority: CN
Inventors: 乔基奥·基隆迪
Original assignee: Shanghai Sofima Automobile Filter Co ltd
Current assignee: Shanghai Sofima Automobile Filter Co ltd
Priority date: 2018-11-02
Filing date: 2018-11-02
Publication date: 2024-06-21
Anticipated expiration: 2038-11-02
Also published as: CN111140416A

Abstract

A filter cartridge assembly for a filter assembly of a fuel (preferably diesel) filtration system. The cartridge group extends along an axis (X-X) and comprises: a filter membrane through which fuel can pass in an axial direction, the filter membrane having an annular shape and defining a central cavity at an axis (X-X); a water separation and support device that supports a filter membrane and includes: i) A base element supporting the filter membrane and presenting channels and/or holes through which the filtered fuel flows; ii) a tubular element extending into the central cavity and presenting an outlet duct having a substantially annular cross-section delimited by an outer peripheral wall and an inner peripheral wall, the inner peripheral wall delimiting a central passage along an axis (X-X); iii) A separator element through which the filtered fuel can pass for separation from water, wherein the separator element is accommodated on the base element and/or on the inner peripheral wall of the tubular element.

Description

Filter element group for fuel filtration

Technical Field

The present invention relates to a filter cartridge set for a filter assembly of a fuel (preferably diesel) filtration system. The invention further relates to a filter assembly comprising a filter insert set. The invention further relates to a filter system comprising a filter element group.

The environment in which the filter element group, the filter assembly and the filter system of the invention are located is the automotive field: is adapted to be fluidly connectable to a fuel circulation system, wherein fuel flows from a fuel tank to a combustion chamber of an internal combustion engine.

Furthermore, it should be emphasized that in this specification the generic term "filtration" refers to the ability of the filter element assembly to separate dirt from fuel by blocking any suspended solid particles, as well as the ability of the filter element assembly to separate fuel from the water contained therein.

Background

In this respect, in the prior art, solutions for filter cartridge groups and filter assemblies are known in which the fuel is first filtered out of the solid particles and then separated from the water.

In the known solutions for performing the different operations described above, the filter cartridge group has specially designed components: a particulate filter device and a water separator device.

In this case, according to the always existing need in the automotive field, in order to limit the dimensions of the vehicle components without reducing the number of components installed therein, solutions of substantially annular filter cartridge groups have proliferated in which the fuel passes, in a radial direction, firstly through the means for solid filtration and secondly through the means for separating water.

However, it has been found that in the production of such a solution, a compromise must be made: operating in the radial direction but with limited dimensions, it has been decided to sacrifice the radial dimensions of the device for particulate filtration in order to provide a device for separating water. However, this design choice is also reflected in the filtering capacity of the device, in particular in the storage capacity of solid contaminants (i.e. solid particles) before clogging the particle filter.

An example of an embodiment of a filter cartridge group with such a defect is shown in document DE10123190 A1.

Disclosure of Invention

In view of the above, there is a strong need to provide a filter cartridge assembly with improved fuel filtration, while taking into account the need to limit the size to ensure the installation of auxiliary components such as sensors and/or cleaning devices. In other words, there is a strong need for a filter cartridge group with efficient particle filtration and efficient separation of water from fuel, while keeping in mind the technical field that it is necessary to limit the overall size as much as possible.

It is an object of the present invention to provide a filter cartridge assembly, filter assembly and fuel filtration system in which the above-mentioned needs are fully met, and yet which efficiently and effectively responds to the needs of a particular application range.

This is achieved by a filter cartridge set as claimed in claim 1, by a filter assembly as claimed in claim 12 and by a fuel filtration system according to claim 13. The dependent claims show preferred embodiment variants with other advantageous aspects.

Drawings

Other features and advantages of the invention will be better understood from the following description of a preferred embodiment, given by way of non-limiting example, with reference to the accompanying drawings, in which:

FIG. 1 shows a perspective view of a filter assembly of the present invention according to a preferred embodiment;

FIG. 1a shows a perspective view of a separate portion of the filter assembly shown in FIG. 1;

FIG. 2 shows a schematic cross-sectional view of a fuel filtration system including the filter assembly of FIG. 1;

figures 3' and 3 "show two cross-sectional views of a filter cartridge group according to the invention, for example a part of the filter assembly according to figures 1 and 1a adapted to follow two different axial cross-sectional planes;

FIG. 3 '"shows a lower view of the filter cartridge set according to the present invention as shown in FIGS. 3' and 3";

FIG. 3a shows a perspective view of a separate portion of the cartridge assembly of FIG. 3', FIG. 3", FIG. 3'";

FIG. 4 illustrates a side view of a fuel filtration system including a filter assembly in accordance with a preferred embodiment;

FIG. 4a shows a cross-sectional view of the fuel filtration system of FIG. 4;

Fig. 5 shows a cross-sectional view of a filter cartridge group according to the invention, for example suitable as part of a filter assembly according to fig. 4 and 4 a;

FIG. 5a shows a perspective view of a separate portion of the cartridge assembly of FIG. 5;

fig. 6 shows a schematic cross-sectional view of a fuel filtration system including a filter assembly according to another preferred embodiment.

Reference numerals illustrate:

1, a filter element group; 2 a filter membrane; the upper end of 21; 22 lower end; 200 a central cavity; 3 water separation and support means; 31 a tubular element; 310 outlet piping; 311 inner peripheral wall; 3110 circumferential through-holes; 311' inner sealing edge; 312 peripheral walls; 312' outer sealing edge; 300 center channels; a 32 base element; 321 channels; 322 holes; 325 sealing means; 3200 axial through holes; 3' main components; 32' a main base; 3 secondary parts; 32 "secondary base; 500 a filter element assembly; 550 a filter body; 551a cup-shaped element; 551a bottom wall; 551a' clear the hole; 551b side walls; 5510 cup openings; 552 cover member; 5520 a lid opening; 5500 filter chambers; 5500' water collection zone; 900 fuel filtration system; 950 a head member; 951 a rod-like device; X-X axis.

Detailed Description

In the drawings, reference numeral 1 denotes a filter element group according to the present invention. A filter assembly, which correspondingly also includes the filter cartridge group 1, is indicated by reference numeral 500. In addition, reference numeral 900 designates a fuel (preferably diesel) filtration system comprising a filter cartridge group 1 and a filter assembly 500.

As described above, the fuel filtration system 900 is particularly well suited for fluidly connecting to a fuel circulation system. In particular, system 900 includes a filter assembly 500 that is fluidly positioned upstream of an engine combustion chamber such that fuel reaching it is filtered of solid particulates and water, thereby allowing for efficient combustion and operation of the engine and adequate protection of components fluidly positioned downstream of the filter element set.

According to the present invention, fuel filtration system 900 includes a head member 950, head member 950 being particularly adapted for fluid connection with circuit tubing and filter cartridge assembly 1 (and filter assembly 500 adapted for positioning filter cartridge assembly 1). In particular, the headpiece 950 has a special fluid connection to receive dirty fuel and release filtered and clean fuel.

Depending on its application, the headpiece 950 has a variety of embodiments: for example, in some embodiments, the head member 950 includes a component for heating incoming fuel. Or the head member 950 includes a rod-like device 951 extending and located at the axis X-X, such as a purge rod and/or support rod of a water level measuring sensor.

The present invention also relates to a filter assembly 500 suitable as part of a fuel filtration system 900. Such a filter assembly 500 includes a filter cartridge set 1, such as the filter cartridge set described in detail below.

According to some preferred embodiments, the cartridge group 1 is replaceable during maintenance operations.

In addition, the filter assembly 500 includes a filter body 550 defining a filter chamber 5500 therein, wherein filtration occurs in the filter chamber 5500 and the filter cartridge set 1 is positioned in the filter chamber 5500.

According to other preferred embodiments, the entire filter assembly 500, which is replaceable during maintenance operations, is removably secured to the head member 950; in this case, the filter assembly 500 is replaced together with the cartridge group 1.

According to the invention, said filter body 550 extends axially along an axis X-X and comprises a cup-shaped element 551, the cup-shaped element 551 comprising a bottom wall 551a, a side wall 551b and a cup-shaped opening 5510 opposite the bottom wall 551a and peripherally defined by said side wall 551 b.

In accordance with the invention, the filter chamber 5500 has a water collection area 5500' adjacent to the bottom wall 551 a.

According to a preferred embodiment, the bottom wall 551a has a purge hole 551a 'located at the axis X-X, the opening of which allows draining the water collected in the water collection area 5500'.

In addition, the filter body 550 includes a closure cap member 552 that is cup-shaped with an opening 5510.

Preferably, the cap member 552 includes a cap opening 5520 at axis X-X, with filtered fuel flowing through the cap opening 5520. Unfiltered fuel from the fuel tank enters through an opening provided in the cover member (not shown).

According to a preferred embodiment, the cup-shaped member 551 and the cap member 552 are made of metal and crimped together to form a single filter body 550.

According to other embodiments, the cup-shaped member 551 and the cap member 552 may be interconnected by alternating threads. In such an embodiment, for example, the cup-shaped element 551 and the cover element 552 have the form of two half-shells, preferably made of plastic material.

According to the invention, the filter cartridge group 1 extends along an axis X-X and comprises two separate components: a filter membrane 2 and a water separation and support device 3.

According to the invention, the fuel is able to pass through the filter membrane 2 in the axial direction, the filter membrane 2 extending in a height parallel to the axis X-X.

The filter membrane 2 extends axially between an upper end 21 and a lower end 22. Dirty fuel enters the filter membrane 2 from the upper end 21 and flows out from the lower end 22 to filter out solid particles.

According to the invention, the filter membrane 2 does not have an end plate, but has substantially open end walls at both the upper and lower ends.

According to the invention, the filter membrane 2 has an annular shape and defines a central cavity 200 at the axis X-X.

According to the invention, the radial dimension of the filter membrane 2 is substantially equal to the diameter defined by the inner wall of the filter body 550.

In addition, according to the present invention, the filter membrane 2 comprises filter media wound into a roll. Preferably, the filter medium is composed of cellulose and/or glass fibers and/or viscose and/or synthetic fibers such as nylon, polyester or mixtures thereof. According to a preferred embodiment, the filter medium is made of a fibrous material capable of retaining and accumulating solid particles and producing a coalescing effect on water droplets emulsified in the fuel.

According to the invention, the water separation and support device 3 has the dual purpose of supporting the filter membrane 2 and performing a separation action with respect to water of the fuel discharged from the filter membrane 2.

According to the invention, the water separation and support device 3 supports the filter membrane 2 to the filter body 550 and is sealingly engaged by the head member 950.

The water separation and support device 3 actually comprises a base element 32 which engages with the lower end 22 of the filter membrane 2.

The base member 32 has channels 321 and/or apertures 322 through which filtered fuel discharged from the lower end 22 flows 321 and/or apertures 322.

According to a preferred embodiment, the base element 32 has a main extension substantially radial to the axis X-X.

In some embodiments, the base element 32 has a substantially planar shape. In other embodiments, the base member 32 is substantially disc-shaped. In other embodiments, the base member 32 is substantially conical. In other embodiments, the base element 32 has an even more complex shape.

In accordance with the present invention, the channels 321 and apertures 322 are positioned and shaped such that fuel flows out of the lower end 22 in a region radially away from the axis X-X.

According to the invention, the water separation and support device 3 further comprises a tubular member 31, the tubular member 31 extending from the base element 32 along the axis X-X into the central cavity 200.

The tubular member 31 has a substantially annular cross-sectional outlet duct 310. In other words, the tubular element 31 surrounds the outlet duct. In particular, outlet conduit 310 is fluidly connected to head member 950 to allow filtered fuel to flow.

The outlet duct 310 is defined by an outer peripheral wall 312 and an inner peripheral wall 311, said outer peripheral wall 312 being joined to the inner wall of the filter membrane 2, said inner peripheral wall 311 defining the central passage 300 along the axis X-X.

The peripheral wall 312 is adapted to support the inner wall of the filter membrane 2, which defines the central cavity 200. Preferably, the peripheral wall 312 is non-perforated and prevents radial flow of fuel forced through the filter membrane 2.

Further, according to the present invention, the outer and inner peripheral walls 312 and 311 include an outer sealing edge 312 'and an inner sealing edge 311' at the top that sealingly engage the head member 950.

In other words, the outer and inner peripheral walls 312, 311 comprise, in their portions remote from the base element 32, an outer sealing edge 312 'and an inner sealing edge 311', whereby a fluid connection with the head member 950 is obtained to ensure that the filtered fuel flows towards the motor.

According to a preferred embodiment, the outer sealing edge 312 'and the inner sealing edge 311' receive respective gaskets or O-rings for sealing engagement with the head member 950.

According to a preferred embodiment, the outer and inner peripheral walls 312, 311 are made of a plastic material. In this way, the outer sealing edge 312 'and/or the inner sealing edge 311' may have a specific coupling profile that allows for a hermetic seal to be achieved with the head member without the use of additional gaskets.

Preferably, said engagement is obtained by mutual insertion in the axial direction, so that a seal between the components is subsequently obtained in the radial direction.

According to a preferred embodiment, both the outer sealing edge 312 'and the inner sealing edge 311' are positioned at a higher axial position than the upper end 21 of the filter membrane 2.

According to a preferred embodiment, said inner sealing edge 311 'is located at a higher axial position than the outer sealing edge 312'.

According to the embodiment, the inner sealing edge 311' comprises a circumferential lip adapted to engage a sealing surface provided on the head member 950 in a radial direction.

According to a preferred embodiment, the inner sealing edge 311' comprises a circumferential lip adapted to engage in radial direction a rod-like means 951 comprised in the head member 950. In particular, said circumferential lip extends centrally through the channel 300 in a radial direction to engage the rod-like means 951 and perform a sealing action.

Preferably, in the preferred embodiment, the inner sealing edge 311 'is located at a lower axial position than the outer sealing edge 312'.

In addition, according to the invention, the water separation and support device 3 comprises a separator element 35, through which separator element 35 the filtered fuel can pass for water separation. In other words, thanks to the separator element 35, the desired effect of separating the water and any water-based crystals present in the fuel previously filtered by the filter membrane 2 is achieved.

According to the invention, the separator element 35 is located on the inlet side of the outlet duct 310. In this way, fuel filtered by the filter membrane 2 and separated from the water by the separator element 35 flows into the outlet duct 310.

According to the invention, the separator element 35 is housed on the base element 32 and/or on the inner peripheral wall 311 of the tubular member 31.

According to a preferred embodiment of the invention, the tubular member 31 has at least one through hole 3110 on the inner peripheral wall 311 (i.e. a circumferential through hole extending along a circumferential portion and intersecting in a radial direction with respect to the axis X-X) leading to the outlet duct 310, wherein the separator element 35 has the form of a hydrophobic mesh located on said circumferential through hole 3110.

Preferably, there are a plurality of circumferential through holes 3110 in the circumferential direction, and the filtered fuel flows through the circumferential through holes 3110 in the radial direction. Preferably, the circumferential through holes 3110 are angularly equally spaced from each other. Preferably, there are also a plurality of circumferential through holes 3110 in the axial direction.

According to a preferred embodiment, the inner peripheral wall 311 has the form of a tubular frame (defining said circumferential through hole 3110) on which the separator element 35 is positioned.

According to a preferred embodiment, the base element 32 has at least one through hole 3200 leading to the outlet duct 310 (i.e. an axial through hole having a substantially planar extension with respect to a two-dimensional plane orthogonal to the axis X-X and being penetrable in an axial direction parallel to the axis X-X), wherein the separator element 35 has the form of a hydrophobic mesh located on said through hole 3200.

Preferably, a plurality of axial through holes 3200 are positioned with respect to the axis X-X, through which axial through holes 3200 the filtered fuel flows in an axial direction parallel to the axis X-X. Preferably, the axial through holes 3200 are positioned at angularly equidistant intervals from each other. Preferably, there are also a plurality of axial through holes 3200 in the radial direction. In other words, the base element has a plurality of through holes through which the filtered fuel flows in the axial direction.

According to a preferred embodiment, the base element 32 has the form of a substantially planar frame (defining said circumferential through hole 3200), on which the separator element 35 is positioned.

According to a preferred embodiment of the invention, the base element 32 comprises sealing means 325, the sealing means 325 being adapted to sealingly engage the wall of the filter body 550, in particular the side wall 551b. In other words, the base element 32 engages the filter body 550, dividing the filter chamber 5500 into two separate chambers, the upper chamber undergoing solid filtration, the lower chamber undergoing separation of fuel from water (water blocked by the separator element collecting in the water collection area 5500').

According to a preferred embodiment, the sealing device 325 sealingly engages the filter body 550 in a radial direction.

According to the invention, there are several modes of composing the water separation and support device 3 having the above-mentioned characteristics.

According to a preferred embodiment, the water separation and support device 3 is composed of a primary part 3 'and a secondary part 3", the primary part 3' and the secondary part 3" being engageable with each other to define the outlet duct 310.

Preferably, the primary part 3' comprises an outer peripheral wall 312 and the secondary part 3 "comprises an inner peripheral wall 311.

According to a preferred embodiment, the main part 3' also comprises a base element 32.

According to an embodiment, the primary part 3' and the secondary part 3 "are mutually engaged to define the base element 32, wherein the primary part 3' comprises a primary base 32' engaged with the lower end 22 of the filter membrane 2, and the secondary part 3" comprises a secondary base 32".

According to a preferred embodiment, the secondary base 32 "is sealingly connected to the bottom surface of the primary base 32 'and is axially spaced from the bottom surface of the primary base 32' to define a fluid passage in communication with the outlet conduit 310.

According to a preferred embodiment, the primary part 3' and the secondary part 3 "are mutually engaged by mutual axial insertion.

According to a preferred embodiment, the primary part 3' and the secondary part 3 "are mutually engaged by means of a rotationally translational insertion, for example by means of a screw connection or a bayonet connection.

In other preferred embodiments, the primary part 3' and the secondary part 3 "are joined to each other by welding.

According to the above described embodiment, a solution can be provided in which only the secondary part 3 "accommodates the separator element 35. In this way, the design and the associated production are particularly simplified.

The present invention also relates to a solid particulate and water fuel (preferably diesel) filtration system 900 comprising a head piece 950 in fluid communication with a fuel circuit.

According to this embodiment, and as shown in the drawings, the cartridge assembly 1 is sealingly engaged to the head member 950 such that the latter receives filtered fuel separated from water and flows into the outlet conduit 310. Furthermore, the head member 950 comprises a rod-like device 951, such as a cleaning rod and/or a support rod of a water level sensor, the rod-like device 951 being mounted along the axis X-X within the central channel 300 of the cartridge group 1.

Preferably, as described above, the inner sealing edge 311' of the cartridge group engages said head member 950 or said rod-like means 951. Preferably, as described above, the outer sealing edge 312' of the cartridge group engages the head member to define the annular outlet conduit 310.

According to a preferred embodiment, the head member 950 is sealingly engaged to the filter body 550. Preferably, in practice, the head member 950 is sealingly engaged to the filter assembly 500.

In addition, according to a preferred embodiment, in which the filter body 550 comprises a water collection area 5500' (i.e. positioned below the base element 32) in an area adjacent to the bottom wall 551a, said rod-like means 951 extend along the axis X-X to the water collection area. In particular, the rod-like device 951 extends in the length direction to engage with the bottom wall 551a and a clearance hole 551a' provided on the bottom wall 551 a. Preferably, in a preferred embodiment, extraction of the filter assembly 500 from the head member 950 allows extraction of the rod-like device 951 and simultaneous drainage of water collected in the water collection area 5500'. In a preferred embodiment, the rod-like device 951 can be withdrawn while maintaining the filter assembly 500 engaged with the head member 950. Thus, preferably, the rod-like device 951 is withdrawn and simultaneously the water collected in the water collection area 5500' is drained before the filter assembly 500 is subsequently withdrawn from the head member 950.

According to some preferred embodiments, the sealing engagement between the outlet duct 310 and the headpiece 950 is maintained (in particular with a collar or collector provided in particular) even in the configuration of the extraction rod-like device 951; even in the configuration of the extraction rod-like device 951, the dirty and clean sides of the filter assembly do not merge, but remain fluidly separate.

Innovatively, the above-described filter cartridge set, filter assembly, and fuel filtration system fully achieve the objects of the present invention, and overcome the typical shortcomings of the prior art.

In fact, advantageously, the filter cartridge group is suitable for optimizing fuel filtration operations, while having a reduced size.

Advantageously, the filter cartridge group has an optimized particle filtration of the fuel.

Advantageously, the filter membrane has a larger filtration surface than the annular filter media solution (radial intersection).

Advantageously, the filter cartridge group also optimizes separation from water, presenting a wide hydrophobic surface that must be traversed by the fuel before it exits the filter cartridge through the outlet duct.

Advantageously, the cartridge group has a water separation and support device, which has a simple geometry and is easy to manufacture. In particular, the coupling between the support means and the separator element is advantageously performed without additional washers, thereby reducing the cost of the solution.

Advantageously, the filter cartridge group also uses the wall of the outlet duct to separate water from fuel.

Advantageously, the positioning of the axial filter (i.e., filter membrane) upstream of the separator allows for maximum water separation efficiency because the filtered fuel undergoes a change in direction, which improves the pre-separation of heavier components (e.g., water) dispersed in the fuel before reaching the separator.

Advantageously, the relative arrangement of the filter membrane and the hydrophobic separator makes it possible to perform a simple and efficient coupling of the filter cartridge group with the head member without affecting the possibility of installing auxiliary, through rod-like components (e.g. sensors or purging devices) for the operation of the filter device in the inner cavity of the filter.

Advantageously, the filter cartridge assembly may be installed in existing filter assemblies to improve filtration and water separation performance.

Advantageously, a filter membrane of the type of filter material having coalescing properties facilitates (and in some cases uses the action of gravity) the action of separating water from fuel.

It will be apparent to those skilled in the art that modifications may be made to the filter cartridge assembly, filter assembly and fuel filtration system described above to meet the requirements possible, all of which are intended to be included within the scope of protection defined by the appended claims.

Claims

1. A filter cartridge set (1) of a filter assembly (500) of a solid particle and water fuel filtration system (900), wherein the filtration system (900) comprises a head member (950), the filter assembly being engageable to the head member (950), wherein the filter cartridge set (1) is housed in a filter body (550) of the filter assembly (500), and wherein the filter cartridge set (1) extends along an axis (X-X) and comprises:

-a filter membrane (2) through which the fuel can pass in an axial direction, the filter membrane (2) extending in height parallel to the axis (X-X) between an upper end (21) and a lower end (22), wherein the filter membrane (2) has an annular shape and defines a central cavity (200) at the axis (X-X);

-a water separation and support device (3) supporting the filter membrane (2) to the filter body (550) and being engageable by the head member (950), the water separation and support device (3) comprising:

i) -a base element (32) engaged with the lower end (22) of the filter membrane (2), wherein the base element (32) has a main extension substantially radial to the axis (X-X), and wherein the base element (32) has channels (321) and/or holes (322), through which channels (321) and/or holes (322) the filtered fuel flowing out of the lower end (22) flows;

ii) a tubular element (31) extending from the base element (32) along the axis (X-X) into the central cavity (200), wherein the tubular element (31) has an outlet duct (310) having a substantially annular cross section defined by an outer circumferential wall (312) and an inner circumferential wall (311), the outer circumferential wall (312) engaging an inner wall of the filter membrane (2), the inner circumferential wall (311) defining a central channel (300) along the axis (X-X), wherein the outer circumferential wall (312) and the inner circumferential wall (311) comprise an outer sealing edge (312 ') and an inner sealing edge (311') respectively at the top sealingly engaging the head member (950);

iii) -a separator element (35), through which separator element (35) the filtered fuel can pass for water separation, wherein the separator element (35) is accommodated on the base element (32) and/or on an inner circumferential wall (311) of the tubular element (31) such that fuel filtered by the filter membrane (2) and separated from water by the separator element (35) flows in the outlet duct (310).

2. The filter cartridge set (1) according to claim 1, wherein the outer sealing edge (312 ') and the inner sealing edge (311') are both located at a higher axial position than the upper end (21) of the filter membrane (2).

3. The cartridge set (1) according to claim 2, wherein the inner sealing edge (311 ') is located at a lower axial position than the outer sealing edge (312').

4. The cartridge set (1) according to claim 1 or 2, wherein the inner sealing edge (311') comprises a circumferential lip adapted to engage a rod-like means (951) in a radial direction, the rod-like means (951) extending and being located at the shaft (X-X), comprised in the head member (950), such as a purge rod and/or a support rod for a water level sensor.

5. A filter cartridge set (1) according to any one of claims 1 to 3, wherein the tubular element (31) has a plurality of circumferential through holes (3110) on the inner circumferential wall (311) leading to the outlet duct (310), wherein the separator element (35) has the form of a hydrophobic mesh located on the circumferential through holes (3110).

6. A filter cartridge set (1) according to any one of claims 1 to 3, wherein the base element (32) has a plurality of axial through holes (3200) leading to the outlet duct (310), wherein the separator element (35) has the form of a hydrophobic mesh located on the axial through holes (3200).

7. A filter cartridge set (1) according to any one of claims 1 to 3, wherein the base element (32) comprises sealing means (325), the sealing means (325) being adapted to sealingly engage a wall of the filter body (550).

8. A cartridge set (1) according to any one of claims 1 to 3, wherein the water separation and support means (3) consist of a primary part (3 ') and a secondary part (3 ") reciprocally sealingly engageable so as to define the outlet duct (310), wherein the primary part (3') comprises the peripheral wall (312) and the secondary part (3") comprises the inner peripheral wall (311).

9. The cartridge set (1) according to claim 8, wherein the main part (3') further comprises the base element (32).

10. The cartridge set (1) according to claim 8, wherein said primary component (3 ') and said secondary component (3 ") are mutually engaged to define said base element (32) in which said primary component (3 ') comprises a primary base (32 ') engaged with said lower end (22) and said secondary component (3") comprises a secondary base (32 ").

11. The cartridge set (1) according to claim 8, wherein said primary part (3') and said secondary part (3 ") are mutually engaged by mutual axial insertion and/or by insertion in rotation translation.

12. A filter cartridge set (1) according to any one of claims 1 to 3, wherein the fuel is diesel.

13. A filter assembly (500) of a fuel filtration system (900) for filtering solid particulates and water from diesel fuel, the filter assembly (500) comprising:

i) -a filtering body (550) extending axially along a shaft (X-X) and comprising:

a cup-shaped element (551) comprising a bottom wall (551 a), a side wall (551 b) and a cup-shaped opening (5510), the cup-shaped opening (5510) being opposite the bottom wall (551 a) and being defined around a perimeter by the side wall (551 b);

A cap element (552) closing the cup-shaped opening (5510) and comprising a cap opening (5520) at the axis (X-X), the filtered fuel flowing through the cap opening (5520);

ii) a filter cartridge group (1) housed in a filter body (550) according to any one of the preceding claims;

wherein the entire filter assembly (500) is removably secured to a head member (950) included in the fuel filtration system (900).

14. The filter assembly (500) of claim 13, wherein the fuel is diesel.

15. A fuel filtration system (900) for filtering solid particles and water from diesel fuel, the fuel filtration system (900) comprising a head member (950) fluidly connected to a fuel circuit, wherein the cartridge group (1) is sealingly engaged to the head member (950) such that the head member (950) receives filtered fuel separated from water flowing into an outlet conduit (310), wherein the head member (950) further comprises a rod-like device (951), such as a purge rod and/or a support rod of a water level sensor, the rod-like device (951) extending longitudinally along the axis (X-X) within a central channel (300) of the cartridge group (1), the cartridge group (1) being housed in a filter body (550) according to any one of claims 1 to 12.

16. The fuel filtration system (900) of claim 15, wherein the inner sealing edge (311') engages the rod-like device (951).

17. The fuel filtration system (900) of claim 15, wherein the head member (950) is sealingly engaged to the filter body (550).

18. The fuel filtration system (900) of claim 15, wherein the filter body (550) includes a water collection area (5500 ') below the base element (32) in a region adjacent the bottom wall (551 a), and the rod-like device (951) extends along the axis (X-X) to the water collection area, engageable with the bottom wall (551 a) and a purge aperture (551 a') provided on the bottom wall (551 a).

19. The fuel filtration system (900) of claim 15, wherein the fuel is diesel.