GB2408955A

GB2408955A - Fluid filtering means

Info

Publication number: GB2408955A
Application number: GB0419950A
Authority: GB
Inventors: Sze Hsien Chee; Wee Keong Lim
Original assignee: EE CHUAN; ER KIM LIAN
Current assignee: EE CHUAN; ER KIM LIAN
Priority date: 2003-12-08
Filing date: 2004-09-08
Publication date: 2005-06-15
Anticipated expiration: 2024-09-08
Also published as: GB2408955B; MY135588A; GB0419950D0; GB2408955B8

Abstract

The present invention relates to a fluid filtering means (10) and the filtration process using the filtering means (10) as well as the processes of backwashing or cleaning and rinsing the filtering means. The filtering means (10) has a closed-type body (12) made of stainless steel contains a primary fluid distributor (14) having suitably sized cavities, a secondary fluid distributor (16) having suitably sized cavities and multi layers of filter beds, a primary unfiltered fluid inlet (18) connected to water mains, a X-type multiport valve (20) with a control means, a secondary unfiltered fluid inlet (22). The arrangement enables the switching between filtering, rinsing and backwashing using only one valve.

Description

! 2408955

A FLUID FILTERING MEANS

FIELD OF INVENTION

The present invention relates to a fluid filtering means. More particularly, the present invention relates to a water filtering means.

BACKGROUND ART

0 Water usually contains a variety of impurities and is constantly at risk of being contaminated.

Examples of these contaminants are bacteria, microbes, disease producing organisms, organic and inorganic chemicals, colour, odour, tastes, mineral etc. There are many problems associated with incoming municipal treated water. Supply of incoming water, which is turbid, contains suspended particles and sediments. Hence, the yellowish or brownish- coloured water is sometime obtained from our water tap. Sub-optimal water quality with unpleasant taste and odour is unhealthy for consumption and causes staking to our clothes.

Incoming municipal treated water has often been found to contain excessively high level of chlorine (for high residual disinfection of water). Chlorine is effective for providing antibacterial protection as water flows through water pipes and plumbing to the point of use. However, at high level, chlorinated compounds are carcinogenic which may cause cancer. In addition, they tend to slowly corrode most of the galvanised iron pipelines and water tanks.

Incoming water supply may be contaminated by bacteria and pathogens as a result of industrial waste discharge, source water contamination, proliferation of bacteria and pathogens in water storage tanks, maintenance works, water pipe leakages etc. Organic or inorganic chemical and matters may also contaminate the incoming water supply.

To overcome these problems, the technologies applied in the treatment of water are developing and expanding each year. In some cases combinations of the water filtration technologies are used to solve these problems.

0 For specific problems such as the contamination by micro-particles and suspended particles and also water hardness, the use of particle filtration system using various filtration mediums is very common. In the particle filtration system, a filter vessel made of stainless steel, fibreglass or polyethylene materials is required for containing a wide range of filtration mediums.

IS Control valves of various materials such as brass, stainless steel, plastic and polypropylene have long been used in various industries and applications to control the flows of fluids, both liquids and gases. Wide selection different ball valves are available to meet different flow patterns and requirements. The ball configuration in the ball valves dictates the flow pattern.

There are various control ball valves, the common ball valve materials are stainless steel, ABS plastic, plastic, polypropylene, polyethylene and brass. With the advancement in plastic moulding technology, the multiport or multi flow ball valve in a single body has been made available.

In the particle filtration system, ball valves are used to control the water flow for three main processes, i.e. filtration process, backwash (cleaning) process and rinsing process. In view of the differing flow patterns and directions of these three processes, the user may have to control and operate up to a combination of five or six valves in every filter in order to complete the filtration tasks. Some users find it difficult to operate multiple number of valves and/or follow the operating instruction on how the valves are to be operated to achieve the specific derived functions, i.e. water filtration, backwashing or cleaning and rinsing.

Accordingly, there is a need to provide a fluid filtering means which is simple to use and operate.

lo This may be achieved by the adoption and use of only minimal numbers of valves but yet the filtering means is able to perform the required main functions of filtration process, backwashing or cleaning process and rinsing process.

- SUMMARY OF THE INVENTION

Accordingly there is provided a fluid filtering means, the filtering means having (a) a closed-type body made of a food grade material, wherein the body contains a primary fluid distributor having suitably sized cavities, a secondary fluid distributor having suitably sized cavities and multi layers of filtration mediums, each of different size and density, (b) a primary unfiltered fluid inlet, wherein the primary unfiltered fluid inlet is connected to a source of unfiltered fluid and a X-type multiport valve, wherein the X-type multiport valve is provided with a control means, (c) a secondary unfiltered fluid inlet, wherein the secondary unfiltered fluid inlet is connected to the X type multiport valve and the primary fluid distributor through which the unfiltered fluid passes through the multi layers of filtration mediums into a secondary fluid distributor, (d) a primary filtered fluid outlet, wherein the primary filtered fluid outlet is connected to the secondary fluid distributor and the X-type multiport valve and (e) a secondary filtered fluid outlet, wherein the secondary filtered fluid outlet is connected to the X-type multiport valve and a fluid outlet.

There is also provided a filtration process using a fluid filtering means, wherein the filtering means having (a) a closed-type body made of a food grade material, wherein the body contains a primary fluid distributor having suitably sized cavities, a secondary fluid distributor having suitably sized cavities and multi layers of filtration mediums, each of different size and density, (b) a primary unfiltered fluid inlet, wherein the primary unfiltered fluid inlet is connected to a source of unfiltered fluid and a X-type multiport valve, wherein the X-type multiport valve is provided with a control means, (c) a secondary unfiltered fluid inlet, wherein the secondary unfiltered fluid inlet is connected to the X-type multiport valve and the primary fluid distributor through which the unfiltered fluid passes through the multi layers of filtration mediums into a secondary fluid distributor, (d) a primary filtered fluid outlet, wherein the primary filtered fluid outlet is connected to the secondary fluid distributor and the X-type multiport valve and (e) a secondary filtered fluid outlet, wherein the secondary filtered fluid outlet is connected to the X-type multiport valve and a fluid outlet, wherein the control means is operated in such a way to allow the unfiltered fluid from the source to pass through the X-type multiport valve, the secondary unfiltered fluid inlet into the primary fluid distributor before allowing the unfiltered fluid to flow under the influence of gravity and the pressure of the unfiltered water through the multi layers of filtration mediums into the secondary fluid distributor, from which the filtered fluid is then dispensed into the X-type multiport valve via the primary filtered fluid outlet before being dispensed to the water outlet via the secondary filtered fluid outlet.

Also provided a process for backwashing or cleaning a fluid filtering means, wherein the filtering means having (a) a closed-type body made of a food grade material, wherein the body contains a primary fluid distributor having suitably sized cavities, a secondary fluid distributor having suitably sized cavities and multi layers of filtration mediums, each of different size and density, (b) a primary unfiltered fluid inlet, wherein the primary unfiltered fluid inlet is connected to a source of unfiltered fluid and a X-type multiport valve, wherein the X-type multiport valve is provided with a control means, (c) a secondary unfiltered fluid inlet, wherein the secondary unfiltered fluid inlet is connected to the X-type multiport valve and the primary fluid distributor through which the unfiltered fluid passes through the multi layers of filtration mediums into a secondary fluid distributor, (d) a primary filtered fluid outlet, wherein the primary filtered fluid outlet is connected to the secondary fluid distributor and the X-type multiport valve and (e) a secondary filtered fluid outlet, wherein the secondary filtered fluid outlet is connected to the X- type multiport valve and a fluid outlet, wherein the control means is operated in such a way to allow the unfiltered fluid from the source to pass through the X-type multiport valve into the secondary fluid distributor before allowing the unfiltered fluid to flow against the influence of s gravity using the available pressure through the multi layers of filtration mediums into the primary fluid distributor, from which the fluid is then dispensed into the X-type multiport valve before being dispensed out of the filtering means via the secondary filtered fluid outlet.

Further, there is also provided a process for rinsing a fluid filtering means, wherein the filtering lo means having (a) a closed-type body made of a food grade material, wherein the body contains a primary fluid distributor having suitably sized cavities, a secondary fluid distributor having suitably sized cavities and multi layers of filtration mediums, each of different size and density, (b) a primary unfiltered fluid inlet, wherein the primary unfiltered fluid inlet is connected to a source of unfiltered fluid and a X-type multiport valve, wherein the X-type multiport valve is provided with a control means, (c) a secondary unfiltered fluid inlet, wherein the secondary unfiltered fluid inlet is connected to the X-type multiport valve and the primary fluid distributor through which the unfiltered fluid passes through the multi layers of filtration mediums into a secondary fluid distributor, (d) a primary filtered fluid outlet, wherein the primary filtered fluid outlet is connected to the secondary fluid distributor and the X-type multiport valve and (e) a secondary filtered fluid outlet, wherein the secondary filtered fluid outlet is connected to the X- type multiport valve and a fluid outlet, wherein the control means is operated in such a way to allow the unfiltered fluid from the source to pass through the X-type multiport valve, the secondary unfiltered fluid inlet into the primary fluid distributor before allowing the unfiltered - fluid to flow under the influence of gravity the pressure of the unfiltered water through the multi layers of filtration mediums into the secondary fluid distributor, from which the filtered fluid is then dispensed into the X-type multiport valve via the primary filtered fluid outlet before being dispensed out of the filtering means via the secondary filtered fluid outlet.

The present invention consists of certain novel features and a combination of parts hereinafter fully described and illustrated in the accompanying drawings and particularly pointed out in the appended claims; it being understood that various changes in the details may be without departing from the scope of the invention or sacrificing any of the advantages of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

For the purpose of facilitating an understanding of the invention, there is illustrated in the accompanying drawings the preferred embodiments thereof from an inspection of which when s considered in connection with the following description, the invention, its construction and operation and many of its advantages would be readily understood and appreciated.

FIG. I is a water filtering means according to the preferred embodiments of the present invention; 0 FIG. 2 is cross section view of the water filtering means according to FIG. 1 undergoing a filtration process; FIG. 3 is cross section view of the water filtering means according to FIG. 1 undergoing a rinsing process; FIG. 4 is cross section view of the water filtering means according to FIG. 1 undergoing a backwashing or cleaning process.

DETAILED DESCRIPTION OF TIIE PREFERRED EMBODIMENTS

The present invention relates to a fluid filtering means. More particularly, the present invention relates to a water filtering means. Hereinafter, this specification will describe the filtering means according to the preferred embodiments and by referring to the accompanying drawings. However, it is to be understood that limiting the description to the preferred embodiments of the invention and with reference to the accompanying drawings is merely to facilitate discussion of the present invention and it is envisioned that those skilled in the art may devise various modifications and equivalents without departing from the scope of the appended claims.

As mentioned above, FIG. 1 is a water filtering means (10) according to the preferred embodiments of the present invention. The closed-type body (12) is made of stainless steel with internal lining using food grade, epoxy phenolic coating for enhanced corrosion resistance.

The primary unfiltered water inlet (18) is connected to the water mains (not shown in any of the accompanying drawings). The unfiltered water from the water mains passes through the primary unfiltered water inlet (18), the X-type multiport valve (20) and a secondary unfiltered water inlet (22) before entering the filtering means (10).

Reference is now collectively made to FIGS. 2, 3 and 4. The X-type multiport valve (20) is controlled by a valve (not shown in any of the accompanying drawings). Other control valves such as 2-way and 3-way ball valves are normally controlled by multiple combination of valves, normally four or five. Hence, the major difference between the X-type multiport valve (20) and other control valves is that the use of the X- type multiport valve (20) enables lesser number of valves to be controlled by a user in the course of filtering, backwashing or cleaning and rinsing of the filtering means (10).

The filtering means (10) enables the filtering, backwashing or cleaning and rinsing of the filtering means (10) to be conducted by having to control just one valve. This is made possible by providing the filtering means (10) with the X-type multiport valve (20).

FIGS. I and 2 show that the X-type multiport valve (20) is located outside the filtering means to (10). However, it is envisaged that the X- type multiport valve (20) can also be located beside the filtering means (10) as long as the valve is located outside the filtering means (10). The positioning of the valve outside the filtering means (10) is critical as to enable the user to control the flow ofthe unfiltered and filtered water to and from the filtering means (10).

The primary water distributor (14) is located inside the body (12), normally at the top of the multi layers of filtration mediums. The primary water distributor (14) has multiple numbers of suitably sized holes (not shown in any of the accompanying drawings) which enables the primary water distributor (14) to receive the unfiltered water from the water mains via the primary unfiltered water inlet (18), the X-type multiport valve (20) and the multi layers of filtration mediums into the secondary unfiltered water outlet (26). The unfiltered water passes through the multi layers of filtration mediums under the influence of the gravity and the pressure of the water.

- The secondary water distributor (16) is provided at the bottom of the multi layers of filtration mediums. The secondary water distributor (16) also has multiple numbers of suitably sized holes (not shown in any of the accompanying drawings) which enables the secondary water distributor (16) to receive the filtered water from the multi layers of filtration mediums and distribute the s filtered water via a primary filtered water outlet (24). From the primary filtered water outlet (24), the filtered water passes through the X-type multiport valve (20) and a secondary filtered water outlet (26) before being dispensed to the pipes (not shown in any of the accompanying drawings) via the water outlet (28).

The valve is operated in such a way to allow the unfiltered water to pass through the X-type multiport valve (20) into the filtering means (10) and at the same time to allow the filtered water from the filtering means (10) to pass through the X-type multiport valve (20) without having to readjust the valve into a different direction.

The filtering means (10) has multi layers of carefully selected and functional filtration mediums, each of different size and density. The consistency and reliability of these filtration mediums are ensured by ernphasising on the quality, gradation, hardness and purity of the filtration mediums. In the preferred embodiments of the invention, coal based activated carbon, anthracite, fine quartz sand, coarse quartz sand, crystal and coarse special stone are used as the filtration mediums. Other combinations of filtration mediums are also possible depending on the quality of the unfiltered water.

The lightest and finest medium rests at the top and the heaviest and most coarsened medium layer rests at the bottom. The upper layers remove both the larger and smaller particulate matters compared to the lower layers. Particulate matters are trapped and held throughout the entire filter bed particularly by the upper top layers. The combined layering effect helps create a filter bed s with the ability to hold and trap more particulate matters enabling the filter to operate for a longer period of time and filter run before cleaning of the filtering means (10).

As particulate matters accumulate in the filtering means (10) over time, the filtering means (10) should be reconditioned by way of backwashing or cleaning. In cleaning the filtering means (10), lo the turbidity and particulate matters are washed in reversed direction thereby pushing the particulate matters out of the filtering means (10) especially when the upper top lighter and finer medium scour one another.

The larger void space of the coarser and larger medium on the lower layers allow for lateral distribution, getting more water across the bottom face of the filter medium more evenly. This, in turn, enables the filtering means (10) to exert the uniform upward water thrust for full bed expansion and the elimination of entrapped particulate matters and sediments on the upper layers.

This is achieved by operating the valve in a different direction compared to the direction of the valve during the filtration or rinsing process.

As shown in FIG. 4, the unfiltered water from the water mains will pass through the primary unfiltered water inlet (18) into the X-type multiport valve (20) before being dispensed into the secondary water distributor (16). From the secondary water distributor (16), the unfiltered water using about the same pressure when it arrives at the water mains will flow against the gravity through the multi layers of filtration mediums into the primary water distributor (14). From the primary water distributor (14), the water will be dispensed into the X-type multiport valve (20) before being dispensed out of the filtering means via the water outlet (28). s

The rinsing process will now be described by referring specifically to FIG. 3. As shown in this drawing, the valve is operated in the same manner as in the filtration process. Hence the flow of the unfiltered and filtered water will be the same as in the filtration process except that the filtered water will not be dispensed to the pipes but merely dispensed out from the filtering means (10).

Preferably, a pressure gauge (30) can also be provided in the filtering means (10). For instance, the pressure gauge (30) can be connected to the primary unfiltered water inlet (18) or two sets of pressure gauges can be provided, with one before the primary unfiltered water inlet (18) and another after the water outlet (28). It should be envisaged that the filtering means (10) can be used for a wide flow capacity by varying the size of the various inlets and outlets and the capacity of the filtering means (10).

The filtering means (10) can be used to filter any kinds of fluid, i.e. liquids and gases, preferably water. Depending on the characteristics of the fluid such as corrosiveness, temperature, viscosity, turbidity, purity etc., some modifications and changes on the material of constructions may be required. For example, if conditions such require, the valve can be made using stainless steel 316 and 31 6L.

While in the foregoing specification this invention has been described in relation to certain preferred embodiments thereof, and many details have been set forth for purpose of illustration, it will be apparent to those skilled in the art that the invention is susceptible to additional embodiments and that certain of the details described herein can be varied considerably without s departing from the basic principles of the invention.

Claims

1. A fluid filtering means (10), the filtering means (10) having: (a) a closed-type body (12) made of a food grade material, wherein the body (12) contains a primary fluid distributor (14) having suitably sized cavities, a secondary fluid distributor (16) having suitably sized cavities and multi layers of filtration mediums, each of different size and density; (b) a primary unfiltered fluid inlet (18), wherein the primary unfiltered fluid inlet (18) is connected to a source of unfiltered fluid and a Xtype multiport valve (20), wherein the X lo type multiport valve (20) is provided with a control means; (c) a secondary unfiltered fluid inlet (22), wherein the secondary unfiltered fluid inlet (22) is connected to the X-type multiport valve (20) and the primary fluid distributor (14) through which the unfiltered fluid passes through the multi layers of filtration mediums into a secondary fluid distributor (16); (d) a primary filtered fluid outlet (24), wherein the primary filtered fluid outlet (24) is connected to the secondary fluid distributor (16) and the X-type multiport valve (20); and (e) a secondary filtered fluid outlet (26), wherein the secondary filtered fluid outlet (26) is connected to the X-type multiport valve (20) and a fluid outlet (28).

2. The filtering means (10) as claimed in claim 1, wherein the body (12) and the X-type multiport valve (20) are stainless steel.

3. The filtering means (10) as claimed in claim 1, wherein the multi layers of filtration mediums consist of layers of coal based activated carbon, anthracite, fine quartz sand, coarse quartz sand, crystal and coarse special stone, wherein the lightest and finest medium layer rests at the top and the heaviest and most coarsened medium layer rests at the bottom. Other combinations of filtration mediums are possible depending on the unfiltered water quality and problems.

4. The filtering means (10) as claimed in claim 1, wherein a pressure gauge (30) is provided and is connected to the primary unfiltered fluid inlet (18).

0

5. The filtering means (10) as claimed in claim 1, wherein a pressure gauge is provided and is connected to the fluid outlet (28).

6. The filtering means (10) as claimed in claim 1, wherein the control means is a valve.

7. The filtering means (10) as claimed in claim 1, wherein the filtering means (10) is a water filtering means.

8. A filtration process using a fluid filtering means (10), wherein the filtering means (10) having: (a) a closed-type body (12) made of a food grade material, wherein the body (12) contains a primary fluid distributor (14) having suitably sized cavities, a secondary fluid distributor (16) having suitably sized cavities and multi layers of filtration mediums, each of different size and density; (b) a primary unfiltered fluid inlet (18), wherein the primary unfiltered fluid inlet (18) is connected to a source of unfiltered fluid and a X- type multiport valve (20), wherein the X type multiport valve (20) is provided with a control means; (c) a secondary unfiltered fluid inlet (22), wherein the secondary unfiltered fluid inlet (22) is s connected to the X-type multiport valve (20) and the primary fluid distributor (14) through which the unfiltered fluid passes through the multi layers of filtration mediums into a secondary fluid distributor (16); (d) a primary filtered fluid outlet (24), wherein the primary filtered fluid outlet (24) is connected to the secondary fluid distributor (16) and the X-type multiport valve (20); and 0 (e) a secondary filtered fluid outlet (26), wherein the secondary filtered fluid outlet (26) is connected to the X-type multiport valve (20) and a fluid outlet (2X) wherein the control means is operated in such a way to allow the unfiltered fluid from the source to pass through the X- type multiport valve (20), the secondary unfiltered fluid inlet (22) into the primary fluid distributor (14) before allowing the unfiltered fluid to flow under the IS influence of gravity and the pressure of the unfiltered water through the multi layers of filtration mediums into the secondary fluid distributor (16), from which the filtered fluid is then dispensed into the X-type multiport valve (20) via the primary filtered fluid outlet (24) before being dispensed to the water outlet (28) via the secondary filtered fluid outlet (26).

9. The filtration process as claimed in claim 8, wherein the body (12) and the X-type multiport valve (20) are stainless steel.

10. The filtration process as claimed in claim 8, wherein the multi layers of filtration mediums consist of layers of coal based activated carbon, anthracite, fine quartz sand, coarse quartz sand, crystal and coarse special stone, wherein the lightest and finest medium layer rests at the top and the heaviest and most coarsened medium layer rests at the bottom. Other combinations of filtration mediums are possible depending on the unfiltered water quality and problems.

11. The filtration process as claimed in claim 8, wherein a pressure gauge (30) is provided and is connected to the primary unfiltered fluid inlet (18).

12. The filtration process as claimed in claim 8, wherein a pressure gauge is provided and is connected to the fluid outlet (28).

13. The filtration process as claimed in claim 8, wherein the control means is a valve.

14. The filtration process as claimed in claim 8, wherein the filtering means (10) is a water filtering means.

15. A process for backwashing or cleaning a fluid filtering means (10), wherein the filtering means (10) having: (a) a closed-type body (12) made of a food grade material, wherein the body (12) contains a primary fluid distributor (14) having suitably sized cavities, a secondary fluid distributor (16) having suitably sized cavities and multi layers of filtration mediums, each of different size and density; - (b) a primary unfiltered fluid inlet (18), wherein the primary unfiltered fluid inlet (18) is connected to a source of unfiltered fluid and a X-type multiport valve(20), wherein the X type multiport valve (20) is provided with a control means; (c) a secondary unfiltered fluid inlet (22), wherein the secondary unfiltered fluid inlet (22) is connected to the X-type multiport valve (20) and the primary fluid distributor (14) through which the unfiltered fluid passes through the multi layers of filtration mediums into a secondary fluid distributor (16); (d) a primary filtered fluid outlet (24), wherein the primary filtered fluid outlet (24) is connected to the secondary fluid distributor (16) and the X-type multiport valve (20); and lo (e) a secondary filtered fluid outlet (26), wherein the secondary filtered fluid outlet (26) is connected to the X-type multiport valve (20) and a fluid outlet (28) wherein the control means is operated in such a way to allow the unfiltered fluid from the source to pass through the X-type multiport valve (20) into the secondary fluid distributor (16) before allowing the unfiltered fluid to flow against the influence of gravity using the available pressure through the multi layers of filtration mediums into the primary fluid distributor (14), from which the fluid is then dispensed into the X-type multiport valve(20) before being dispensed out of the filtering means (10) via the secondary filtered fluid outlet (26).

16. The process as claimed in claim 15, wherein the body (12) and the Xtype multiport valve (20) are stainless steel.

17. The process as claimed in claim 15, wherein the multi layers of filtration mediums consist of layers of coal based activated carbon, anthracite, fine quartz sand, coarse quartz sand, crystal and coarse special stone, wherein the lightest and finest medium layer rests at the top and the heaviest and most coarsened medium layer rests at the bottom. Other combinations of filtration mediums are possible depending on the unfiltered water quality and problems.

18.The process as claimed in claim IS, wherein a pressure gauge (30) is provided and is connected to the primary unfiltered fluid inlet (18).

19. The process as claimed in claim 15, wherein a pressure gauge is provided and is connected to the fluid outlet (28).

20. The process as claimed in claim I S. wherein the control means is a valve.

21. The process as claimed in claim IS, wherein the filtering means (10) is a water filtering means.

22. A process for rinsing a fluid filtering means (10), wherein the filtering means (10) having: (a) a closed-type body (12) made of a food grade material, wherein the body (12) contains a primary fluid distributor (14) having suitably sized cavities, a secondary fluid distributor (16) having suitably sized cavities and multi layers of filtration mediums, each of different size and density; (b) a primary unfiltered fluid inlet (18), wherein the primary unfiltered fluid inlet (18) is connected to a source of unfiltered fluid and a X- type multiport valve (20), wherein the X type multiport valve (20) is provided with a control means; (c) a secondary unfiltered fluid inlet (22), wherein the secondary unfiltered fluid inlet (22) is connected to the X-type multiport valve (20) and the primary fluid distributor (14) through which the unfiltered fluid passes through the multi layers of filtration mediums into a secondary fluid distributor (16); s (d) a primary filtered fluid outlet (24), wherein the primary filtered fluid outlet (24) is connected to the secondary fluid distributor (16) and the X-type multiport valve (20); and (e) a secondary filtered fluid outlet (26), wherein the secondary filtered fluid outlet (26) is connected to the X-type multiport valve (20) and a fluid outlet (28) wherein the control means is operated in such a way to allow the unfiltered fluid from the lo source to pass through the X-type multiport valve (20), the secondary unfiltered fluid inlet (22) into the primary fluid distributor (14) before allowing the unfiltered fluid to flow under the influence of gravity and the pressure of the unfiltered water through the multi layers of filtration mediums into the secondary fluid distributor (16), from which the filtered fluid is then dispensed into the X-type multiport valve (20) via the primary filtered fluid outlet (24) IS before being dispensed out of the filtering means (10) via the secondary filtered fluid outlet (26).

23. The process as claimed in claim 22, wherein the body (12) and the Xtype multiport valve (20) are stainless steel.

24. The process as claimed in claim 22, wherein the multi layers of filtration mediums consist of layers of coal based activated carbon, anthracite, fine quartz sand, coarse quartz sand, crystal and coarse special stone, wherein the lightest and finest medium layer rests at the top and the heaviest and most coarsened medium layer rests at the bottom. Other combinations of filtration mediums are possible depending on the unfiltered water quality and problems.

25. The process as claimed in claim 22, wherein a pressure gauge (30) is provided and is connected to the primary unfiltered fluid inlet (18).

26. The process as claimed in claim 22, wherein a pressure gauge is provided and is connected to the fluid outlet (28).

0

27. The process as claimed in claim 22, wherein the control means is a valve.

28. The process as claimed in claim 22, wherein the filtering means (10) is a water filtering means.