GB2491361A

GB2491361A - Magnetic filter apparatus

Info

Publication number: GB2491361A
Application number: GB1109089.1A
Authority: GB
Inventors: Neil Johnson
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-31
Filing date: 2011-05-31
Publication date: 2012-12-05
Anticipated expiration: 2031-05-31
Also published as: GB201109089D0; GB2491361B

Abstract

A magnetic filter apparatus comprises a housing 801, 802 comprising an inlet 805 for introducing a fluid and an outlet 806 for removal of a said fluid. A magnet 803 is locatable within said housing and is configured to attract and filter magnetic particulates from a said fluid flowing through said housing. The magnetic filter apparatus further comprises a secondary filter 810 configured to separate non-magnetic particulates from a suspension of a said fluid flowing through said housing. Preferably the housing further comprises a drain (1005, Fig 10) valve and a secondary dosing inlet for introducing a water treatment fluid into the housing. Advantageously the magnetic filter apparatus is used in central heating systems.

Description

MAGNETIC FILTER APPARATUS

Field of the Invention

[0001] The present invention relates to a magnetic filter apparatus.

Background of the Invention

[0002] The present invention relates to a magnetic filter apparatus. More specifically, the present invention relates to a magnetic filter apparatus for a central heating system.

[0003] Central heating systems are generally configured to provide warmth to the interior of an industrial or domestic building. A central heating system is usually powered or fuelled at a single point for example, from combustion of heat in a boiler, in order to provide heat to single or multiple rooms in a domestic or commercial building via for example radiation of heat from radiators or pipes.

Central heating systems can be combined with other systems to provide climate control to a building.

[0004] The most common method of heat generation in a central heating system involves the combustion of fuels in specialized chambers, furnaces or boilers. The heat generated in the chamber, furnace or boiler, is then distributed, usually through fluid via a number of fluid channels. The fluid may be forced air, steam or water which is fed through a pipe work system. In more modern central heating systems, a solar powered heat system is utilized. A typical central heating system using circulatory circulation to distribute fluid and particularly water around the system incorporates the following components; a fuel supply line, for example gas or oil; a boiler or heat exchanger in order to heat water in an enclosed water system; a pump or plurality of pumps in order to distribute and circulate water around the central heating system/radiators, which incorporate distribution chambers through which heated water passes through and via which heat may be radiated into a room of a commercial or domestic building to be heated, therefore providing warmth and comfort.

[0005] Water circulatory central heating systems are now generally closed systems whereby the water circulates around the central heating system independently from the buildings normal water supply. There is an inherent problem in water circulatory/wet central heating systems. Through constant use of central heating systems, the boiler, radiators and other system components oftencorrode and rust away internally. This is a process known as "electrolytic corrosion". In addition to electrolytic corrosion, a buildup of lime scale as well as other impurities can form in the central heating system which will mix with the water being circulated around the system. Lime scale is a hard deposit which forms on the inner surface of pipes and other surfaces where hard water containing calcium carbonate precipitates out of hot water. Electrolytic corrosion results in a rusting of the internal surfaces of the central heating system components by oxidation. One of the main products of electrolytic corrosion through the oxidation of the iron on the internal surfaces of the central heating system components is the ferromagnetic mineral called magnetite. The magnetite will eventually form a black sludge. A byproduct of magnetite is hydrogen gas and this hydrogen gas is often the cause of the need for regular bleeding of central heating system components for example radiators and is often mistaken for air.

[0006] The particles of magnetite (iron oxide) or rust, are black due to the lack of oxygen in the central heating system, and often turn to a typical orange or red color when drained due to further oxidation from the air.

[0007] These water impurities can range in size from macroscopic pieces, to microscopic and dissolved water borne particles, causing the visible effect of a dirty black water.

[0008] Through continued circulation of the black dirty water or sludge around the central heating system, the impurities in the water slowly begin to block up the pipes, radiators, rubber diaphragms, flow switches, valves and other central heating system components. Furthermore, pump bearings begin to wear away, becoming noisy in operation.

[0009] Ultimately, if the process of corrosion and buildup of lime scale/impurities is not prevented or reversed, then the central heating system will eventually fail, resulting in a lower heat output, poor fuel economy and the reduced energy and efficiency thus causing an increase in fuel and maintenance bills to the owner of the central heating system.

[00101 Ultimately, if a central heating system becomes sufficiently blocked, then the central heating system will cease to work and the whole or part of the central heating system will need to be replaced.

[0011] Other particulate impurities which may be present in a central heating system to cause the problems as identified above may include small pieces of wood, rubber, polystyrene, polytetrafluoroethylene (PTFE), jointing paste and silicon sealing compounds which may be used during installation or maintenance of the central heating system.

[0012] Combination boilers are particularly susceptible to the problems identified above, as they often incorporate small bore sensing pipes and intricate orifices in diverter block components, valves, pump impellors/bearings, heat exchangers, pressure/heat sensors, gauze filters and other components. Micro bore pipe work systems of 8mm and 10mm diameter are more susceptible to failure in a poorly maintained system as they are more likely to encounter blockage. The increased fuel usage resultant from impurity buildup will also result in an increase of carbon dioxide emission leading to a less environmentally friendly system.

[0013] The two main ways of combating the buildup of impurities in a central heating system and thus the buildup of contaminated water is either the method of inhibiting the buildup of impurities or removal of impurities which have been built up.

[0014] The first method of inhibition is achieved by the addition of a water treatment to a central heating system before the buildup of water impurities has accumulated. Such water treatment commonly comes in the form of a chemical in order to prevent rusting, corrosion and/or the buildup of lime scale. As most central heating systems are now of a sealed, pressurized type, and have no tanks to easily pour water treatment chemicals into, the addition of water treatment chemicals can be an arduous and awkward task.

[0015] Five commonly used water treatment additives / chemicals are: * Rust Inhibitors -counteracts the effects of corrosion and prevents the formation of limescale.

* Sludge Removers -breaks down magnetite sludge deposits and allows fluid to flow more freely through the system.

* Cleansers -breaks down jointing compounds and neutralises the corrosive flux which remains present in pipe-work and radiators after installing a new system.

* Scale Breakers -will dissolve Jimescale deposits inside boiier components and heat exchangers, restoring heat transfer and resulting in greater central heating system efficiency.

* Leak Sealers -stops leaks in inaccessible areas, such as pipework laid in concrete floors, screwed steel jointing, underfloor heating, heat pumps and solar systems.

[0016] One such method of incorporating a water treatment chemical into a central heating system is disclosed at www.therustbusterto.uklndex.rThp?page=vesseL The rust buster dosing vessel comprises an inlet pipe and an outlet pipe to which the vessel incorporating the water treatment chemical is connected. The opposite ends of the inlet and outlet pipes are connected to the central heating system terminals such that the central heating system water is diverted through the dosing vessel such that the water treatment chemical is carried through water coming into the dosing vessel via the inlet and pumped out of the outlet and into the central heating system.

[0017] A disadvantage of water treatment inhibition devices, also known as dosing devices, is that such treatment devices do not incorporate a method for removal of existing metallic or non metallic water impurities which have already built up in a central heating system.

[0018] The second method of prevention involves the removal of water impurities from a central heating system via filtration.

[0019] GB 2402894 B discloses a separator device. The separator device of GB 2402894 B is suitable for a heating system for use in the separation of ferrous particles from a flow of fluid. The separator device comprises a housing having an inlet and an outlet, a magnetic element being located within the housing to collect an separate from a flow of fluid through the housing ferrous particles carried by the fluid, wherein the housing is provided with an air bleed device. The air bleed device comprises an inlet device in the form of an externally threaded bolt defining passage, a seating surrounding part of the passage, a valve member being spring loaded towards the seating close to the passage, and a screw threaded component engageable with a seating close to the passage, movement of the component from its seating allowing air to escape from the housing.

[0020] GB 2402894 B discloses that the air bleed device is advantageous in that if the housing is opened to allow the removal of ferrous particles collected thereby, a quantity of air may be introduced into the system in which the device is located. The provision of the air bleed device allows such air to be easily and safely removed from the system. Inlet and outlets are configured to generate a swirling motion in the fluid passing through the housing. The separating device comprises a magnetic element formed of a tubular member within which one or more magnets are hermetically sealed. A removable sleeve may also be provided over at least part of the magnetic element for ease of cleaning.

[0021] The separator device of GB 2402894 B is disadvantageous. The device is only configured to remove magnetic impurities from the fluid of a central heating system. In this regard, non magnetic impurities such as lime scale, wood and polystyrenes will remain in the central heating system such that the fluid remains contaminated and thus blockage and/or failing of the central heating system may still be resulted. The seperator device does not have the feature of a drain valve, therefore the addition of liquid water treatment chemicals is difficult.

[0022] GB 2448232 A discloses a particle separator. GB 2448232 A more specifically discloses a method apparatus for separating magnetic and non magnetic particles from water in a domestic central heating system. The particle separator comprises a housing having an inlet and an outlet and upper and lower end. A magnet is located in the housing and the inlet and the outlet are arranged so that in use, water flows through the apparatus in a cyclonic motion from the inlet downwardly proximate to the walls of the housing inner sleeve and then upwardly within the inner sleeve, passing within the vicinity of the magnet and thento the outlet. Particles entrained within the water separate out by vortex separation as the water flows downwardly. Furthermore, magnetic particles entrained within the water are collected on the magnet as the water flows upwardly. The particle separator further comprises a sleeve located within the housing such that an outer circulation channel is defined between the sleeve and the magnet. The inlet of the housing is arranged to deliver the flow of water into the outer circulation channel, and the outlet of the housing is arranged to exhaust water from the inner circulation channel. GB 2448232 A discloses a particle separator whereby non magnetic impurities are removed by the process of vortex separation.

[0023] This method of removal of water impurities is disadvantageous as the rate and efficiency of water impurities separated out from water is dependent on flow rate of water flowing through the separation device is further not as reliable for particulates or impurities of a smaller size. The particle separator of GB 2448232 A does not comprise a physical filtration barrier in order to actively separate particulates and impurities from fluid of a central heating system.

Furthermore neither GB 2448232 or GB 2402894 B disclose a device which actively blocks and removes water borne non-magnetic particulates entrained in the slurry entering the device. Furthermore, neither GB 2448232 or GB 2402894 B disclose a feature to collect magnetic impurities from the device for easy removal and cleaning.

[0024] An object of the invention is to provide a magnetic filter apparatus for a central heating system configurable to remove both magnetic and non magnetic particulate impurities from fluid flowing through a central heating system.

Summary of the Invention

[0025] According to a first aspect there of the present invention, there is provided a magnetic filter apparatus comprising: a housing comprising an inlet for introducing a fluid and an outlet for removal of a said fluid; and a magnet locatable within said housing configured to attract and filter magnetic particulates from a said fluid flowing through said housing; wherein said magnetic filter apparatus further comprises a secondary filter configured to separate non-magnetic particulates from a suspension of a said fluid flowing through said housing.

[0026] Preferably said housing is comprised of a housing main body connectable to a housing back section.

[0027] Preferably said inlet and said outlet are located on said housing back section.

[00281 May be said housing further comprises a secondary dosing inlet for introducing a water treatment fluid into said housing.

[0029] May be said housing further comprises a drain valve.

[0030] Preferably said magnet is removable from said housing.

[0031] Preferably said magnet can be encased within a magnet housing.

[0032] May be said magnet housing is locatable within a plastic sleeve.

[0033] Preferably said housing back section is connectable to said housing main body via at least one bolt fitting.

[0034] May be said secondary inlet and said drain valve each comprise a removable cap.

[0035] May be said housing comprises a pressure indicating means.

[0036] Preferably said secondary filter comprises a mesh structure.

[0037] May be said secondary filter comprises a gauze structure.

[00381 May be said secondary filter apparatus comprises non blocking portion.

[0039] May be said secondary filter apparatus comprises a variable segment section.

[0040] Preferably said housing has an internal volume of less than 600 millilitres (ml).

[0041] Preferably said at least one magnet comprises at least one iron boron neodymium magnet.

[0042] May be said at least one magnet comprises at least one cobalt magnet.

[0043] May be said at least one magnet comprises at least one ferrite magnet.

[0044] May be said at least one magnet comprises at least one alnico magnet.

[0045] May be said at least one magnet comprises at least one alcomax magnet [0046] Preferably said housing comprises a rubber seal configured to connect said back plate and said main body in an air and/or water tight manner.

[0047] Other aspects are as set out in the claims and detailed description herein.

Brief Description of the Drawincis

[0048] For a better understanding of the invention and to show how the same may be carried into effect, there will now be described by way of example only, specific embodiments, methods and processes according to the present invention with reference to the accompanying drawings in which: Figure 1 illustrates a front perspective view of a housing back section of a magnetic filter apparatus according to a preferred embodiment.

Figure 2 illustrates a back perspective view of a housing back section of a magnetic filter apparatus according to a preferred embodiment.

Figure 3a illustrates a front perspective view of a secondary filter of the magnetic filter apparatus according to an embodiment.

Figure 3b illustrates a back perspective view of a secondary filter of the magnetic filter apparatus according to an embodiment.

Figure 3c illustrates a side on view of the secondary filter of the magnetic filter apparatus according to an embodiment.

Figure 3d illustrates a top birds-eye view of the secondary filter according to an embodiment of the magnetic filter apparatus.

Figure 3e illustrates a bottom birds-eye view of the secondary filter according to an embodiment of the magnetic filter apparatus.

Figure 4a illustrates a perspective view of the housing main body of the magnetic filter apparatus according to a preferred embodiment.

Figure 4b illustrates a side on view of the housing main body of the magnetic filter apparatus according to a preferred embodiment.

Figure 4c illustrates a top view of the housing main body of the magnetic filter apparatus according to a preferred embodiment.

Figure 4d illustrates a birds-eye view of the interior of the housing main body of the magnetic filter apparatus according to a preferred embodiment.

Figure 5a illustrates a perspective view of a screw cap of the magnetic filter apparatus according to a preferred embodiment.

Figure 5b illustrates a birds-eye view of the interior of the screw cap of the magnetic filter apparatus according to an embodiment.

Figure 5c illustrates a birds-eye view of the exterior of the screw cap of the magnetic filter apparatus according to an embodiment.

Figure 5d illustrates a side on view of the screw cap of the magnetic filter apparatus according to an embodiment.

Figure 6a illustrates in perspective view a magnet sleeve of the magnetic filter apparatus according to a preferred embodiment.

Figure 6b illustrates a birds-eye view of magnet sleeve of the magnetic filter apparatus according to a preferred embodiment.

Figure 6c illustrates a side view of the magnet sleeve of the magnetic filter apparatus according to a preferred embodiment.

Figure 7 illustrates a side view of a pressure indicator arrangement of the magnetic filter apparatus according to a preferred embodiment.

Figure 8 illustrates an exploded view of the magnetic filter apparatus according to a preferred embodiment.

Figure 9 illustrates a side perspective view of the magnetic filter apparatus according to a preferred embodiment.

Figure 10 illustrates a side on view of an embodiment of the magnetic filter apparatus.

Figure 11 illustrates a side view of an alternative embodiment of a pressure indicator arrangement of the magnetic filter apparatus.

Detailed Description of the Embodiments

[0049] There will now be described by way of example a specific mode contemplated by the inventors. In the following description numerous specific details are set forth in order to provide a thorough understanding. It will be apparent however, to one skilled in the art, that the present invention may be practiced without limitation to these specific details. In other instances, well known methods and structures have not been described in detail so as not to

unnecessarily obscure the description.

[0050] Referring to Figure 1 herein, housing back section 100 comprises inlet 110, outlet 120, inlet connection point 130, outlet connection point 140, internal shape 150, inlet channel pipe exit point 160, inlet fluid directional flow 170, outlet fluid entry point 180, outlet fluid directional flow 190, housing back section surface 200, seal 210, spigot joint 220 and bolt holes 260.

[0051] Referring to Figure 2 herein, housing back section 100 comprises inlet channel pipe fluid directional flow 230, inlet channel pipe 240.

[0052] Referring to Figures 3a, 3b, 3c, 3d and 3e herein secondary filter 300 comprises central funnel section 301, fluid inlet 302, unfiltered fluid directional flow 303, hollow conical protrusion 304, detachable/removable segment means 305, mesh segment 306, removable segment 307, channel/pore 308, secondary filter main body 309, locating means 310, pincer 311, fluid directional flow from housing main body through secondary filter 312.

[0053] Referring to Figures 4a, 4b, 4c and 4d herein, housing main body 400 comprises a trunk 401, magnetic element head 402, dosing inlet 403, housing 405, screw cap 406, secondary outlet/drain 407, bottom end of housing main body 408, dosing inlet screw thread 409, top end of housing main body 410, main body connecting member 411, bolt holes 412, main body connecting member plate 413.

[0054] Referring to Figures 5a, 5b, 5c and Sd herein, screw cap 500 comprises gripping means 501, screw cap outer surface 502 and magnet attachment point 504.

[0055] Referring to Figures 6a, 6b and 6c herein, magnet housing sleeve 600 comprises tab 601, well/drip tray 602, housing sleeve stem 603, ribbed channels 604.

[0056] Referring to Figure 7 herein, pressure indicator arrangement 700 comprises dosing cap 703, translucent/transparent casing 701, button means 702, seal7O4.

[0057] Referring to Figures 8 and 9 herein, magnetic filter apparatus 800 comprises housing back section 801, housing main body 802, magnet 803, magnet screw cap 804, inlet 805, outlet 806, dosing inlet 807, secondary outlet magnet insertion point 820 808, magnet housing sleeve 809, secondary filter 810, seal 811, bolts 812, bolt holes 813, housing back section flat surface 814, housing main body 815 and dosing cap 816.

[0058] Referring to Figure 10 herein, magnetic filter apparatus 1000 comprises housing main body 1001, housing back section 1002, dosing cap or pressure indicator cap 1003, magnet housing 1004, drain valve 1005, magnet 1006, inlet channel pipe 1007, secondary filter 1008, housing main body internal chamber 1009, magnetic field 1010, outlet 1011, outgoing fluid directional flow 1012, incoming fluid directional flow 1013, inlet valve 1014 and spigot jointi 01 5, magnet housing sleeve 1016, outlet valve 1017, secondary filter pincers 1018 and drain valve cap 1019.

[0059] Referring to Figure 11 herein, pressure indicator arrangement 1100 comprises translucent/transparent casing 1101, plunger 1102, indicator button 1103, spring 1104 and dosing cap 1105.

[0060] Referring to Figures 8 and 9, the magnetic filter apparatus 800 comprises a housing, formed of two components, a housing back section 801 and a housing main body 802. Alternatively the magnetic filter apparatus 800 maybe a formed of a single molded housing whereby the housing back section 801 and house main body 802 are formed as a single component. The description herein will however describe by way of example and as not to obscure the features of the magnetic filter apparatus 800, a housing whereby the housing back section 801 and housing main body 802 are two separate, connectable components of the magnetic filter apparatus 800.

[0061] Referring to Figures 1, 2, 8 and 9 the housing back section 100 comprises inlet 110 and outlet 120. The inlet 110 and outlet 120 are preferably positioned at opposing ends of housing back section 110 such that the magnetic filter apparatus 800 can be fitted to an existing central heating system by mating the inlet 110 with a central heating system joint which pumps fluid in, and mating the outlet 120 with a central heating system joint to re-circulate fluid from the magnetic filter apparatus 800 out in to a central heating system. The inlet 110 is configured to receive fluid from a terminus of a central heating system so that fluid is pumped into the magnetic filter apparatus housing 801, 802. The outlet 120 is configured such that fluid can flow out of the magnetic filter apparatus 800 once it has been filtered. Ideally, the inlet 110 and outlet 120 are positioned such that the flow of water in and out of the magnetic filter apparatus 800 during operation causes a swirling motion, efficiently directing fluid flow from the inlet 110 towards a general direction of the magnet 803 for primary, first stage filtration of magnetic impurities. The preferably conical shape of the housing main body 400 facilitates fluid to flow directly over the central point of the magnet housing 1004 and along its length with low resistance.

[0062] The inlet 110 is configured to mate with a central heating system terminus and therefore will comprise a connection point 130 suitable for mating with central heating system. Commonly, central heating systems comprise connection points comprising of a nut and screw fit, or other types of male I female connections whereby complimentary connection points can slot, snap fit, screw, bolt together or similar and the inlet 110 may comprise any male and I or female connection point 130 to compliment a connection point of a central heating system. Preferably the connection point 130 will comprise a screw thread fitting.

The inlet 110 is preferably configured to be fitted to a terminus of a central heating system through which fluid is pumped therefore, the directional flow of fluid will be diverted in to the magnetic filter apparatus from its normal path. Preferably the inlet 110 and outlet 120 connection points 130, 140 are of threaded design, spigot design or of a drilled flange type, for connection to pipe circuit of a central heating system.

[0063] The flow of fluid in the magnetic filter apparatus 800 may further be assisted by the internal shape of the housing back section 100 and housing main body 802. The internal shape 150 of the housing back section 100 is preferably cylindrical in order to manipulate a cyclonic I swirling flow of water flow leaving via outlet 120. The inlet channel pipe 240 directs incoming contaminated fluid flow in the section 301, therefore contaminated fluid is directed over magnet housing sleeve 600 and magnet housing 1004. However it is apparent that the internal shape 150 of the housing back section 100 and I or housing main body 802 may be any three dimensional shape. Ideally the housing back section 100 has an internal shape 150 which is substantially cylindrical, whereas the housing main body 802 comprises a conical section, tapered towards the magnetic element end.

[0064] The inlet channel pipe exit point 160 is preferably positioned substantially towards the centre of the housing back section 100 such that the orifice of the inlet channel pipe exit point 160 is directly opposed to the tab of the magnet housing sleeve (Figure 6a, 601). This ensures that fluid pumped through the inlet channel pipe 240 is channeled directionally 170 towards the magnet 803 for maximized filtration of magnetic impurities from the incoming fluid. Preferably, the outlet fluid entry point 180 is spaced away from the inlet channel pipe exit point 160, such that there is a reduced risk of fluid that has been filtered, from either being re-filtered or from being sucked up the inlet 110. Moreover, by having the inlet channel pipe exit point 160 and outlet entry point 180 sufficiently spaced apart the risk is reduced of unfiltered fluid being pumped out of the inlet channel pipe exit point 160 from bypassing the filtration stage i.e. by not flowing directionally 170 towards the magnetic element and flowing directly directionally 190 out of the magnetic filter apparatus 800 via the outlet fluid entry point 180 and outlet 120 without undergoing filtration. In order to further facilitate the directional flow 170 of fluid through the magnetic filter apparatus 800, i.e. from the inlet channel pipe exit point 160 towards the magnet 803 and then out towards the outlet entry point 180, rather than from the inlet channel pipe exit point 160 directly towards the outlet entry point 180, the orifice of the outlet entry point 180 is preferably positioned at an angle 90 degrees to the orifice of the inlet channel pipe exit point 160, so that the pathway 170 of fluid flowing into the magnetic filter apparatus does not conflict with the pathway 190 of fluid flowing out of the magnetic filter apparatus. The outlet 120, like the inlet 110 as mentioned above, preferably comprises a connection means 140 preferably as a screw thread fitting such as to mate with an entry connection point of a central heating system for filtered fluid to be re-circulated into the central heating system.

[0065] The inlet 110 and outlet 120 may both or either comprise valves (inlet valve as per Figure 10, 1014, outlet valve not shown) such that their channels can be opened (to let fluid flow in via inlet 110 or out via outlet 120) or the valves can be closed to either prevent fluid from leaving the magnetic filter apparatus via the outlet 120 or prevent fluid from entering the magnetic filter apparatus via the in let 110.

[0066] The inlet 110 and outlet 120 of the housing back section 110 may each comprise either brass gate or ball valves.

[0067] The surface 200 of the housing back section 100 preferably has a flat surface such that the surface 200 can mate flush against the surface of the main body connection member (Figure 4a, 411) without any gaps. Preferably the housing main body (Figure 4a, 400) will have a spigot joint (Figure 10, 1015) protruding around the whole of part of the edge of the its orifice, connected to the main body connecting member (Figure 4a, 411). The spigot joint 1015 will slot into a spigot joint 220 located in the internal wall of the housing back section 100 such that the housing main body 411 and housing back section 100 have aligned orifices.

[0068] A seal is positioned on either the interior wall of the housing back section 100 towards neck holder 220 such that an air I water tight seal is formed around the edge of the housing main body 400 and housing back section 100 joint to prevent leakage of fluid from the joint at which the housing back section 100 and housing main body 400 are connected. The seal 210 is preferably in the form of a rubber, plastic or silicon 0-ring, flat edged ring, or any other commonly known washer or seal component used for leakage prevention.

[0069] An 0-ring or fiat seal provides a watertight joint.

[0070] The housing main body 400 is preferably secured to the housing back section 100 by a fixing means (Figure 8, 812), for example bolted with studs.

[0071] Once aligned, the housing main body 400 and housing back section can be secured in place by slotting bolts 812 though the housing main body 400 and housing back section 100 bolt holes 412, 260 and securing the bolts with a nut, or with a threaded nut. Ideally bolt holes 412, 260 will be located at all corners of the housing main body connecting member 411 and housing back section surface 200, however, the magnetic filter apparatus 800 may have any number of bolt holes sufficient to bolt and retain the housing main body 400 and housing back section 100 in alignment. Fastening nuts (not shown) may also be moulded in to the housing back section 100 or pressed in. the fastening nuts may be made from brass, stainless steel or other commonly used materials.

[0072] Ideally the housing back section 100 and housing main body 400 will be secured by fitting cap head allan studs in to bolt holes 412, 260. However, round head bolts, cross head screws or other commonly used fixing means could be used. Alternatively, the housing main body 400 and housing back section 100 may be connected by a screw fitting whereby the housing main body 400 has a screw neck which can be screwed into the thread of the housing back section 100, or by a snap fitting. However, the disadvantage of screw or snap fitting, as opposed to bolt fitting is that wear and tear caused by the either a snap fit or screw fit operation, would likely cause fracturing of the joints and components of the magnetic filter apparatus as well as potential fracture of joints of the central heating system if the housing back section lOOwas first secured to the central heating system before connection to the housing main body 400.

[0073] As shown in Figure 3a, 3b, 3c, 3d and 3c, the magnetic filter apparatus comprises a secondary filter 300. The secondary filter 300 is advantageous as it can block / trap/remove non-magnetic as well as magnetic particulates which are present in the fluid entering the magnetic filter apparatus 800 via the inlet 110 and separating these non-magnetic and / or magnetic impurities the from the fluid liquid/gas.

[0074] Preferably the secondary filter 300 is cylindrical in shape so as to match the shape of the internal circumference of the housing back section 100.

The shape and diameter of the secondary filter 200 ideally matches the internal shape and diameter of the housing back section 100 such that fluid flowing in and out of the magnetic filter apparatus 800, must pass through a portion of the secondary filter 300. The secondary filter 300 may be permanently fused to the internal wall of housing back section 100, or removable as a detachable component. The advantage of the secondary filter 300 being detachable is that this would allow the secondary filter 300 to be more readily removed and cleaned by the user. Although the secondary filter 300 is ideally positioned within the housing back section 1001 it could also be connectable within the housing main body 400.

[00751 The secondary filter 300 comprises a preferably centrally located funnel section 301 comprising a fluid inlet located on the front face of the secondary filter 300 facing towards the housing back section 100. The fluid inlet 302 is preferably defined by a hollow conical protrusion 304 and is aligned with the inlet channel pipe exit point 160 such that fluid entering the magnetic filter apparatus 800 via inlet 110 can only pass through the funnel section 301 into the housing main body 400 and not by any other route. The hollow conical protrusion 304 is ideally detachably connectable to inlet channel pipe exit point 160 such that fluid can not flow via any other pathway from inlet 110 in to the housing main body. The funnel section 301 further comprises a locating means 304, defined by pincers 311, located on the secondary filter back face. The advantage of the locating means 310 is such that the secondary filter funnel section 301 can align with the tab (Figure 6a, 601) of the magnet sleeve (Figure 6a, 600) such that fluid flowing from inlet 110 can flow directly towards the magnet 803 and magnet housing (Figure 10, 1004) such that the fluid can be filtered of magnetic impurities such as metal oxides and other impurities. The configuration of the secondary filter 306, means that fluid is pumped in a direction through the funnel section 301 from the inlet 110 and into the housing main body 400 towards the magnet housing (Figure 10, 1004), but not in the reverse direction. Due to the arrangement of the secondary filter funnel section 301 being directly connectable to the inlet channel pipe 240 at inlet channel pipe exit point 160, incoming unfiltered fluid has a directional flow 170 towards the magnet 803, magnet housing (Figure 10, 1004) and magnet sleeve 600 configuration such that magnetic impurities in the fluid are filtered first. By aligning the funnel section 301 with the inlet channel pipe exit point such that fluid being pumped from the inlet 160 directly flows towards the locating means 310, unfiltered fluid does not bypass the magnetic filtration stage.

Once the fluid which has flowed through the funnel section 301 into the housing main body 400, and having been filtered of magnetic impurities, the fluid must then flow in a direction back through the secondary filter 300 via the secondary filter main body 309 and towards the outlet 120 located in the housing back section 100. A further advantage of the locating means 310 is that the locating means 310 provides support to the magnet sleeve 600 and magnet housing (Figure 10, 1004) such as to prevent and / or limit undue movement of the magnet sleeve 600 and / or magnet housing when under pressure from the fluid and / or strength of the magnet being used. Prevention and / or limitation of movement of the magnet sleeve 600 and / or magnet housing during transportation and/or operation will reduce the risk of fracturing of the magnet sleeve 600 and / or magnet housing which may lead to leakage of the magnetic filter apparatus 800 or ultimately causing the magnet housing and / or magnet sleeve 600 to snap off. The locating means 310 supports the magnet housing sleeve 600 by each pincer 311 securing to a face of the magnet housing sleeve tab 601 such that the tab 601 is maintained within the locating means 310.

[0076] The secondary filter main body 309 forms a second fluid pathway 312 for fluid to move through the secondary filter 300. The directional flow of the second fluid pathway 312 through the secondary filter main body 309 is from the housing main body 400, towards the outlet 120. The secondary filter main body 309 is preferably comprised in whole or part by a mesh or gauze configuration 306. The secondary filter main body 309 preferably has a uniform discrete grid of channels or pores 308 which are large enough to allow fluid to pass through, however will capture, block and collect larger particulates such as solids and impurities found in the dirty / black water of central heating systems as identified above.

[0077] Ideally, the secondary filter main body 309 will comprise channels or pores 308 of a uniform size and dimension, however alternatively, the secondary filter 300 may comprise pores I channels 308 of differing sizes such as to collect fluid impurities of varying sizes. Preferably, each pore has a pore diameter of 1 mm to 3mm and optimally 2.5mm. The secondary filter 300 is configured to collect and filter both magnetic and non magnetic material from fluid flowing through the magnetic filter apparatus with a primary aim of blocking larger impurities flowing out of the magnetic filter apparatus via the outlet 120 and hence back into a central heating system. The secondary filter 300 can be composed of any hardwearing material for example metal, plastics or rubber.

[0078] The secondary filter main body 309 is preferably split into 4 defined segments 306, with each segment comprising a grid of pores I channels 308. In its normal operation, the secondary filter will operate at a 100% filtration level.

However, in some instances, when central heating systems have particularly impure fluid which is required to be cleaned, there may be a build up of large deposits on the secondary filter main body 309, therefore causing a blockage of the secondary filter 300 preventing fluid from flowing from the housing main body 400, through the secondary filter 300 and towards the outlet 120 via the housing back section 100. Therefore, in a preferred embodiment the secondary filter main body 309 preferably comprises at least one removable segment 307 to increase fluid flow through the secondary filter 309. The removable I detachable segment 307 may comprise a detachable fastening means 305, for example clips such that if the fluid flow rate drops in the magnetic filter apparatus due to a buildup of filtered impurities at the secondary filter main body 309, or the operator is aware from the outset that the fluid to be filtered comprises a high impurity level, then the fastening means 305 can be released, and the detachable segment 307 removed.

This will result in the exposure of a large channel (not shown) for fluid to flow at an increased rate towards the outlet 120. This will result in the secondary filter 300 operating at a 75% filtration level. It will be apparent that the number of segments may be increased or decreased as could the number of detachable segments.

[0079] Referring to Figures 4a, 4b, 4c and 4d the housing main body 400 is preferably arranged that such that the trunk 401 of the housing main body 400 is inclined away magnetic element head 402 The advantage of the incline is such that fluid introduced into the magnetic filter apparatus via either dosing inlet 403 or inlet 110 will flow under gravity towards the magnet 803, therefore providing an increase in flow rate for filtration. The magnet housing (Figure 10, 1004) is located towards the end of the housing main body 400 is positioned opposed to the housing back section 100. The housing main body 400 may be cylindrical in shape, however will preferably taper off to a conical shape towards the magnetic housing end. An advantage of a tapered housing main body 100 is that greater pressures can be achieved within the magnetic filter apparatus 800 and moulding manufacture is easier.

[0080] The magnet element head 402 and screw cap 406 form part of the magnet 803 as shown in Figure 9.

[00811 The housing main body 400 comprises a or secondary outlet 407 a drain valve (Figure 10, 1005) is preferably attached to the secondary outlet 407.

The secondary outlet 407 is preferably positioned towards a bottom end 408 of the housing main body 400 such that if the outlet 407 is opened, fluid can be removed by gravitational force from the magnetic filter apparatus without having to manipulate the apparatus by tipping or turning it. The outlet 407 may comprise a drain valve (Figure 10, 1005) which may be manually operated by hand. The valve shaft (not shown) may be released to open the valve and therefore release fluid from the apparatus and then reset to close the valve again. Alternatively the outlet 407 may not comprise a valve but a simple open channel which is closed by the presence of a screw cap (Figure 10, 1005) which can be screwed on to the outlet 407 such as to block off the channel and prevent fluid release from the apparatus.

The purpose of the outlet 407 and/or drain valve 1005 is to either be opened to remove fluid if the flow rate in the apparatus becomes to great or to provide a release of pressure in the apparatus if the pressure within the apparatus becomes too high. A further advantage of drain valve 1005 is such that when opened, the magnetic filter apparatus can be drained for cleaning or back flushing purposes or to remove fluid to allow water treatment chemicals to be easily added via the dosing inlet 403.

[0082] Referring to Figure 7, in order to monitor the pressure within the magnetic filter apparatus the apparatus may comprise a pressure indicator 700.

The pressure indicator 700 may be located on the exterior of the housing main body 400 such that it is easily visible by the operator of the magnetic filter apparatus. Ideally, the pressure tell tale indicator 700 will be located on the dosing cap 703 which is used to seal the dosing inlet 403 located on the housing main body 400. The indicator 700 will comprise a simple button means 702 which is encased within a transparent/translucent casing 701 with the lower end of the button means 702 exposed to the internal pressure of the housing main body 400 when the dosing cap 703 is secured to the dosing inlet 403. If the secondary filter 300 causes a blockage in the magnetic filter apparatus such that fluid cannot flow out of the outlet 120, then there will be a build up of pressure within the housing main body 400. The fluid pressure within the housing main body 400 will consequently exert pressure on the exposed end of the button means 702 such that the button 702 is pushed in an upwardly direction to be visible through the transparent/translucent casing 701 of the pressure tell tale indicator 700. This will result in the home-owner/operator visibly being warned when the pressure within the magnetic filter apparatus has reached a high level/requires cleaning out due to blockage of the apparatus. The button means 702 may be weighted or arranged under sufficient tension as to be raised by the fluid pressure when the pressure within the housing main body reaches a predetermined level. For example, a button 702 of light mass would rise into the transparent/translucent casing 701 at a lower pressure than a button means 702 having a higher mass. The pressure indicator / sensing device 700 may take the form of an LED warning light, a pressure gauge, digital pressure indicator or preferably a button means 702. The button means 702 is depressed within the housing main body 400 in its normal state. However when there is a pressure build up of fluid, which reaches a certain level within the magnetic filter apparatus, the pressure will force the button means 702 upwards such that the button means 702 protrudes out of the housing main body 400 in to the casing 701 of dosing cap 703 to visibly indicate to the operator that the pressure has reach a high level.

[0083] Referring to Figure 11 herein, a preferred arrangement, pressure sensing indicator arrangement 1100 will comprise a spring 404 loaded plunger 1102 located within the dosing cap 1105 of the housing main body 400 which is exposed to the internal pressures of the housing main body 400 such that when there is a pressure increase in the housing main body 400, pressure will be exerted on to the plunger 1102, such that the spring 1104 is compressed thus pushing the indicator button 1103 up in to the cavity of the translucent/transparent casing 1101 thereby indicating to the user that the pressure within the magnetic filter apparatus has increased, or has reached a critically high level. Preferably, the transparent/translucent casing 1101 is in the form of a dome shaped cap positioned on the top face of the dosing cap 1105.

[0084] The pressure sensing indicator 700 will indicate a blockage inside the housing 801, 802. If the housing 801, 802 becomes blocked, a reduction in central heating system radiator heat output will be evident leading to cool and eventually cold radiators, at this point an engineer will most likely be contacted, or the user will clean out the magnetic filter apparatus to rectify the problem. If the magnetic filter apparatus 800 is connected to a central heating system and the magnetic filter apparatus becomes blocked, this would usually indicate that the fluid being filtered has a particularly high level or high impurity content, which may indicate that the central heating system has suffered severe corrosion.

[0085] Referring to Figures 4a, 4b, 4c and 4d the housing main body 400 further comprises a dosing inlet 403. The dosing inlet 403 comprises a screw thread 409 such that the inlet channel can be closed by screwing on a dosing cap (Figure 10, 1003). The dosing inlet 403 is preferably located at a top end 410 of the housing main body 400 however could be located anywhere on the housing main body 400. The dosing inlet 403 is advantageous as this allows for the incorporation of a second fluid into the magnetic filter apparatus other than the fluid which enters through the inlet 110. This is particularly advantageous as the dosing inlet 403 allows for the incorporation of a chemical water treatment liquid to be added to the fluid being filtered. Once the chemical has been added it is miscible in the filtered fluid and therefore will enter into the central heating system via the outlet 120. This means that as well as the fluid having been filtered by the magnetic filter apparatus, the fluid will also contain a chemical to prevent subsequent rusting and corrosion of a central heating system. This problem is most common in the radiators of a central heating system.

[0086] The housing main body 400 comprises a main body connecting member 411. The main body connecting member comprises a plate 413 with bolt holes 412 which mirror the housing back section face 200, so that the housing main body 400 can be secured to the housing back section 100 to create a uniform channel between the two.

[0087] At the outer most end of the housing main body 400 is located the magnet screw cap magnet entry point 402. The magnetic element screw cap 406 forms part of the magnet construction (Figure 9, 803) and can be unscrewed from the housing main body 400 to remove the magnet for cleaning.

[0088] Referring to Figures 5a-5d the magnet screw cap 500 is composed of screw threads (not shown) on its internal surface such as to mate and screw on to the screw thread (not shown) located on the outer end of the housing main body 400. The screw cap 500 further comprises gripping means 501 on the outer surface 502 around its periphery, such that the operator can easily screw or unscrew the cap 500. The gripping means 501 may be in the form of grooves, nobules, raised bumps or any other means to assist an operator's grip of the screw cap 500. The magnet 803 is attached to the screw cap by either a screw thread connection or molded together and can be removed upon unscrewing of the screw cap 500 from the housing main body 400.

[0089] At the centre of the screw cap 500 is located the magnet attachment point 504.

[0090] The magnet housing (Figure 10, 1004) of housing main body 400 is a watertight capsule or dry pocket which is sealed with respect to the housing main body interior chamber. The magnet housing may be formed of glass filled nylon, nylon derivatives, brass, aluminum, polypropylene, Acrylontrile butadiene styrene (ABS) or any other hard wearing material which does not prevent the ability of the magnet 803 to attract magnetic impurities within the fluid being filtered via the action of magnetism. The housing main body 400 comprises at an end, a molded tubular shaped indentation which protrudes through the interior of the housing main body 400 which forms the magnet housing. The magnet 803 can be inserted into the magnet housing and secured to the magnetic filtration apparatus by screwing of the screw cap 500. The molded magnet housing acts as an air tight capsule such that fluid within the housing main body 400 cannot come into direct contact with the magnet 803 encased within the magnet housing. Preferably the magnet housing will comprise reinforcement fins or ribs located on the exterior wall of the magnet housing such as to provide support and reduce the risk of fracture of the magnet housing.

[0091] Referring to Figures 8 and 9 the magnet 803 is constructed from several neodymium rare earth magnets stacked on top of one another to form a threaded rod with a stainless steel cap at each end. In between each individual magnet is a steel air gap spacer. The individual magnets and steel air gap spacers are arranged to form a single tubular rod like structure. The individual magnets are assembled so that their north and south poles oppose each other i.e. a south pole must face a south pole and so on. The magnetic field generated must be between 5 and I 5,000G (gauss) and the magnets tested to a temperature higher than 80°C. a small hole running through the centre of each magnet and space accommodates for a threaded tie bar to hold the magnets and spacers together via the threaded caps located at each end.

[0092] The cap 804 on the magnet 803 may or may not be of a threaded construction.

[0093] The magnet 803 is inserted and retained within the magnetic housing by inserting/slotting the magnet 803 through magnet insertion point 820 through the back of the housing main body 802. Once the magnet 803 is slotted through the magnet insertion point 820, the magnet 803 is retained within the magnet housing by securing the screw cap to the housing main body 802. The magnet housing protrudes within the housing main body 802 to form a stem within the housing main body 802.

[0094] Referring to Figures 6a, 6b and 6c a magnet housing sleeve 600 is insertable over the top of the magnet housing such that the sleeve 600 can fit securely over the top of the magnet housing. The base of the housing sleeve 600 is preferably shaped as a liquid drip or collection well 602. At the tip of magnet sleeve 600 is located a tab 601 or projection to facilitate the handling, removal and insertion of the magnet housing sleeve 600 in to the magnet housing. The magnet housing sleeve well 602 is advantageous to collect magnetic compound deposits from the fluid during operation of the magnetic filter apparatus. The elongate main body or stem of housing sleeve 603 replicates the shape of the magnet housing. The housing sleeve 600/1016 acts as a protective barrier such as to prevent the magnetic housing from deteriorating. The advantage of the magnet sleeve 600/1016 being removable from the housing main body (figure 4a) 400 is such that the housing sleeve 600/1016 can be cleaned from impurity deposits without potential damage to the magnet housing 1004 / magnet 803. The magnet housing 1004 is preferably a molded part of the housing main body. The magnet housing 1004 magnet housing sleeve 600/1016 further prevents fluid contact with the magnet 803.

[0095] When the magnetic housing sleeve 600/1016 is fitted over the magnet housing, the magnet 803, magnet housing (Figure 10, 1004) and magnet housing sleeve 600/1016 all align through the centre of the housing main body 400 such that they are central and parallel with the length of the housing main body top end 410 and bottom end 400 and aligned with the secondary filter funnel section 301 and inlet channel pipe exit point 160. In operation, following flow of fluid through the secondary filter 300 in to the housing main body 400, any magnetic particulates entrained within the fluid will be attracted by the magnet 803 in the magnet housing and will be attracted to and stick' to the housing sleeve 600. Therefore the magnetic impurities will be drawn out of the fluid and to the magnetic element sleeve 600. The magnetically filtered fluid will then flow back out of the housing main body 400 through the secondary filter pores 308 on the secondary filter main body 309 and out of the magnetic filter apparatus via the outlet 120.

[00961 The magnetic filter apparatus is advantageous as it comprises a method of double filtration. The double filtration method or two stage filtration process allows for removal of a higher percentage of impurities from impure or contaminated fluid entering the system. The magnetic filter apparatus is also advantageous it provides a method of positive removal of fluid impurities by filtration as well as the option of inhibition of impurity buildup via the ability to easily add water treatment chemicals via the dosing inlet 403.

[0097] All components which make up the magnetic filter apparatus 800 must be designed to withstand pressures of more than 10 bar and heat associated with central heating systems typically of up to 120°C.

[0098] Contaminated water from a central heating system flows through the inlet valve (Figure 10, 1014) of inlet 110 and into the housing back section which re-directs the water flow through 90 degrees to through the secondary filter funnel section 301. The water then flows into the housing main body 400 towards the magnet 803. As the water flows over and around the magnet housing and sleeve 600, any magnetic particulates entrained within the solution will become trapped within the magnetic field and be attracted to the central rod magnet and collect on the magnet sleeve 600. Any other non-magnetic particulates such as polystyrene or wood or magnetic particulates which have not collected on the magnet sleeve 600 will continue in the flow of water and will be collected and blocked/trapped by the secondary filter main body 309. The filter mesh/gauze segments 306 will trap particulates that are too big to pass through the channels 308. The non-magnetic deposits are removed by the secondary filter main body 309 which is advantageous as these are most likely to cause damage within a boiler and central heating system.

Periodically the magnetic filter apparatus will need to be cleaned out and all contamination removed by simply draining down the magnetic filter apparatus using the drain valve / outlet 407. Water treatment chemicals can be quickly added to the system through the dosing inlet 403. Water samples for chemical level testing and impurity level testing can be made via draining of water from outlet 407/1005.

[0099] There are several methods for cleaning out debris from the magnetic filter apparatus: 1. Back-flush method Switch off boiler. Remove magnet housing.

The outlet 120/valve 1017 on the housing back section 100 is left open but the inlet 110/valve 1014 to the housing back section 100 must be closed (this will back-flush and wash off any debris trapped on the secondary filter main body 309). The drain-off blanking cap (Figure 10, 1019) must be removed and the drain-off valve 1005/outlet 407 opened to allow the debris trapped within the filter to be flushed out into a suitable container or bucket, until the liquid runs clear. The outlet 120 on the housing back section 100 can now be closed allowing the filter apparatus to drain down. The drain-off valve 403 can now be closed and the blanking cap replaced. The dosing inlet 403 can now be opened to add any water treatment chemicals. The dosing cap (Figure 10, 1019) can then be replaced and both the inlet 110 and outlet 120 opened.

Switch on boiler. The process may be repeated to add additional chemical treatments.

2. Strip-down method (with integral cover) Switch off boiler. Remove the magnet from its housing. Close both the inlet 110 and outlet 120. The drain-off blanking cap (Figure 10, 1019) must be removed and the drain-off valve 1005/outlet 407 opened to allow the debris and water trapped within the filter apparatus to drain off into a suitable container. The dosing inlet 403 (figure 4a) can also be opened. Remove the studs / bolts 812 holding the housing main body 802 and housing back section 801 together and separate the housing main body 802 from the housing back section 801. Lift out the magnet sleeve 600, with sludge attached, gripping the tab 601 with pliers if necessary. This can be washed or wiped clean into a suitable container then washed. The secondary filter 300 can now be removed from housing back section 801, washed clean and then replaced. Insert the housing sleeve 600 back into the housing main body 802 and re-fasten back to the housing back section 801, ensuring the drain-off valve is facing downwards. The drain-off valve 1005 can now be closed and the drain valve cap 1003 replaced on the outlet 407. Water treatment chemicals can now be added if required via the dosing inlet 403 and the dosing cap replaced. Finally open the inlet 110/1014 and outlet 120/1017. Switch on boiler.

3. Strip-down method (without integral magnet cov?jj Switch off boiler. Remove magnet. Close both inlet 110/1014 and outlet 120/1017 valves. The drain-off blanking cap must be removed and the drain-off valve/outlet 407/1005 opened to allow the debris and water trapped within the filter apparatus to drain off into a suitable container. The dosing inlet 403 can be opened. Remove the studs/bolts 812 holding the housing main body 802 and housing back section 801 together and separate the housing main body 802 from the housing back section 801.

The debris in the housing main body and that attached around the housing sleeve 600 can now be dislodged using the pliers or by hand, emptied away and washed or wiped clean into a suitable container. The secondary filter 300 can now be removed from the housing back section 802, washed clean and then replaced. Fasten the housing main body 802 to the housing back section 801, ensuring the drain-off valve is facing downwards. The drain-off valve can now be closed and the blanking cap replaced. Water treatment chemicals can now be added if required and the dosing inlet 403 closed. Finally open the inlet 110/1014 and outlet 120/1 017 valves. Switch on boiler.

[00100] All sealing faces must be cleaned for the flat sealing washer or 0-ring to ensure a good seal is made during assembly of the unit.

[00101] The secondary filter main body 309 can be adapted to provide 75% or 100% filtration of non-magnetic debris through removal of a segment to allow full flow of the fluid through that segment. This may be referred as a non-blocking full flow option.

[00102] The magnetic and non magnetic particulate filtration and dosing device or magnetic filter apparatus is disclosed for filtering fluid containing rust/magnetite and other non-magnetic particulates such as polystyrene, wood, ptfe jointing tape or jointing pastes. The magnetic filtration apparatus is also adapted to operate as a dosing device for introducing a first fluid into a wet central heating system adapted to run on a second fluid comprising a housing back section component fastened to a housing main body designed to contain a magnet in a wet or dry pocket area (magnetic element), an inlet and an outlet for connecting to a central heating system, a dosing inlet on the top of the magnetic filter apparatus for adding water treatments and a drain outlet on the bottom of the apparatus for draining offfluid during cleaning operations.

[00103] The secondary filter may comprise an internal mesh filter gauze design that may be of a variable type or may be adjustable to provide full or partial flow filtration of non-magnetic particulates.

[00104] A magnetic filter apparatus may comprise means of internal pressure detection and visible indication for the user to indicate a blockage and that cleaning is required.

[00105] The housing back section may be made of a glass filled nylon type plastic or any other plastic or any metal or any alloy.

Claims

Claims 1. A magnetic filter apparatus comprising: a housing comprising an inlet for introducing a fluid and an outlet for removal of a said fluid; and a magnet locatable within said housing configured to attract and filter magnetic particulates from a said fluid flowing through said housing; wherein said magnetic filter device further comprises a secondary filter configured to separate non-magnetic particulates from a suspension of a said fluid flowing through said housing.
2. A magnetic filter device as claimed in claim 1 wherein said housing is comprised of a housing main body connectable to a housing back section.
3. A magnetic filter apparatus as claimed in claim 2 wherein said inlet and said outlet are located on said housing back section.
4. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said housing further comprises a secondary dosing inlet for introducing a water treatment fluid into said housing.
5. A magnetic filter apparatus as claimed in any of the preceding claims wherein said housing further comprises a drain valve.
6. A magnetic filter apparatus as claimed in any of the preceding claims wherein said magnet is removable from said housing.
7. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said magnet can be encased within a magnet housing.
8. A magnetic filter apparatus as claimed in claim 7 wherein said magnet housing is locatable within a plastic sleeve.
9. A magnetic filter apparatus as claimed in claims 2 or 3 wherein said housing back section is connectable to said housing main body via at least one bolt fitting.
10. A magnetic filter apparatus as claimed in claim 3 wherein said secondary inlet and said drain valve each comprise a removable cap.
11. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said housing comprises a pressure indicating means.
12. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said secondary filter comprises a mesh structure.
13. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said secondary filter comprises a gauze structure.
14. A magnetic filter apparatus as claimed in any of the preceding claims wherein said secondary filter apparatus comprises removable segment section.
15. A magnetic filter apparatus as claimed in any of the preceding claims wherein said secondary filter apparatus comprises a variable segment section.
16. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said housing has an internal volume of less than 600 milliliters.
17. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said at least one magnet comprises at least one iron boron neodymium magnet.
18. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said at least one magnet comprises at least one cobalt magnet.
19. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said at least one magnet comprises at least one ferrite magnet.
20. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said at least one magnet comprises at least one alnico magnet.
21. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said at least one magnet comprises at least one alcomax magnet.
22. A magnet filtration apparatus as claimed in claims 2 or 3 wherein said housing further comprises a rubber seal configured to seal a joint connecting said housing back section and said housing main body in an air tight manner.AMENDMENTS TO THE CLAIMS HAVE BEEN FILED AS FOLLOWS1. A magnetic filter apparatus comprising: a housing comprising an inlet for introducing a fluid, an outlet for removal of said fluid and a magnet housing locatable within a plastic sleeve; and a magnet locatable for encasement within said magnet housing configured to attract and filter magnetic particulates from said fluid flowing through said housing; wherein said magnetic filter apparatus further comprises a secondary filter configured to separate non-magnetic parUculates from a suspension of said fluid flowing through said housing.2. A magnetic filter apparatus as claimed in claim I wherein said housing is comprised of a housing main body connectable to a housing back section.3. A magnetic filter apparatus as claimed in claim 2 wherein said inlet and said outlet are located on said housing back section.4. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said housing further comprises a secondary dosing inlet for introducing a water treatment fluid into said housing. * I I I. 45. A magnetic filter apparatus as claimed in any of the preceding * claims wherein said housing further comprises a drain valve.I.. III * S 6. A magnetic filter apparatus as claimed in any of the preceding claims wherein said magnet is removable from said housing.7. A magnetic filter apparatus as claimed in any one of the preceding claims, further comprising locating means adapted to maintain the magnet housing in position within the housing.8. A magnetic filter apparatus as claimed in claim 7 wherein said locating means comprises a plurality of pincers adapted to secure to a face of a tab of the magnet housing, such that the tab is maintained within the locating means.9. A magnetic filter apparatus as claimed in claims 2 or 3 wherein said housing back section is connectable to said housing main body via at (east one bolt fitting.10. A magnetic filter apparatus as claimed in claim 5 wherein said secondary inlet and said drain valve each comprise a removable cap.11. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said housing comprises a pressure indicating means.1 ? A magnetic filter apparatus as claimed in claim 11 wherein said pressure indicating means is mounted to said secondary inlet.13. A magnetic filter apparatus as claimed in claim 12 when depending on claim 10, wherein said removable cap comprises the pressure indicating means.14. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said secondary filter comprises a mesh structure.* e 30 15. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said secondary filter comprises a gauze structure.16. A magnetic filter apparatus as claimed in any of the preceding claims wherein said secondary filter apparatus comprises removable segment section - 17. A magnetic filter apparatus as claimed in any of the preceding claims wherein said secondary filter apparatus comprises a variable segment section.18. A magnetic filter apparatus as claimed in any of the preceding claims wherein said secondary filter comprises a plurality of pores, each pore having a diameter of 1 mm to 3mm.19. A magnetic filter apparatus as claimed in claim 18, wherein each pore has a diameter of 2.5mm.20. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said housing has an internal volume of less than 600 milliliters.21. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said at (east one magnet comprises at least one iron boron neodymium magnet.22. A magnetic filter apparatus as claimed in any one of the preceding a claims wherein said at least one magnet comprises at least one cobalt magnet. S *-23. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said at least one magnet comprises at least one ferrite magnet. 5. a24. A magnetic filter apparatus as claimed in any one of the preceding claims wherein said at least one magnet comprises at least one alnico magnet.25. A magnet filtration apparatus as claimed in claims 2 or 3 wherein said housing further comprises a rubber seal configured to seal a joint connecting said housing back section and said housing main body in an air tight manner. S. S * S S * S.I* *1**S * I *50 I * SI S. III * IIS*tSIII S