WO1996004062A1 - A filter, in particular a magnet filter for continuous service - Google Patents

A filter, in particular a magnet filter for continuous service Download PDF

Info

Publication number
WO1996004062A1
WO1996004062A1 PCT/DK1995/000321 DK9500321W WO9604062A1 WO 1996004062 A1 WO1996004062 A1 WO 1996004062A1 DK 9500321 W DK9500321 W DK 9500321W WO 9604062 A1 WO9604062 A1 WO 9604062A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter unit
valve
characteristic
pressure
Prior art date
Application number
PCT/DK1995/000321
Other languages
French (fr)
Inventor
Flemming Christiansen
Original Assignee
Heco International A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heco International A/S filed Critical Heco International A/S
Priority to AU30749/95A priority Critical patent/AU3074995A/en
Publication of WO1996004062A1 publication Critical patent/WO1996004062A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/92—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06—Filters making use of electricity or magnetism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/153—Anti-leakage or anti-return valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/0332—Component parts; Auxiliary operations characterised by the magnetic circuit using permanent magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/28—Magnetic plugs and dipsticks
    • B03C1/286—Magnetic plugs and dipsticks disposed at the inner circumference of a recipient, e.g. magnetic drain bolt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/16—Valves
    • B01D2201/167—Single-way valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/28—Parts being designed to be removed for cleaning purposes

Definitions

  • ⁇ fj-lter in particular a magnet filter for con ⁇ tinuous service.
  • the invention concerns a filter, in particular a magnet filter for continuous service comprising a re ⁇ placeable filter unit and cut-off valves.
  • iron oxides are continu ⁇ ously precipitated because of absorption of oxygen from the circulating water, and these with other particles are deposited as sludge on heating surfaces and in radi ⁇ ators and in pipework which reduces heat transmission.
  • the shunt path is established between the side branch of a three-way valve which is fitted between the feeder line and the magnetic filter, and a one-way valve which is connected at the drain line of the filter.
  • a construction of this type permits that the filter unit, preferably comprising a magnetic filter, is cut off just by turning the three— way valve to its blocking position. The one-way valve prevents water flow the in opposite direction. Thereupon the filter unit may be removed and cleaned while the heating system is still operational, since a short-term lack of filtering is without any practical significance, no matter if the shunt path allows the same or approxi ⁇ mately the same fluid flow as the main passage of the valve.
  • the shunt path By forming the shunt path as a channel in the filter housing, the filter can be made as a compact unit, ready for mounting on a pipe line.
  • the pressure dependent valve may be adjusted from the outside to the maximum pressure drop permitted across the magnet fil ⁇ ter.
  • the pressure dependent valve has means for indicating its position, whereby it is possible continuously to survey the condition of the filter. This enables the best use of a magnet filter because the indication which may be mechanical or elec ⁇ trical may be used to indicate that it is time to clean the filter.
  • the handle for the three-way valve is fitted in such a way that in the open position it physically blocks the removal of the filter unit.
  • the present embodiment completely prevents dangerous operational errors.
  • Fig. 1 shows a complete filter according to the invention from the outside, but with a section cut away
  • Fig. 2 shows a horizontal section through the fil ⁇ ter housing during normal performance
  • Fig. 3 shows a similar horizontal section through the filter in the condition where the shunt path is in operation because of a too large back pressure in the filter unit proper
  • Fig. 4 shows a vertical section through a complete filter.
  • a filter for installation in e.g. a central heating system or a district heating system comprises a feed line 1, a drain line 2, and during normal performance the filtering is performed in the filter unit 3.
  • This unit is closed at the top by means of a cover 4.
  • a valve 5 permits water to pass from the feed 1 through the filter unit 3 and out the drain 2 in passing a one-way valve 6 which in this embodiment is made as a spring loaded axially displaceable disc but which may in effect be made in the form of a hinged flap or a ball.
  • this one-way valve 6 prevents system water to enter the filter.
  • a path or channel 7 is established bypassing the filter unit, and this is used when the filter unit is due for a change, in that the valve 5 is turned 90o counter-clockwise by means of the handle 8.
  • the ball of the valve 5 is turned into such a position that feed to the filter unit 3 is blocked, while the water may pass through a spring loaded valve 9, through the bypass channel 7, via an opening 10 and to the drain line 2.
  • the handle 8 is such that the cover 4 can ⁇ not be loosened or removed if it is not turned to the position where the flow through the filter is completely blocked and the filter chamber is pressureless.
  • the position of the handle indicates immediately if the main passage of the valve is open or closed. Even if the main passage of the valve is closed, the cover 4 cannot immediately be removed since the filter chamber is pressurized.
  • the cover is of the bayonet-type - here with two diametrically outwardly projecting parts 20 with a groove, so that the cover can be turned into a locking position with the two bolts 21.
  • the upper side is provided with an undercutting for the bolt heads.
  • the cover must be pres ⁇ sed inwards a bit, i.e. against the fluid pressure, until the bolt heads are free of the undercuttings. In order to do this, the filter chamber must be released from pressure e.g.
  • Fig. 2 it is shown how the water flow passes through the filter during normal performance, and it will be noted that in this embodiment the feed to the filter unit occurs centrally, and the water is drained radially and fed onwards.
  • the spring loaded valve has the special importance according to the invention that in this position of the valve 5 it will open in case the back pressure from the filter unit becomes too great. Thereby the water will still circulate in the heating system, passing through the channel 7, even though it gets progressively less filtered.
  • the back pressure which must be exceeded in order for the valve 9 to open may be adjusted by a change on the spring 11.
  • Fig. 3 is illustrating where the ball of valve 5 is turned for complete blocking of the feed-line of the filter unit. Here the full flow of water occurs through the channel 7 bypassing the filter unit 3.
  • the filter unit 3 is shown fitted in the filter below the cover 4.
  • the filter unit is a combination of a filter bag 15 which is held by water pressure against an open support 16, and magnetic filter 17 consisting of alternating discs of magnetized material and of pole pieces, surrounded by a guide surface 18 which forces the water against the magnetic unit and increases the effect, even in the case of a partially clogged filter.
  • the filtered water passes the support 16 and is led to the one-way valve 6 via the slit 19.
  • the adjustment of the spring 11 can, before the valve opens, occur from out ⁇ side during adjustment of the filter in the heating system, e.g. by turning the cap 12.
  • An indicating window (not shown) in the cap may make visible the pin 9, around which the spring 11 is fitted. In this manner a visual indication is obtained for the opening of the valve signifying clogging of the filter unit.
  • an electrical signalling device may be fitted.
  • the pressure drop across the filter may be determined by comparison of pressure measurements at the bosses 13 and 14, and the adjustment of the tension of the spring 11 to a particular back pressure may occur in that the valve 5 is turned to such a position that a partial or almost complete blocking of the feed to the filter unit 3 is created, until the pressure difference at the bosses 13 and 14 corresponds to values obtained from experience with clogged filter units 3, whereupon the spring 11 is adjusted until the pressure difference no longer changes, even if the valve 5 is turned to a complete blocking of the feed to the filter unit.
  • the invention is described above with reference to a magnet filter and in an embodiment combined with a filter bag for particulate material which is particular ⁇ ly prone to clogging because of its ability to collect many particles.
  • the water circuit described having exactly the same function may be used in case the filter consists of only a filter bag, or even a sieve for the removal of larger particles from circulation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Known filters for central and district heating systems must be cleaned frequently and further there is risk that the filter may clog completely. The invention solves this problem and allows in addition removal and cleaning of the filter unit while the heating system is still operational. When the pressure drop is being too high a spring loaded valve (9) permits the circulating water to pass through a channel (7) by-passing the filter unit (3). When the valve (5) is turned in its blocking position then the filter unit (3) is unpressurized as a one-way valve (6) prevents pressure from the outlet side. In this position the filter unit may be removed and the circulation is maintained through the channel (7).

Description

Λ fj-lter, in particular a magnet filter for con¬ tinuous service.
The invention concerns a filter, in particular a magnet filter for continuous service comprising a re¬ placeable filter unit and cut-off valves.
In central heating systems iron oxides are continu¬ ously precipitated because of absorption of oxygen from the circulating water, and these with other particles are deposited as sludge on heating surfaces and in radi¬ ators and in pipework which reduces heat transmission.
It is known to fit particle filters and magnet filters, and they have to be cleaned regularly in order that circulation is not impeded which would require a greater power from the circulation pump. It was formerly common to clean filters in connection with the end of a central heating season, but it turns out that installa¬ tions are individual with respect to the speed with which the filters are clogged, and known filters are frequently dimensioned with an excess capacity. On the other hand, complete clogging must be avoided, in parti¬ cular because it has been noted that this is frequently accompanied by harmful shock waves which may burst fil¬ ters as well as other components installed in the heat¬ ing system.
It is the purpose of the invention to provide a magnetic filter of the kind specified above which does not display the disadvantages of known systems.
This is obtained by means of a filter which is particular in that it comprises a shunt path around the filter connected by means of a pressure dependent valve. Hence a safe protection is obtained, since the pressure of the circulation pump will allow the circulating water to bypass the filter in accordance with its clogging. The filter function is gradually reduced but the harmful effects of excess pressure are completely avoided and the user is still supplied with heat.
In an advantageous embodiment the shunt path is established between the side branch of a three-way valve which is fitted between the feeder line and the magnetic filter, and a one-way valve which is connected at the drain line of the filter. A construction of this type permits that the filter unit, preferably comprising a magnetic filter, is cut off just by turning the three— way valve to its blocking position. The one-way valve prevents water flow the in opposite direction. Thereupon the filter unit may be removed and cleaned while the heating system is still operational, since a short-term lack of filtering is without any practical significance, no matter if the shunt path allows the same or approxi¬ mately the same fluid flow as the main passage of the valve. By forming the shunt path as a channel in the filter housing, the filter can be made as a compact unit, ready for mounting on a pipe line.
In a further advantageous embodiment the pressure dependent valve may be adjusted from the outside to the maximum pressure drop permitted across the magnet fil¬ ter. Hereby the further advantage is obtained that ad¬ justment of the filter system may occur in situ, and that the same model may be fitted to many different central heating systems.
In a further development the pressure dependent valve has means for indicating its position, whereby it is possible continuously to survey the condition of the filter. This enables the best use of a magnet filter because the indication which may be mechanical or elec¬ trical may be used to indicate that it is time to clean the filter.
In a further advantageous embodiment the handle for the three-way valve is fitted in such a way that in the open position it physically blocks the removal of the filter unit. This construction makes it possible to simplify the removal of the filter unit so as to be performed without special tools, a possibility which would otherwise create a risk of scalding in case it 6/04062
occurred during circulation and a pressurised filter. The present embodiment completely prevents dangerous operational errors.
The invention will be described in greater detail in the following with reference to the drawing, in which
Fig. 1 shows a complete filter according to the invention from the outside, but with a section cut away,
Fig. 2 shows a horizontal section through the fil¬ ter housing during normal performance,
Fig. 3 shows a similar horizontal section through the filter in the condition where the shunt path is in operation because of a too large back pressure in the filter unit proper, and
Fig. 4 shows a vertical section through a complete filter.
In Fig. 1 is shown a filter for installation in e.g. a central heating system or a district heating system. It comprises a feed line 1, a drain line 2, and during normal performance the filtering is performed in the filter unit 3. This unit is closed at the top by means of a cover 4. During normal performance a valve 5 permits water to pass from the feed 1 through the filter unit 3 and out the drain 2 in passing a one-way valve 6 which in this embodiment is made as a spring loaded axially displaceable disc but which may in effect be made in the form of a hinged flap or a ball. In case the magnet filter should lose its pressure this one-way valve 6 prevents system water to enter the filter.
A path or channel 7 is established bypassing the filter unit, and this is used when the filter unit is due for a change, in that the valve 5 is turned 90o counter-clockwise by means of the handle 8. Hereby the ball of the valve 5 is turned into such a position that feed to the filter unit 3 is blocked, while the water may pass through a spring loaded valve 9, through the bypass channel 7, via an opening 10 and to the drain line 2. In this case no filtering is taking place, but change of the active components of the filter unit may take place while the heating system is active. The placement of the handle 8 is such that the cover 4 can¬ not be loosened or removed if it is not turned to the position where the flow through the filter is completely blocked and the filter chamber is pressureless.
The position of the handle indicates immediately if the main passage of the valve is open or closed. Even if the main passage of the valve is closed, the cover 4 cannot immediately be removed since the filter chamber is pressurized. The cover is of the bayonet-type - here with two diametrically outwardly projecting parts 20 with a groove, so that the cover can be turned into a locking position with the two bolts 21. In connection with the grooves the upper side is provided with an undercutting for the bolt heads. The cover must be pres¬ sed inwards a bit, i.e. against the fluid pressure, until the bolt heads are free of the undercuttings. In order to do this, the filter chamber must be released from pressure e.g. by loosening of a bottom screw, and first thereafter can the cover be loosened and removed. If not before, the counter valve 6 in the drain will then close by the pressure release. The undercuttings do not need to be particular deep, whereby there is no need for specially shaped seals; the inward pressing of the cover can directly be absorbed in the usual seals that are released from pressure during the operation.
In Fig. 2 it is shown how the water flow passes through the filter during normal performance, and it will be noted that in this embodiment the feed to the filter unit occurs centrally, and the water is drained radially and fed onwards. The spring loaded valve has the special importance according to the invention that in this position of the valve 5 it will open in case the back pressure from the filter unit becomes too great. Thereby the water will still circulate in the heating system, passing through the channel 7, even though it gets progressively less filtered. The back pressure which must be exceeded in order for the valve 9 to open may be adjusted by a change on the spring 11.
Fig. 3 is illustrating where the ball of valve 5 is turned for complete blocking of the feed-line of the filter unit. Here the full flow of water occurs through the channel 7 bypassing the filter unit 3.
In Fig. 4 the filter unit 3 is shown fitted in the filter below the cover 4. In the embodiment shown the filter unit is a combination of a filter bag 15 which is held by water pressure against an open support 16, and magnetic filter 17 consisting of alternating discs of magnetized material and of pole pieces, surrounded by a guide surface 18 which forces the water against the magnetic unit and increases the effect, even in the case of a partially clogged filter. The filtered water passes the support 16 and is led to the one-way valve 6 via the slit 19.
In a further development the adjustment of the spring 11 can, before the valve opens, occur from out¬ side during adjustment of the filter in the heating system, e.g. by turning the cap 12. An indicating window (not shown) in the cap may make visible the pin 9, around which the spring 11 is fitted. In this manner a visual indication is obtained for the opening of the valve signifying clogging of the filter unit. Alterna¬ tively an electrical signalling device may be fitted.
The pressure drop across the filter (the back pres¬ sure) may be determined by comparison of pressure measurements at the bosses 13 and 14, and the adjustment of the tension of the spring 11 to a particular back pressure may occur in that the valve 5 is turned to such a position that a partial or almost complete blocking of the feed to the filter unit 3 is created, until the pressure difference at the bosses 13 and 14 corresponds to values obtained from experience with clogged filter units 3, whereupon the spring 11 is adjusted until the pressure difference no longer changes, even if the valve 5 is turned to a complete blocking of the feed to the filter unit.
The invention is described above with reference to a magnet filter and in an embodiment combined with a filter bag for particulate material which is particular¬ ly prone to clogging because of its ability to collect many particles. However, the water circuit described having exactly the same function may be used in case the filter consists of only a filter bag, or even a sieve for the removal of larger particles from circulation.
It is understood that the invention is not limited to central and district heating installations but is generally usable in fluid installations.

Claims

P A T E N T C L A I M S:
1. A filter, in particular a magnetic filter, for continuous use comprising a replaceable filter unit (15, 17) and valves for cutting off, characteristic in that it comprises a shunt line (7) bypassing the filter unit, connected through a pressure dependent valve (9) .
2. A filter according to claim 1, characteristic in that the shunt line is formed as a channel (7) in the filter housing.
3. A filter according to claims 1 or 2, charac¬ teristic in that the shunt line (7) is established be¬ tween the side branch of a three-way valve (5) which is fitted between the feed line (1) and the filter unit (15, 17) and a one-way valve (6) which is fitted to the drain line (2) for the filter unit.
4. A filter according to claim 1, characteristic in that the pressure dependent valve (9) may be adjustable from the outside to the maximum permissible back pres¬ sure of the filter unit (15, 17).
5. A filter according to one of the claims 1 or 3, characteristic in that the pressure dependent valve (9) has means for indicating its position.
6. A filter according to claim 3, characteristic in that the operating handle (8) for the three-way valve (5) is fitted so as to prevent the removal of the filter unit (15,17) when the three-way valve is in its open position.
7. A filter according to claims 1 or 3, charac¬ teristic in that it is built so that a cover (4) for the removal of the filter unit (15, 17) in the filter hous¬ ing is held in a locking position by the fluid pressure in the filter chamber and first is removable when the chamber is released of pressure.
8. A filter according to claim 7, characteristic in that the cover (4) has outwardly projecting posts (20) with grooves for locking with the upwardly projecting bolts (21) and where there in connection with the grooves are undercuttings for receiving the bolt heads.
PCT/DK1995/000321 1994-08-03 1995-08-03 A filter, in particular a magnet filter for continuous service WO1996004062A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU30749/95A AU3074995A (en) 1994-08-03 1995-08-03 A filter, in particular a magnet filter for continuous service

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK0906/94 1994-08-03
DK090694A DK90694A (en) 1994-08-03 1994-08-03 Filters, especially magnetic filters, for continuous operation

Publications (1)

Publication Number Publication Date
WO1996004062A1 true WO1996004062A1 (en) 1996-02-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1995/000321 WO1996004062A1 (en) 1994-08-03 1995-08-03 A filter, in particular a magnet filter for continuous service

Country Status (4)

Country Link
AU (1) AU3074995A (en)
DK (1) DK90694A (en)
PL (1) PL309809A1 (en)
WO (1) WO1996004062A1 (en)

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EP1748234A1 (en) * 2005-07-26 2007-01-31 Effebi S.p.A. Valve body for hydraulic systems
IT201600119549A1 (en) * 2016-11-25 2018-05-25 Euroacque S R L DEFANGER FILTER DEVICE
JP2018153771A (en) * 2017-03-21 2018-10-04 トリニティ工業株式会社 Magnet filter
IT201700050230A1 (en) * 2017-05-09 2018-11-09 Caleffi Spa MAGNETIC SEPARATOR WITH INCORPORATED STOP VALVE, FOR HEATING SYSTEMS.
EP3288661A4 (en) * 2015-04-29 2018-12-19 Fleenor Manufacturing, Inc. Filter element with magnetic array
IT201700084635A1 (en) * 2017-07-25 2019-01-25 Euroacque S R L DEFANGER FILTER DEVICE
GB2565321A (en) * 2017-08-10 2019-02-13 Adey Holdings 2008 Ltd Magnetic filter for a central heating system
IT201800002685A1 (en) * 2018-02-14 2019-08-14 Ivar Spa DEVICE AND METHOD FOR FILTRATION OF A CIRCULATING FLUID IN A THERMO-HYDRAULIC SYSTEM
IT201800020302A1 (en) * 2018-12-20 2020-06-20 Rbm Ibox S R L FILTER FOR THE TREATMENT OF A FLUID IN A PIPE OF A HEATING AND / OR COOLING SYSTEM, IN PARTICULAR OF A DOMESTIC AND / OR INDUSTRIAL TYPE
IT201800020332A1 (en) * 2018-12-20 2020-06-20 Rbm Ibox S R L FILTER FOR THE TREATMENT OF A FLUID IN A HEATING AND / OR COOLING SYSTEM, IN PARTICULAR OF A DOMESTIC AND / OR INDUSTRIAL TYPE
CN111495003A (en) * 2019-01-31 2020-08-07 艾格赛尔工业公司 Filter for liquid or viscous products and spraying device comprising such a filter
US20210008466A1 (en) * 2018-03-29 2021-01-14 Flamco B.V. Removal device with flow control
GB2589615A (en) * 2019-12-05 2021-06-09 Global Energy Systems & Tech Limited Filter
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EP1748234A1 (en) * 2005-07-26 2007-01-31 Effebi S.p.A. Valve body for hydraulic systems
EP3288661A4 (en) * 2015-04-29 2018-12-19 Fleenor Manufacturing, Inc. Filter element with magnetic array
IT201600119549A1 (en) * 2016-11-25 2018-05-25 Euroacque S R L DEFANGER FILTER DEVICE
EP3332855A1 (en) 2016-11-25 2018-06-13 Euroacque S.r.l. Filtration and dirt-separation device
JP2018153771A (en) * 2017-03-21 2018-10-04 トリニティ工業株式会社 Magnet filter
IT201700050230A1 (en) * 2017-05-09 2018-11-09 Caleffi Spa MAGNETIC SEPARATOR WITH INCORPORATED STOP VALVE, FOR HEATING SYSTEMS.
WO2018207083A1 (en) * 2017-05-09 2018-11-15 Caleffi S.P.A. Magnetic sludge separator for heating plants
EP3449995A1 (en) 2017-07-25 2019-03-06 Euroacque S.r.l. A sludge filter device
IT201700084635A1 (en) * 2017-07-25 2019-01-25 Euroacque S R L DEFANGER FILTER DEVICE
CN111201402A (en) * 2017-08-10 2020-05-26 阿迪控股(2008)有限公司 Magnetic filter of central heating system
GB2565321B (en) * 2017-08-10 2021-06-02 Adey Holdings 2008 Ltd Magnetic filter for a central heating system
WO2019029899A1 (en) * 2017-08-10 2019-02-14 Adey Holdings (2008) Limited Magnetic filter for a central heating system
GB2565321A (en) * 2017-08-10 2019-02-13 Adey Holdings 2008 Ltd Magnetic filter for a central heating system
CN109381914A (en) * 2017-08-10 2019-02-26 阿迪控股(2008)有限公司 The magnetic filter of central heating systems
US11517916B2 (en) 2017-08-10 2022-12-06 Adey Holdings (2008) Limited Magnetic filter for a central heating system
IT201800002685A1 (en) * 2018-02-14 2019-08-14 Ivar Spa DEVICE AND METHOD FOR FILTRATION OF A CIRCULATING FLUID IN A THERMO-HYDRAULIC SYSTEM
WO2019159039A1 (en) * 2018-02-14 2019-08-22 I.V.A.R. S.P.A. Device and method for filtering a fluid circulating in a plumbing and heating system
EA038125B1 (en) * 2018-02-14 2021-07-09 И.В.А.Р. С.П.А. Device and method for filtering a fluid circulating in a plumbing and heating system
US11951418B2 (en) * 2018-03-29 2024-04-09 Flamco B.V. Removal device with flow control
US20210008466A1 (en) * 2018-03-29 2021-01-14 Flamco B.V. Removal device with flow control
IT201800020302A1 (en) * 2018-12-20 2020-06-20 Rbm Ibox S R L FILTER FOR THE TREATMENT OF A FLUID IN A PIPE OF A HEATING AND / OR COOLING SYSTEM, IN PARTICULAR OF A DOMESTIC AND / OR INDUSTRIAL TYPE
WO2020128954A1 (en) * 2018-12-20 2020-06-25 Rbm Ibox S.R.L. Filter for the treatment of a fluid in a heating and/or cooling system
US11826679B2 (en) 2018-12-20 2023-11-28 R.B.M. S.P.A. Filter for the treatment of a fluid in a heating and/or cooling system
IT201800020332A1 (en) * 2018-12-20 2020-06-20 Rbm Ibox S R L FILTER FOR THE TREATMENT OF A FLUID IN A HEATING AND / OR COOLING SYSTEM, IN PARTICULAR OF A DOMESTIC AND / OR INDUSTRIAL TYPE
CN111495003A (en) * 2019-01-31 2020-08-07 艾格赛尔工业公司 Filter for liquid or viscous products and spraying device comprising such a filter
CN111495003B (en) * 2019-01-31 2023-04-28 艾格赛尔工业公司 Filter for liquid or viscous products and spraying device comprising such a filter
GB2589615A (en) * 2019-12-05 2021-06-09 Global Energy Systems & Tech Limited Filter
DE102020200588A1 (en) 2020-01-20 2021-07-22 Robert Bosch Gesellschaft mit beschränkter Haftung Liquid filter
EP4091693A1 (en) * 2021-05-21 2022-11-23 Hamilton Sundstrand Corporation Filter valve assembly
US20220370936A1 (en) * 2021-05-21 2022-11-24 Hamilton Sundstrand Corporation Filter valve assembly
WO2024004038A1 (en) * 2022-06-28 2024-01-04 株式会社ワイ・ジェー・エス． Foreign matter removal device

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DK90694A (en) 1996-02-04
AU3074995A (en) 1996-03-04
PL309809A1 (en) 1996-02-05

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