WO1995014521A1 - Filtereinheit für fluide - Google Patents
Filtereinheit für fluide Download PDFInfo
- Publication number
- WO1995014521A1 WO1995014521A1 PCT/IB1994/000344 IB9400344W WO9514521A1 WO 1995014521 A1 WO1995014521 A1 WO 1995014521A1 IB 9400344 W IB9400344 W IB 9400344W WO 9514521 A1 WO9514521 A1 WO 9514521A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- fluid
- cleaning
- filter unit
- unit according
- Prior art date
Links
- 239000012530 fluid Substances 0.000 title claims description 33
- 239000000919 ceramic Substances 0.000 claims abstract description 31
- 238000004140 cleaning Methods 0.000 claims description 40
- 238000001914 filtration Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 38
- 239000003651 drinking water Substances 0.000 description 19
- 235000020188 drinking water Nutrition 0.000 description 19
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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
- B01D29/31—Self-supporting filtering elements
- B01D29/35—Self-supporting filtering elements arranged for outward flow filtration
- B01D29/356—Self-supporting filtering elements arranged for outward flow filtration open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
-
- 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
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- 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
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
-
- 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
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6423—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a translational movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/02—Filtering elements having a conical form
Definitions
- the present invention relates to a filter unit for fluids with a filter housing and filters mounted therein, and each with at least one fluid supply line, a discharge line for the cleaned fluid and a discharge line for unpurified fluid, all of which are provided with valves.
- Filter units of the type mentioned have been known on the market for years. In particular, reference is made here to the various drinking water filter designs from Katadyn Kunststoff AG in CH-8304 Wallisellen.
- the actual filtration in these drinking water filters takes place with filter elements which are designed as heterocapillary ceramic filters and have a cylindrical shape.
- the hollow cylindrical filter is operated in such a way that the unfiltered drinking water lies on the outside of the cylinder jacket surface and flows through the heterocapillary cylinder wall into the hollow cylinder.
- This is filled with silver quartz granulate and closed at the top and bottom with a cap, the lower cap being an outlet for the purified drinking water having.
- One or more of such ceramic filter elements are attached to an intermediate plate which is sealingly held in the filter housing.
- the raw water is thus above this intermediate plate and the purified drinking water below it.
- the raw water contains both organic and inorganic contaminants, which accumulate on the outer wall of the ceramic filter element during filtration. So that the filter elements do not become clogged and there is no climate for extreme bacterial growth, the individual filter elements must be cleaned at regular intervals. To do this, the filtering operation must be stopped, the filter housing opened and each individual filter element cleaned by hand.
- such drinking water filters are provided with a separate, hydraulically operated cleaning brush, which is mounted on a flexible line outside the filter housing. When the filter housing is open, the brush is placed over each individual filter element by hand and then brushed and rinsed off. Depending on the size of the drinking water filter, up to over fifty individual filter elements have to be cleaned. This usually happens during normal working hours and therefore leads to corresponding business interruptions in restaurants, hotels or beverage bottling factories.
- the same problem is of course also known for other fluids.
- the invention is not corresponding limited to drinking water filtration.
- the construction as a drinking water filter system is described, but can also be used for other fluids without modifications.
- FIG. 1 shows a longitudinal section through a filter unit for fluids with an automatic cleaning
- Figure 2 shows a partial section of such a filter unit in the drive area, which is provided for manual actuation.
- Figure 3 shows a partial section of such a filter unit in the drive area, which can be actuated by the applied fluid pressure, but works without a turbine.
- filter unit with a single ceramic filter was drawn.
- filter units with any number of ceramic filters constructed in the same way can be realized on the same principle.
- the filter unit according to the invention for fluids is described in detail in the following description, a filter unit for drinking water being selected as an example.
- the size of the drinking water filter unit is determined by the filter housing 1.
- the filter can be a ceramic filter, a heterocapillary ceramic filter or another filter made of a relatively solid material. If the term ceramic filter is used below, this is only a preferred form, without being limited to this.
- the filter housing which can have any shape, is divided into several zones by several generally horizontally running plates. The entire filter housing 1 is divided into an upper part and a lower part in the region of a flange 6. At the top, the filter housing 1 can be provided with a pivotable cover 2, which enables free access to a control zone. This control zone is bounded towards the bottom by a cover plate 3.
- the drive zone 4 which in turn is bounded at the bottom by a bearing plate 5.
- the actual filter zone 8 in which the filter 7 is arranged.
- the ceramic filter 7 rests with its upper edge area on a filter carrier 16 and in the lower area on an intermediate plate 9.
- the ceramic filter 7 is held both in the filter carrier 16 and in the intermediate plate 9 in a sealing manner.
- Below the intermediate plate 9 is the discharge area 17 in which a dirty water funnel 10 is arranged.
- the dirty water funnel 10 opens into the dirty water outlet 18 at the lower end of the filter housing 1.
- the dirty water outlet 18 can be opened by means of a dirty water shut-off valve 15 open and close. Depending on the version, this valve can be operated manually or electrically.
- the ceramic filter 7 has the shape of a conical cylinder and is made of a heterocapillary ceramic. To increase the strength, the ceramic filter can be reinforced with a metal or plastic mesh.
- the filtering zone 8 between the filter carrier 16 and the intermediate plate 9 is filled with an antibacterial agent, for example silver quartz granulate.
- the silver quartz granulate can be introduced into the filter housing 1 via the filler neck 19.
- the raw water to be cleaned is passed through the raw water connection 11 into the drive zone 4 and from there is introduced into the filtering zone 8 via a mechanically or electrically controllable deflection valve.
- the dirty water shut-off valve 15 is closed, and the inflowing raw water fills the dirty water funnel 10 and the conical cylinder of the ceramic filter 7 up to a maximum in the area just below the bearing plate 5.
- the raw water is now against the inner wall of the ceramic filter 7 and penetrates it Filter until it reaches the area between the ceramic filter and the filter housing. It can flow out of this area as purified drinking water through the drinking water outlet 13.
- the drinking water outlet 13 can in turn be provided with a closing valve 14 which can be operated manually or can be electrically actuated. If the closing valve 14 can be actuated electrically, it can also be arranged within the filter housing. Of course, however, the closing valve 14 can also be fitted outside the filter housing 1.
- the raw water connection 11 can also be introduced directly below the bearing plate 5 into the filtration zone 8 above the filter carrier 16.
- the diverter valve 12 is omitted and instead a simple closing valve can be fitted outside the filter housing 1.
- a cylindrical brush 20 is arranged in the filter housing 1, which passes through the bearing plate 5 with its central axis of rotation 21 and is rotatably held in a bearing 22.
- the shape of the conical brush 20 is designed so that it is accommodated exactly in the conical cylindrical shape of the ceramic filter 7. So that the brush does not constantly rest on the ceramic filter 7 and thus influence its function, the brush in the bearing 22 and in the bearing plate 5 is kept movable in the axial direction. In the filtration position, the brush 20 is thus in an upper position, in which it does not come into contact with the ceramic filter.
- FIG. 1 The preferred embodiment according to FIG. 1 is explained in more detail below, before the simplified, manual embodiment according to FIG. 2 is discussed.
- a spring 24 which acts on the axis 21 of the brush 20, it is held in an upper, the filtering position.
- the spring 24 is designed as a tension spring or with a known force reversal construction by means of a compression spring. If the brush 20 is to be brought into the cleaning position, the lower position, then the diverter valve 12 must be switched over so that, on the one hand, the water pressure above the axis of rotation 21 presses on it and, against the force of the spring 24, brings the brush 20 into the cleaning position .
- the drive shaft 21 is mounted in a closed bushing, which serves as a hydraulic cylinder 23.
- the dirty water valve 15 is of course open so that the contaminated raw water can flow out.
- the closing valve 14 of the drinking water outlet 13 can remain open during this cleaning process, because the filtering function is not influenced qualitatively even during the cleaning process. During the cleaning process, however, part of the cleaned drinking water will flow through the filter in the opposite direction from the area between the outer lateral surface of the ceramic filter 7 and the filter housing 1 and partially empty it.
- the closing valve 14 can be closed. The closing of the valve 14 can be controlled, for example, via a water level probe.
- the diverter valve 12 is rotated back into the filtering position and the raw water goes directly back into the filtering zone.
- the spring 24 pulls the brush 20 back into the filtering position and the dirty water shut-off valve 15 is closed. If in the meantime the closing valve 14 has closed during the cleaning process, this is also opened again. This completes a cleaning cycle.
- the cleaning process can be automated, for which purpose an electrical control 26 is arranged under the cover 2 on the cover plate 3, which automatically controls the sequence, for example, via an integrated or external circuit.
- the valves 12, 14 and 15 must of course be electrically operable. Accordingly, the supply and a possible transformer is housed in a watertight and insulated box 27.
- the raw water connection 11 is introduced directly into the filtration zone 8.
- a simple, manually operated closing valve 110 is used here, which is arranged outside the filter housing 1.
- the axis of rotation 21 is penetrated here by a driver pin 29 which protrudes radially from the axis of rotation 21. This driver pin 29 engages in a slideway in the bearing 32.
- the slideway is divided into three sectors, namely an upper annular track 34, a lower annular track 35 and a helically wound track 33 which connects the two ring tracks 34 and 35 to one another.
- a spring 24 which presses the cleaning brush 20 into an upper, filtering position.
- the spring 24, which is designed here as a compression spring, lies indirectly on the bearing plate 5 and presses on a collar 36 which is fixedly connected to the drive shaft 21.
- the drive shaft 21 is provided, for example, with an inner square or hexagon, into which a hand crank 31 can be inserted.
- FIG. 3 Another variant of the brush actuation is shown in FIG. 3. Via a valve, not shown, the Uncleaned liquid, for example the raw water, are fed directly to the filter unit via the feed line 11 or via an actuation line connection 31.
- the Uncleaned liquid for example the raw water
- the brush 7 is also moved translationally up and down and set in rotation.
- the fluid to be cleaned is present via line 11 and flows into a cylinder 32, which is emptied at the bottom via a pressure relief valve 33.
- a piston 34 which can be acted upon from both sides is movably mounted in the cylinder.
- the piston 34 in the cylinder 32 is pressed upwards.
- the flow pattern is shown with solid arrows. After leaving the water through the pressure relief valve 33, the further course corresponds to that previously described.
- the piston 34 is pressed down, the water below the piston is emptied via the pressure relief valve 33 and the drive shaft 21, which is mounted in the piston 34, is moved downwards and at the same time through the thread 40 into a Rotational movement set. So that cleaning already takes place during the downward movement, the drive shaft 21 is here secured against rotation and is designed telescopically.
- the basic principle of the invention is based in particular on the conical shape of the ceramic filter, as a result of which the cleaning brush 20 can be moved from an inactive, filtering position into an active, cleaning position by means of a short stroke.
- Another condition is of course that the filter is open at the bottom so that the dirt particles can be removed at the bottom. This also has the advantage that larger, somewhat heavier dirt particles do not remain in the filter area even during the filtering process.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94930327A EP0730486B1 (de) | 1993-11-22 | 1994-11-07 | Filtereinheit für fluide |
US08/648,164 US5714065A (en) | 1993-11-22 | 1994-11-07 | Filter unit for fluids |
AU79480/94A AU7948094A (en) | 1993-11-22 | 1994-11-07 | Filter unit for fluids |
JP7514934A JPH09505520A (ja) | 1993-11-22 | 1994-11-07 | 流体フィルタ装置 |
DE59407750T DE59407750D1 (de) | 1993-11-22 | 1994-11-07 | Filtereinheit für fluide |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH3490/93-9 | 1993-11-22 | ||
CH349093 | 1993-11-22 | ||
CH3775/93-3 | 1993-12-17 | ||
CH377593 | 1993-12-17 | ||
CH67394 | 1994-03-08 | ||
CH673/94-9 | 1994-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995014521A1 true WO1995014521A1 (de) | 1995-06-01 |
Family
ID=27172299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB1994/000344 WO1995014521A1 (de) | 1993-11-22 | 1994-11-07 | Filtereinheit für fluide |
Country Status (7)
Country | Link |
---|---|
US (1) | US5714065A (de) |
EP (1) | EP0730486B1 (de) |
JP (1) | JPH09505520A (de) |
AT (1) | ATE176172T1 (de) |
AU (1) | AU7948094A (de) |
DE (1) | DE59407750D1 (de) |
WO (1) | WO1995014521A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002249411A (ja) * | 2000-12-20 | 2002-09-06 | Adamis:Kk | 抗菌性部材及びその製造方法並びに抗菌性濾過器、抗菌性容器 |
WO2002056996A1 (en) * | 2001-01-18 | 2002-07-25 | Nicholas Jackson | Filter |
HK1050105A2 (en) * | 2002-04-04 | 2003-05-16 | Ying Tsui Jewellery & Goldsmit | A water purifier with filter cotton that is automatically cleaned |
US7022647B2 (en) | 2002-08-05 | 2006-04-04 | Battelle Energy Alliance, Llc | Methods of fabricating cermet materials and methods of utilizing same |
US6918941B2 (en) * | 2002-08-05 | 2005-07-19 | Battelle Energy Alliance, Llc | Cermet materials, self-cleaning cermet filters, apparatus and systems employing same |
US7468089B2 (en) * | 2002-11-04 | 2008-12-23 | Battelle Energy Alliance, Llc | Cermet materials |
GB0326629D0 (en) * | 2003-11-14 | 2003-12-17 | Evolution Aqua Ltd | A fluid filtration system and method of filtering fluid |
GB2433041A (en) * | 2005-12-08 | 2007-06-13 | Eminox Ltd | Cleaning a vehicle exhaust system filter |
US20070295667A1 (en) * | 2006-01-19 | 2007-12-27 | Ruprecht John C | Water filter apparatus and methodology |
ITTV20080040A1 (it) * | 2008-03-07 | 2009-09-08 | Dynatech S R L | Apparecchiatura e procedimento per il lavaggio automatico dei setti filtranti, a camera svuotata, con getti mobili di liquido a pressione, movimentati da pistone idraulico azionato dallo stesso liquido di lavaggio. |
KR101763916B1 (ko) * | 2016-01-27 | 2017-08-01 | 주식회사 에이런 | 막힘이 없는 금속필터 및 이 금속필터를 내장한 영구필터조립체 |
CN112312989B (zh) | 2018-04-25 | 2022-09-06 | 可克斯塔特国际股份有限公司 | 泵组件 |
SE543689C2 (en) * | 2019-10-04 | 2021-06-08 | Mimbly Ab | Improved filter assembly with self-cleaning |
CN112495293B (zh) * | 2020-11-21 | 2022-11-01 | 江西亿彩涂料有限公司 | 一种用于涂料加工的加料机构 |
CN112913639B (zh) * | 2021-01-22 | 2022-11-18 | 长江大学 | 一种虾稻共生绿色灌溉装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1993214A (en) * | 1932-11-21 | 1935-03-05 | Paul O Hass | Thickener for pulp stock or the like |
FR2237663A1 (en) * | 1973-07-19 | 1975-02-14 | Beaulieu Adrien | Strainer incorporating continuous cleaning mechanism - for removal of heavy particles and light debris from a fluid |
DE3027997A1 (de) * | 1980-07-24 | 1982-03-04 | Judo Wasseraufbereitung GmbH, 7150 Winnenden | Selbstreinigendes schutzfilter fuer wasserversorgungsanlagen |
DE3303912A1 (de) * | 1983-02-05 | 1984-08-09 | Didier-Werke Ag, 6200 Wiesbaden | Automatischer rueckspuelfilter |
EP0450170A2 (de) * | 1990-04-06 | 1991-10-09 | R. Späne Gmbh Chem. Techn Produkte | Brunnenregeneriergerät |
EP0460842A1 (de) * | 1990-06-06 | 1991-12-11 | Filtration Limited | Selbstreinigendes Filter |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US502690A (en) * | 1893-08-01 | Andre | ||
US1130725A (en) * | 1913-07-12 | 1915-03-09 | Frank E Getts | Liquid-strainer. |
US1382056A (en) * | 1917-11-21 | 1921-06-21 | Bontemps Antoine | Apparatus for the continuous separation of solids from liquids |
US1510863A (en) * | 1920-12-23 | 1924-10-07 | William H Rose | Filter |
US2678732A (en) * | 1949-06-08 | 1954-05-18 | Banks John | Fluid strainer |
US2606663A (en) * | 1950-05-24 | 1952-08-12 | Glenn R Blackman | Strainer for pipe lines and means for cleaning the same |
US4347134A (en) * | 1981-09-03 | 1982-08-31 | Svehaug Oswald C | Slurry separator having reaction nozzle driven rotory blades wiping a conical filter |
US5316685A (en) * | 1992-07-30 | 1994-05-31 | Grana, Inc. | Method and apparatus for separating solids from liquid containing same |
US5569383A (en) * | 1994-12-15 | 1996-10-29 | Delaware Capital Formation, Inc. | Filter with axially and rotatably movable wiper |
-
1994
- 1994-11-07 WO PCT/IB1994/000344 patent/WO1995014521A1/de active IP Right Grant
- 1994-11-07 US US08/648,164 patent/US5714065A/en not_active Expired - Fee Related
- 1994-11-07 EP EP94930327A patent/EP0730486B1/de not_active Expired - Lifetime
- 1994-11-07 DE DE59407750T patent/DE59407750D1/de not_active Expired - Fee Related
- 1994-11-07 AU AU79480/94A patent/AU7948094A/en not_active Abandoned
- 1994-11-07 JP JP7514934A patent/JPH09505520A/ja active Pending
- 1994-11-07 AT AT94930327T patent/ATE176172T1/de not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1993214A (en) * | 1932-11-21 | 1935-03-05 | Paul O Hass | Thickener for pulp stock or the like |
FR2237663A1 (en) * | 1973-07-19 | 1975-02-14 | Beaulieu Adrien | Strainer incorporating continuous cleaning mechanism - for removal of heavy particles and light debris from a fluid |
DE3027997A1 (de) * | 1980-07-24 | 1982-03-04 | Judo Wasseraufbereitung GmbH, 7150 Winnenden | Selbstreinigendes schutzfilter fuer wasserversorgungsanlagen |
DE3303912A1 (de) * | 1983-02-05 | 1984-08-09 | Didier-Werke Ag, 6200 Wiesbaden | Automatischer rueckspuelfilter |
EP0450170A2 (de) * | 1990-04-06 | 1991-10-09 | R. Späne Gmbh Chem. Techn Produkte | Brunnenregeneriergerät |
EP0460842A1 (de) * | 1990-06-06 | 1991-12-11 | Filtration Limited | Selbstreinigendes Filter |
Also Published As
Publication number | Publication date |
---|---|
EP0730486A1 (de) | 1996-09-11 |
US5714065A (en) | 1998-02-03 |
AU7948094A (en) | 1995-06-13 |
JPH09505520A (ja) | 1997-06-03 |
ATE176172T1 (de) | 1999-02-15 |
EP0730486B1 (de) | 1999-01-27 |
DE59407750D1 (de) | 1999-03-11 |
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