EP0550810A2 - Doppelmembranpumpe - Google Patents

Doppelmembranpumpe Download PDF

Info

Publication number
EP0550810A2
EP0550810A2 EP92118863A EP92118863A EP0550810A2 EP 0550810 A2 EP0550810 A2 EP 0550810A2 EP 92118863 A EP92118863 A EP 92118863A EP 92118863 A EP92118863 A EP 92118863A EP 0550810 A2 EP0550810 A2 EP 0550810A2
Authority
EP
European Patent Office
Prior art keywords
diaphragm pump
double diaphragm
pump according
product
groove
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP92118863A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0550810A3 (enrdf_load_stackoverflow
Inventor
Dirk Budde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Almatec Technische Innovationen GmbH
Original Assignee
Almatec Technische Innovationen GmbH
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 Almatec Technische Innovationen GmbH filed Critical Almatec Technische Innovationen GmbH
Publication of EP0550810A2 publication Critical patent/EP0550810A2/de
Publication of EP0550810A3 publication Critical patent/EP0550810A3/xx
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/129—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers
    • F04B9/131—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members
    • F04B9/135—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction

Definitions

  • the invention relates to a double diaphragm pump with two diaphragms, a control slide which is displaceable as a function of the diaphragm movement and an actuating element which is dependent on the diaphragm movement.
  • Such a double diaphragm pump is described in German Offenlegungsschrift 33 10 131.
  • the two diaphragms are connected to each other by a coupling rod and the pressure medium chambers are in the area between the diaphragms, while the product chambers are outside.
  • the actuating element is arranged parallel to the coupling rod and consists of an axially displaceable rod which protrudes from the control slide housing and is arranged coaxially in the control slide.
  • This rod acts in both directions via a compression spring on the control slide, which is held in its end positions by spring-loaded locking balls until the force of the spring arranged coaxially on the actuating rod exceeds the locking force.
  • the spool driven by spring force, then swings into the opposite control position and reverses the diaphragm movement. In this way, the control slide is moved back and forth between two stable end positions.
  • the membrane is also sealed by a simple annular bead, which is intended to ensure both a radial mounting and a seal. This is unsatisfactory, since the membrane is highly stressed in this area and the bead does not guarantee perfect retention and sealing in the long term when using a flowable membrane material such as PTFE.
  • the invention is therefore based on the object of creating a double diaphragm pump for conveying high-purity products which ensures the lowest possible amount of abrasion; it should also have the smallest possible surface in contact with the product and no sliding seal in the area of the flow and preferably also ensure improved retention and sealing of the membrane.
  • the solution is a double diaphragm pump with a central housing, two product chambers and two product chambers against coaxial Diaphragms sealing pressure medium chambers, outwardly guided piston rods and a preferably bow-shaped external connection between the piston rods of the diaphragms, preferably an outer cross member, and a control block for the mutual, controlled loading of the pressure medium chambers with the conveyed medium, which can be provided with a control slide actuated by the diaphragm movement.
  • the product chambers are located in the central housing, are sealed off from the outside by the diaphragm, and the diaphragms are acted upon alternately by pressure medium chambers which are sealed off from the product chambers.
  • the two membranes are mechanically connected to one another via the bow-shaped outer cross member, so that there is no longer any connection between the membranes which is passed through the central housing to the product chambers.
  • the product chambers are directly adjacent and only separated from one another by a wall of the central housing which resists the pressure difference between the product chambers and allows at least the suction and pressure channels to be accommodated.
  • a pressurized pulsation damper can be connected to the pressure side of the pressure valves, which can be equipped with a diaphragm of the same type as the double diaphragm pump. This results in only two parts of the housing that come into contact with the product, namely the central housing and the pulsation damper housing, which have no sharp edges or dead spaces in which particles could be deposited.
  • All parts that come into contact with the product can be made of solid PTFE-TFM, while all parts that do not come into contact with the product, such as the housing cover, control block, pulsation damper housing cover and end cover including the tie rod nuts, can be made of solid PVDF. Therefore, acidic or solvent-containing vapors cannot harm the outer parts, the entire double diaphragm pump is corrosion-resistant against all media that are used in the semiconductor industry.
  • the inner parts of the double diaphragm pump which are not in contact with the product, can consist of PETP, POM, PTFE-PPS, while highly stressed components such as tie rods and the bow-shaped outer crossmember can consist of EP resin 60 GF.
  • the membrane can have two opposite, radial directions on its outer circumference have staggered ring beads, one of which is designed as a groove bead with a clamping ring inserted into the groove. In this way, the surface in contact with the product can be made flat, flat and uniform and has no internal indentations in which particles could be deposited. There is also only one sealing surface to the central housing.
  • the groove bead advantageously has a larger one Radius than the ring bead and the groove is open axially in the direction of the ring bead.
  • a clamping ring is inserted into the groove, which preferably consists of an elastomer with a high Shore hardness, wherein the ring beads can preferably have a rectangular cross section.
  • the tension ring can have an axial height corresponding to the depth of the groove in the groove bead and the height of the ring bead, wherein the ring bead and the tension ring can be arranged side by side in the same ring groove of the housing.
  • the membrane is constantly pressed against the central housing by the clamping ring. Two of the three surfaces work radially; they are independent of the tension level of the tie rods, and one acts axially for the greatest possible safety. When the housing cover is removed, the membranes in the central housing remain firmly and sealingly and thus protect the product being conveyed.
  • the sealing is done with the tension ring inserted in the groove and the two large concentric ring surfaces of the membranes to the housing. These ring surfaces are always pressed constant by the clamping ring arranged between them regardless of the axial preload of the pump. Even an axial gap of up to one millimeter between the housing parts does not lead to leaks or tearing out of the membranes. The maintenance and monitoring of the axial preload is no longer necessary.
  • the double diaphragm pump has a central housing in which suction valves 2, pressure valves 3 and a suction connection 4 are arranged. Furthermore, coaxial product chambers 6 are arranged in the central housing 1 and are connected to the suction valves 2 and the pressure valves 3. Each product chamber 6 is closed by a membrane 7, which forms a pressure medium chamber 8 in relation to a housing 12 screwed to the central housing 1.
  • annular beads 9, 10 are arranged, which are offset radially to one another.
  • the annular bead 9 lies in a corresponding annular groove of the housing cover 12, while the annular bead 10 is arranged in a corresponding annular groove in the central housing 1 and has a circumferential open groove which is directed axially towards the annular bead 9 and into which a clamping ring 11 made of an elastomer with a high Shore Hardness is inserted.
  • the housing cover 12 are braced against the central housing 1 by means of tie rods 23 and nuts 24.
  • a piston rod 13 is screwed into the central central region of the membrane 7, which is guided in a guide 15 of the housing cover 12 by means of a bushing 14 and is sealed by means of a seal 16.
  • the coaxial piston rods 13 of the adjacent coaxial membranes 7 are positively connected to one another via a bow-shaped cross member 17 connected. In the position shown, the membrane 7 bears against the housing cover 12, so that the piston rod 13 with the outer cross member 17 is in the extreme right position.
  • the left diaphragm, not shown, is likewise moved to the right via the outer cross member 17 and practically fills the product chamber 6.
  • the pressure medium chamber 8 is pressurized with compressed air via the compressed air channel 22
  • the product located in the product chamber 6 is displaced and conveyed, while the left-hand product chamber, which is now enlarging, sucks in.
  • the oscillating pump movement of the membranes 7 is alternately controlled by means of a control slide 20 arranged in a control block 19.
  • This control slide 20 is controlled by the movement of the diaphragms 7 by means of an actuating rod 21, which is connected to the outer cross member 17 via an actuating pin 18.
  • the control block 19 with the control slide 20 can be designed as described in the German patent application P 41 06 180.2-15.
  • a pulsation damper housing 25 is screwed to the side of the central housing 1 and is sealed off from the pressure valves 3 by means of seals 26.
  • a pressure chamber 27 which is closed by a membrane 28.
  • This membrane 28 is designed like the membrane 7 and in the same way by annular beads 9, 10 between the pulsation damper housing 25 and a pulsation damper housing cover 30 clamped and sealed.
  • a compressed air connection 31 leads to the pressure medium chamber 29.
  • a piston rod 32 which is guided via seals 33 in the pulsation damper housing cover 30, serves to guide the diaphragm 28 when it moves to compensate for the fluctuations in the delivery rate under the action of the compressed air supplied via the connection 31.
  • the pulsation damper housing cover 30 and the pulsation damper housing 25 are connected to the central housing 1 via tie rods 36 by means of sealed cap nuts 37.
  • End covers 38 are placed over the bow-shaped outer cross member 17, and the control block 19 is supplied with compressed air as the conveying medium via a compressed air connection 34.
  • the double diaphragm pump according to the invention can be designed to be completely metal-free, so that the formation of metal ions is reliably avoided and thus a risk to microcomponents in the electrical industry is excluded.
  • the components in contact with the product are made of solid PTFE-TFM, while all the outer, non-product-contacting parts, such as the housing cover 12, control block 19, pulsation damper housing cover 30, end cover 38 solid PVDF are made.
  • the inner parts that are not in contact with the product are made of PETP, POM or PTFE-PPS, while all highly stressed components such as tie rods 23, 36, piston rods 13, 32 and the outer cross member 17 are made of EP resin GF.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP92118863A 1991-11-08 1992-11-04 Doppelmembranpumpe Withdrawn EP0550810A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4136805A DE4136805A1 (de) 1991-11-08 1991-11-08 Doppelmembranpumpe
DE4136805 1991-11-08

Publications (2)

Publication Number Publication Date
EP0550810A2 true EP0550810A2 (de) 1993-07-14
EP0550810A3 EP0550810A3 (enrdf_load_stackoverflow) 1994-03-23

Family

ID=6444374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92118863A Withdrawn EP0550810A2 (de) 1991-11-08 1992-11-04 Doppelmembranpumpe

Country Status (4)

Country Link
US (1) US5261798A (enrdf_load_stackoverflow)
EP (1) EP0550810A2 (enrdf_load_stackoverflow)
JP (1) JPH05240161A (enrdf_load_stackoverflow)
DE (1) DE4136805A1 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150085791A (ko) * 2014-01-16 2015-07-24 잉 린 카이 압축 다이아프램 펌프에 대한 진동-저감 방법
CN105090006A (zh) * 2014-05-20 2015-11-25 蔡应麟 五增压腔隔膜泵的减震构造
CN105090007A (zh) * 2014-05-20 2015-11-25 蔡应麟 四增压腔隔膜泵的减震构造
CN105089988A (zh) * 2014-05-20 2015-11-25 蔡应麟 四增压腔隔膜泵的减震构造与摆轮结构改良
KR20230031679A (ko) * 2021-08-27 2023-03-07 주식회사 이노디스 벨로우즈 펌프

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5699934A (en) * 1996-01-29 1997-12-23 Universal Instruments Corporation Dispenser and method for dispensing viscous fluids
DE19638722C1 (de) * 1996-09-21 1998-04-16 Almatec Maschinenbau Gmbh Doppelmembranpumpe
DE19738779C2 (de) * 1997-09-04 2003-06-12 Almatec Maschb Gmbh Umsteuersystem für eine druckgetriebene Membranpumpe
FR2768190B1 (fr) * 1997-09-10 1999-10-08 Peugeot Dispositif de transmission de pression et/ou de volume pour une pompe
US5957153A (en) * 1998-09-18 1999-09-28 Frey Turbodynamics, Ltd. Oscillating dual bladder balanced pressure proportioning pump system
US6695593B1 (en) 1998-10-05 2004-02-24 Trebor International, Inc. Fiber optics systems for high purity pump diagnostics
US6106246A (en) 1998-10-05 2000-08-22 Trebor International, Inc. Free-diaphragm pump
US6957952B1 (en) 1998-10-05 2005-10-25 Trebor International, Inc. Fiber optic system for detecting pump cycles
DE19915773A1 (de) * 1999-04-08 2000-10-12 Laing Oliver Hydraulisch bewegtes Dreiwegeventil
DE10044868A1 (de) * 2000-09-12 2002-04-04 Almatec Maschb Gmbh System zum Kreislauffördern von Medien
JP3542990B2 (ja) * 2001-12-05 2004-07-14 株式会社ヤマダコーポレーション ダイヤフラムポンプ装置
JP3749717B2 (ja) * 2003-04-03 2006-03-01 株式会社ヤマダコーポレーション 往復動式流体移送ポンプ
US7134849B1 (en) 2003-04-22 2006-11-14 Trebor International, Inc. Molded disposable pneumatic pump
US8197231B2 (en) 2005-07-13 2012-06-12 Purity Solutions Llc Diaphragm pump and related methods
US20070134112A1 (en) * 2005-12-14 2007-06-14 Hupp Evan L Button diaphragm piston pump
DE102007005019A1 (de) * 2006-05-18 2007-12-06 Continental Teves Ag & Co. Ohg Membranpumpe
US8017409B2 (en) 2009-05-29 2011-09-13 Ecolab Usa Inc. Microflow analytical system
US8932031B2 (en) 2010-11-03 2015-01-13 Xylem Ip Holdings Llc Modular diaphragm pumping system
US9273686B2 (en) * 2012-01-31 2016-03-01 Schlumberger Technology Corporation Pre-charging pump chamber by preemptively opening a valve
US9610392B2 (en) 2012-06-08 2017-04-04 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
DE102014222743A1 (de) * 2014-11-06 2016-05-12 Continental Automotive Gmbh Pumpeneinheit für Reduktionsmittel einer Abgasreinigungsanlage
CN107246376A (zh) * 2017-07-12 2017-10-13 浙江卡韦德新能源科技有限公司 柴油发动机尾气处理尿素泵的膜片总成
US20190323625A1 (en) 2018-04-23 2019-10-24 Rain Bird Corporation Valve With Reinforcement Ports And Manually Removable Scrubber
DE102020209594B3 (de) * 2020-07-30 2021-12-30 Festo Se & Co. Kg Fluidgerät
US11746771B2 (en) * 2021-04-16 2023-09-05 Teryair Equipment Pvt. Ltd. Actuator valve of an air operated double diaphragm pump

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2711134A (en) * 1950-07-26 1955-06-21 Infilco Inc Chemical feeder
US2667129A (en) * 1952-06-19 1954-01-26 Dorr Co Twin diaphragm pump with stressrelieved diaphragms
DE1017914B (de) * 1955-09-03 1957-10-17 Franz Schoettke Membran fuer Foerderpumpen
US2850981A (en) * 1956-03-08 1958-09-09 Tobin Arp Mfg Company Hydraulic pump
FR1418442A (fr) * 1964-11-30 1965-11-19 Annovi & Reverberi Dispositif destiné à éviter la rupture de la membrane dans les pompes à circuit oléodynamique avec piston à étanchéité pour liquides de tous genres
US3276389A (en) * 1965-08-06 1966-10-04 Panther Pump & Equipment Co In Balanced pressure pump
DE1503390C3 (de) * 1965-12-31 1975-08-07 Robert Bosch Gmbh, 7000 Stuttgart Membranpumpe
US3461808A (en) * 1967-07-03 1969-08-19 Wood John Co Diaphragm hand pumps
JPS5669444A (en) * 1979-11-12 1981-06-10 Mikuni Kogyo Co Ltd Accelerating pump
GB2079858A (en) * 1980-07-09 1982-01-27 Patay Pumps Ltd Diaphragm pump
JPS5857566A (ja) * 1981-10-02 1983-04-05 Asahi Organic Chem Ind Co Ltd バタフライバルブ
DE3310131A1 (de) * 1983-03-21 1984-09-27 DEPA Gesellschaft für Verfahrenstechnik mbH, 4000 Düsseldorf Umsteuerventileinsatz fuer eine druckluftgetriebene doppelmembranpumpe
JPS59185884A (ja) * 1983-04-07 1984-10-22 Yamada Yuki Seizo Kk ダイアフラムポンプ
JPS60501585A (ja) * 1983-05-06 1985-09-19 ミリコム・インコ−ポレイテツド メツセ−ジメモリを有するメツセ−ジ通信システム
NZ205100A (en) * 1983-08-01 1987-04-30 Flynn L W & Co Ltd Diaphram pump with diaphram having central portion off-set axially from periphery
GB2162591B (en) * 1984-08-02 1988-05-25 Shoketsu Kinzoku Kogyo Kk Fluid pressure booster
JPS61160666A (ja) * 1984-12-29 1986-07-21 Nippon Valqua Ind Ltd ダイアフラムおよびその製造方法
JPS61202685U (enrdf_load_stackoverflow) * 1985-06-07 1986-12-19
JPS624967A (ja) * 1985-06-28 1987-01-10 Hino Motors Ltd 薄膜成形ダイアフラムおよびエア・シリンダ
DE8525733U1 (de) * 1985-09-10 1987-01-15 Becker, Erich, 7812 Bad Krozingen Membranpumpe
JPS62131988A (ja) * 1985-12-04 1987-06-15 Nippon Valqua Ind Ltd ダイアフラムポンプ
JPH0139920Y2 (enrdf_load_stackoverflow) * 1986-04-04 1989-11-30
US4836756A (en) * 1986-08-28 1989-06-06 Nippon Pillar Packing Co., Ltd. Pneumatic pumping device
DE8702941U1 (de) * 1987-02-26 1987-05-07 DEPA Gesellschaft für Verfahrenstechnik mbH, 4000 Düsseldorf Doppelmembranpumpe
JP2518842B2 (ja) * 1987-04-30 1996-07-31 富士通株式会社 高温薬液移送用圧縮空気駆動二連ダイヤフラムポンプ
US4854832A (en) * 1987-08-17 1989-08-08 The Aro Corporation Mechanical shift, pneumatic assist pilot valve for diaphragm pump
JP2544399B2 (ja) * 1987-09-22 1996-10-16 山田油機製造 株式会社 ダイアフラムポンプの圧力チャンバ―
FR2624922B1 (fr) * 1987-12-17 1990-04-27 Milton Roy Dosapro Dispositif de detection de rupture d'une membrane de pompe a membrane
DE3824780A1 (de) * 1988-07-21 1990-01-25 Lechler Elring Dichtungswerke Kolben, insbesondere tauchkolben fuer kompressoren
US4887516A (en) * 1988-09-13 1989-12-19 American Standard Inc. Clamping arrangement for diaphragm piston assembly
DE4003101A1 (de) * 1990-02-02 1991-08-08 Karl Eickmann Hochdruck aggregat
JPH04101078A (ja) * 1990-08-17 1992-04-02 Matsushita Electric Ind Co Ltd 密閉型圧縮機

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150085791A (ko) * 2014-01-16 2015-07-24 잉 린 카이 압축 다이아프램 펌프에 대한 진동-저감 방법
CN105090006A (zh) * 2014-05-20 2015-11-25 蔡应麟 五增压腔隔膜泵的减震构造
CN105090007A (zh) * 2014-05-20 2015-11-25 蔡应麟 四增压腔隔膜泵的减震构造
CN105089988A (zh) * 2014-05-20 2015-11-25 蔡应麟 四增压腔隔膜泵的减震构造与摆轮结构改良
KR20150133635A (ko) * 2014-05-20 2015-11-30 잉 린 카이 4개-압축-챔버 다이아프램 펌프에 대한 진동-저감 구조
CN105089988B (zh) * 2014-05-20 2018-11-16 蔡应麟 四增压腔隔膜泵的减震构造与摆轮结构的组合
KR20230031679A (ko) * 2021-08-27 2023-03-07 주식회사 이노디스 벨로우즈 펌프
KR102537942B1 (ko) 2021-08-27 2023-05-31 주식회사 이노디스 벨로우즈 펌프

Also Published As

Publication number Publication date
US5261798A (en) 1993-11-16
EP0550810A3 (enrdf_load_stackoverflow) 1994-03-23
JPH05240161A (ja) 1993-09-17
DE4136805C2 (enrdf_load_stackoverflow) 1993-08-12
DE4136805A1 (de) 1993-05-13

Similar Documents

Publication Publication Date Title
EP0550810A2 (de) Doppelmembranpumpe
DE2511964C2 (de) Hydraulischer Druckbegrenzer mit einem elastisch beaufschlagten Verschlußorgan
EP2475889B1 (de) Drehkolbenpumpe
DE69512979T2 (de) Flüssigkeitspumpe
EP3484628B1 (de) Spender für flüssige bis pastöse massen
WO2011045318A1 (de) Druckhalteventil
WO2016173798A1 (de) Pumpenvorrichtung
EP0946245B1 (de) Verschnapptes mittelrohr
WO2020182921A9 (de) Ventilanordnungen für eine membranpumpe
DE2844142C2 (de) Durchfluß-Steuerventil
DE2339891C2 (de) Filtereinrichtung, insbesondere für Hauswasseranlagen
EP3441612B1 (de) Pumpen-einheit, damit ausgestattete lagervorrichtung sowie verfahren zum betreiben der lagervorrichtung
DE3208657C2 (de) Berührungslose Dichtanordnung für die Endflächen einer Rotationsmaschine
EP0565972A1 (de) Klebstoffauftragventil
DE3031067A1 (de) Dosierpumpe fuer zwei komponenten
DE1802976A1 (de) Pneumatischer Pulsator
DE3731864A1 (de) Pharmamodul
DE4143371C2 (de) Membran für eine Membranpumpe
DE102018113616A1 (de) Peristaltikpumpe
EP0280070A2 (de) Doppelmembranpumpe
DE2640440A1 (de) Dosier-kolbenpumpe
DE1528710B2 (de) Kreiselpumpe
EP0790544A1 (de) Vorrichtung zum Regeln eines Volumenstromes
DE19638722C1 (de) Doppelmembranpumpe
EP0626518A1 (de) Membran für eine Pumpe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DK ES FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DK ES FR GB IT LI NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19940628