EP0339104A1 - Plumbing device - Google Patents

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Publication number
EP0339104A1
EP0339104A1 EP88106643A EP88106643A EP0339104A1 EP 0339104 A1 EP0339104 A1 EP 0339104A1 EP 88106643 A EP88106643 A EP 88106643A EP 88106643 A EP88106643 A EP 88106643A EP 0339104 A1 EP0339104 A1 EP 0339104A1
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EP
European Patent Office
Prior art keywords
housing
fitting according
check valves
valve
plunger
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.)
Granted
Application number
EP88106643A
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German (de)
French (fr)
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EP0339104B1 (en
Inventor
Rudolf Dipl.-Ing. Vollmer (Fh)
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Honeywell Braukmann GmbH
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Honeywell Braukmann GmbH
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8198916&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0339104(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Honeywell Braukmann GmbH filed Critical Honeywell Braukmann GmbH
Priority to EP88106643A priority Critical patent/EP0339104B1/en
Priority to DE8888106643T priority patent/DE3864681D1/en
Priority to AT88106643T priority patent/ATE66989T1/en
Priority to US07/339,280 priority patent/US4895180A/en
Publication of EP0339104A1 publication Critical patent/EP0339104A1/en
Application granted granted Critical
Publication of EP0339104B1 publication Critical patent/EP0339104B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/106—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using two or more check valves
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2579—Flow rate responsive
    • Y10T137/2587—Bypass or relief valve biased open
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2579—Flow rate responsive
    • Y10T137/2594—Choke
    • Y10T137/2597—Variable choke resistance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/3149—Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
    • Y10T137/3185—Air vent in liquid flow line
    • Y10T137/3294—Valved
    • Y10T137/3331—With co-acting valve in liquid flow path

Definitions

  • the present invention relates to a valve for preventing the backflow of water in a supply line according to the preamble of claim 1.
  • Such valves generally include two check valves in series with a vent valve therebetween.
  • Examples of such fittings are known in many ways and may e.g. DE-OS's 21 49 406, 24 24 978, 58 54 003 and 29 30 819 and US Pat. Nos. 2,389,412, 2 491 604, 2 503 424, 3 906 987, and 4,044,787 , Partly, these known fittings are designed so that an exchange of the valves can be made without the fitting must be removed from the lines. All of these valves have check valves which are arranged in the flow direction of the medium on a common axis. In addition, the known fittings are relatively complicated.
  • the fitting has a cross-shaped housing 10 with a water inlet nozzle 12 and a water outlet 14, which are aligned.
  • these nozzles 12, 14 are connected to an incoming and outgoing water pipe 18.
  • shut-off valves which are arranged in front of and behind the valve in the water pipe 18 and which are closed when maintenance work, e.g. An exchange of valves on the valve must be made.
  • the housing 10 passes above the inlet and outlet ports 12 and 14 in a cuboid housing part 20 to then take up a cup-shaped shape 22.
  • the valve stem 30 is connected via diaphragm plate 64 with a diaphragm 66 which is clamped between a flange collar 68 of the cup-shaped housing part 22 and a cover 70.
  • the connection between the cover and the housing is done by screws, not shown.
  • the valve stem 30 extends through the membrane 66 and through a further membrane 72 with a smaller diameter, which in a central recess 74 in the lid 70 with after inside jumping flange collar 76 is inserted.
  • the effective membrane diameter of the diaphragm 72 corresponds to the valve seat diameter of the valve seat 116.
  • the recess 74 has an internal thread 78 into which a threaded hood 80 is screwed in to clamp the diaphragm 72 between itself and the flange collar 76.
  • a spacer sleeve 82 and an abutment disc 84 provide a constant distance between the two diaphragms 66 and 72 and a screwed onto the end of the valve stem 30 nut 86 braces the whole assembly.
  • the threaded hood 80 is provided with a breathing opening 88.
  • the space 94 between the two membranes 66 and 72 is connected via a channel 90 to the water inlet nozzle 12. Further, a test port 92 is provided in the lid 70, at which the input pressure can be measured. Similarly, a channel 96 connects the water outlet 14 to a test port 98 in the lid 70, where the outlet pressure can be measured. Another unillustrated test port in the lid 70 allows the measurement of the pressure in a gap 100 between the rear of the check valve 34 and the front of the check valve 36. This space 100 is above recesses 102, 102 '(see Fig. 2) with an output intermediate chamber 104th connected by two partitions 106, 108 and a relief valve 110.
  • the relief valve 110 is seated in a drain port 112 which extends concentrically down to the valve lifter 30.
  • a drain port 112 In the drain port 112 is a Screwed valve seat body 114, the valve seat 116 cooperates with a arranged at the lower end of the valve stem 30 closing body 118. Finally, a drain funnel 120 is still screwed onto the drain port 112.
  • both check valves 34 and 36 are closed and the vent valve 110 is opened, so that a return flow from the outlet to the inlet is not possible and the intermediate chamber 100, 104 therebetween through the vent valve 110 is vented or dehydrated.

Abstract

A plumbing device for preventing water from flowing back into a supply pipe possesses a cross-shaped housing (10) constructed symmetrically with respect to the median axis. A diaphragm (66), which is pressurised by the inlet pressure, is clamped between the housing (10) and a cover (70) and acts on a relief valve (110) via a valve plunger (30). Two nonreturn valves (34, 36), which can be easily exchanged when the cover (70) is removed, are arranged parallel to the valve plunger (30), and on both sides thereof, in two bores (26, 28) of the housing (10). <IMAGE>

Description

Die vorliegende Erfindung bezieht sich auf eine Armatur zur Verhinderung des Rückfließens von Wasser in einer Versorgungsleitung nach dem Gattungsbegriff des Patentanspruches 1. Derartige Armaturen umfassen ganz allgemein zwei Rückschlagventile in Reihe mit einem Entlüftungsventil dazwischen. Beispiele für solche Armaturen sind in vielfältiger Weise bekannt und können z.B. den DE-OS'en 21 49 406, 24 24 978, 58 54 003 und 29 30 819 sowie den US-PS'en 2 389 412, 2 491 604, 2 503 424, 3 906 987, und 4 044 787 entnommen werden. Teilweise sind diese bekannten Armaturen so ausgebildet, daß ein Austausch der Ventile vorgenommen werden kann, ohne daß die Armatur aus der Leitungen entfernt werden muß. Alle diese Armaturen weisen Rückschlagventile auf, die in der Durchflußrichtung des Mediums auf einer gemeinsamen Achse angeordnet sind. Zudem sind die bekannten Armaturen relativ kompliziert aufgebaut.The present invention relates to a valve for preventing the backflow of water in a supply line according to the preamble of claim 1. Such valves generally include two check valves in series with a vent valve therebetween. Examples of such fittings are known in many ways and may e.g. DE-OS's 21 49 406, 24 24 978, 58 54 003 and 29 30 819 and US Pat. Nos. 2,389,412, 2 491 604, 2 503 424, 3 906 987, and 4,044,787 , Partly, these known fittings are designed so that an exchange of the valves can be made without the fitting must be removed from the lines. All of these valves have check valves which are arranged in the flow direction of the medium on a common axis. In addition, the known fittings are relatively complicated.

Es ist daher die Aufgabe der vorliegenden Erfindung, eine Armatur der eingangs genannten Art so auszubilden, daß sie bei äußerst kompaktem Aufbau einen leichen Austausch der Rückschlagventile ohne Entfernung der Armatur aus der Leitung ermöglicht. Die Lösung dieser Aufgabe gelingt gemäß den kennzeichnenden Merkmalen des Patentanspruches 1. Weitere vorteilhafte Ausgestaltungen der erfindungsgemäßen Armatur sind den Unteransprüchen entnehmbar.It is therefore the object of the present invention, a fitting of the type mentioned in such a way that it allows for a very compact structure a simple replacement of the check valves without removing the valve from the line. The solution of this task succeeds According to the characterizing features of claim 1. Further advantageous embodiments of the fitting according to the invention are the dependent claims.

Anhand eines in den Figuren der beiliegenden Zeichnung dargestellten Ausführungsbeispieles sei die Erfindung im folgenden näher erläutert. Es zeigen:

  • Fig. 1 einen Axialschnitt durch die erfindungsgemäße Armatur; und
  • Fig. 2 einen Schnitt nach Linie II-II in Fig. 1.
Reference to an embodiment illustrated in the figures of the accompanying drawings, the invention will be explained in more detail below. Show it:
  • 1 shows an axial section through the valve according to the invention. and
  • Fig. 2 is a section along line II-II in Fig. 1st

Gemäß Fig. 1 weist die Armatur ein kreuzförmiges Gehäuse 10 mit einem Wassereinlaßstutzen 12 und einem Wasserauslaßstutzen 14 auf, die miteinander fluchten. Mittels überwurfmuttern 16, 16′ können diese Stutzen 12, 14 an eine ankommende und abgehende Wasserleitung 18 angeschlossen werden. Nicht dargestellt sind Absperrventile, die vor und hinter der Armatur in der Wasserleitung 18 angeordnet sind und die geschlossen werden, wenn Wartungsarbeiten, z.B. ein Austausch der Ventile an der Armatur vorgenommen werden müssen.1, the fitting has a cross-shaped housing 10 with a water inlet nozzle 12 and a water outlet 14, which are aligned. By means of cap nuts 16, 16 ', these nozzles 12, 14 are connected to an incoming and outgoing water pipe 18. Not shown are shut-off valves which are arranged in front of and behind the valve in the water pipe 18 and which are closed when maintenance work, e.g. An exchange of valves on the valve must be made.

Das Gehäuse 10 geht oberhalb der Ein- und Auslaßstutzen 12 und 14 in einen quaderförmigen Gehäuseteil 20 über, um sodann nach oben eine topfförmige Gestalt 22 einzunehmen.The housing 10 passes above the inlet and outlet ports 12 and 14 in a cuboid housing part 20 to then take up a cup-shaped shape 22.

In den quaderförmigen Gehäuseteil 20 sind von oben eine zentrale Bohrung 24 und zu beiden Seiten dieser zentralen Bohrung 24 zwei weitere Bohrungen 26 und 28 angebracht. Die Bohrungen 24 - 28 sind alle im Durchmesser abgesetzt, um in der zentralen Bohrung 24 einen Ventilstößel 30 und eine ihn umgebende Rückstellfeder 32 anordnen zu können und in den beiden anderen Bohrungen 26 und 28 Rückschlagventile 34 und 36 anzuordnen. Die Rückstellfeder 32 stützt sich an dem in der Bohrung 24 gebildeten Absatz 38 ab und die Rückschlagventile 34 und 36 stützen sich mit Ventilsitzkörpern 40 und 42 ebenfalls an Bohrungsabsätzen 44 und 46 ab. Beide Ventilsitzkörper 40 und 42 werden durch in Nuten 48 und 50 eingreifende Federringe 52 und 54 in ihrer dargestellten Lage gehalten. Durch unterschiedlich starke Federn 56 und 58 vorgespannte Schließkörper 60 und 62 stützen sich an entsprechenden Ventilsitzen an den Ventilsitzkörpern 40 und 42 ab.In the cuboid housing part 20 from the top of a central bore 24 and on both sides of this central bore 24 two further holes 26 and 28 are mounted. The holes 24-28 are all offset in diameter to order in the central bore 24, a valve stem 30 and a surrounding return spring 32 and to arrange in the two other holes 26 and 28 check valves 34 and 36. The return spring 32 is supported on the shoulder 38 formed in the bore 24 and the check valves 34 and 36 are based with valve seat bodies 40 and 42 also on the bore paragraphs 44 and 46 from. Both valve seat body 40 and 42 are held by engaging in grooves 48 and 50 spring rings 52 and 54 in its illustrated position. By differently strong springs 56 and 58 biased closing body 60 and 62 are based on corresponding valve seats on the valve seat bodies 40 and 42 from.

Der Ventilstößel 30 ist über Membranteller 64 mit einer Membran 66 verbunden, die zwischen einem Flanschkragen 68 des topfförmigen Gehäuseteils 22 und einem Deckel 70 eingespannt ist. Die Verbindung zwischen Deckel und Gehäuse geschieht durch nicht dargestellte Schrauben. Der Ventilstößel 30 erstreckt sich durch die Membran 66 und durch eine weitere Membran 72 mit einem kleineren Durchmesser, die in einer zentralen Ausnehmung 74 im Deckel 70 mit nach innen springendem Flanschkragen 76 eingelegt ist. Der wirksame Membrandurchmesser der Membrane 72 entspricht dem Ventilsitzdurchmesser des Ventilsitzes 116. Die Ausnehmung 74 weist ein Innengewinde 78 auf, in das eine Gewindehaube 80 eingeschraubt ist, um die Membran 72 zwischen sich und dem Flanschkragen 76 einzuspannen. Eine Abstandshülse 82 und eine Widerlagerscheibe 84 geben einen konstanten Abstand zwischen beiden Membranen 66 und 72 vor und eine auf das Ende des Ventilstößels 30 aufgeschraubte Mutter 86 verspannt die ganze Anordnung. Die Gewindehaube 80 ist mit einer Atmungsöffnung 88 versehen.The valve stem 30 is connected via diaphragm plate 64 with a diaphragm 66 which is clamped between a flange collar 68 of the cup-shaped housing part 22 and a cover 70. The connection between the cover and the housing is done by screws, not shown. The valve stem 30 extends through the membrane 66 and through a further membrane 72 with a smaller diameter, which in a central recess 74 in the lid 70 with after inside jumping flange collar 76 is inserted. The effective membrane diameter of the diaphragm 72 corresponds to the valve seat diameter of the valve seat 116. The recess 74 has an internal thread 78 into which a threaded hood 80 is screwed in to clamp the diaphragm 72 between itself and the flange collar 76. A spacer sleeve 82 and an abutment disc 84 provide a constant distance between the two diaphragms 66 and 72 and a screwed onto the end of the valve stem 30 nut 86 braces the whole assembly. The threaded hood 80 is provided with a breathing opening 88.

Der Raum 94 zwischen den beiden Membranen 66 und 72 ist über einen Kanal 90 an den Wassereinlaßstutzen 12 angeschlossen. Ferner ist ein Prüfanschluß 92 im Deckel 70 vorgesehen, an dem der Eingangsdruck gemessen werden kann. In gleicher Weise verbindet ein Kanal 96 den Wasserauslaßstutzen 14 mit einem Prüfanschluß 98 im Deckel 70, an dem der Ausgangsdruck gemessen werden kann. Ein weiterer nicht dargestellter Prüfanschluß im Deckel 70 gestattet die Messung des Drucks in einem Zwischenraum 100 zwischen Hinterseite des Rückschlagventils 34 und Vorderseite des Rückschlagventils 36. Dieser Zwischenraum 100 steht über Ausnehmungen 102, 102′ (siehe Fig. 2) mit einer Ausgangs-Zwischenkammer 104 in Verbindung, die durch zwei Trennwände 106, 108 und ein Entlastungsventil 110 begrenzt wird. Das Entlastungsventil 110 sitzt in einem Ablaßstutzen 112, der sich konzentrisch zu dem Ventilstößel 30 nach unten erstreckt. In den Ablaßstutzen 112 ist ein Ventilsitzkörper 114 eingeschraubt, dessen Ventilsitz 116 mit einem an dem unteren Ende des Ventilstößels 30 angeordneten Schließkörper 118 zusammenwirkt. Schließlich ist auf den Ablaßstutzen 112 noch ein Ablaßtrichter 120 aufgeschraubt.The space 94 between the two membranes 66 and 72 is connected via a channel 90 to the water inlet nozzle 12. Further, a test port 92 is provided in the lid 70, at which the input pressure can be measured. Similarly, a channel 96 connects the water outlet 14 to a test port 98 in the lid 70, where the outlet pressure can be measured. Another unillustrated test port in the lid 70 allows the measurement of the pressure in a gap 100 between the rear of the check valve 34 and the front of the check valve 36. This space 100 is above recesses 102, 102 '(see Fig. 2) with an output intermediate chamber 104th connected by two partitions 106, 108 and a relief valve 110. The relief valve 110 is seated in a drain port 112 which extends concentrically down to the valve lifter 30. In the drain port 112 is a Screwed valve seat body 114, the valve seat 116 cooperates with a arranged at the lower end of the valve stem 30 closing body 118. Finally, a drain funnel 120 is still screwed onto the drain port 112.

Aus dem vorstehend beschriebenen Aufbau der Armatur ergibt sich folgende Wirkungsweise:
Bei statischen Druckverhältnissen, wenn der Wasserdruck am Einlaßstutzen 12 den Druck im Zwischenraum 100, 104 übersteigt und dieser Druck im Zwischenraum wiederum größer als der Druck im Auslaßstutzen 14 ist, sind beide Rückschlagventile 34 und 36 geschlossen. Ferner wird das Entlüftungsventil 110 durch den an der Membran 66 herrschenden Differenzdruck in der geschlossenen Stellung gehalten. Ein Wasserdurchfluß durch die Armatur findet nicht statt.From the structure of the valve described above results in the following mode of action:
In static pressure conditions, when the water pressure at the inlet port 12 exceeds the pressure in the intermediate space 100, 104 and this pressure in the intermediate space is in turn greater than the pressure in the outlet port 14, both check valves 34 and 36 are closed. Further, the vent valve 110 is held in the closed position by the differential pressure prevailing on the diaphragm 66. A water flow through the valve does not take place.

Findet Durchfluß statt, so steigt der Differenzdruck zwischen Einlaßstutzen 12 und Auslaßstutzen 14 an. Bei Durchfluß sind beide Rückschlagventile geöffnet und es fließt Wasser von dem Einlaßstutzen 12 zu dem Auslaßstutzen 14. Vorgegeben durch die Vorspannfedern 56 und 58 der Rückschlagventile 34 und 36 ergeben sich abgestufte Drücke vom Eingang über die Zwischenkammer zum Ausgang. Diese Druckverhältnisse sind so, daß das Entlüftungsventil 110 infolge des auf die Membran 66 einwirkenden Differenzdruckes geschlossen bleibt.If flow takes place, the differential pressure between inlet port 12 and outlet port 14 increases. At flow, both check valves are opened and water flows from the inlet port 12 to the outlet port 14. Provided by the biasing springs 56 and 58 of the check valves 34 and 36, there are stepped pressures from the inlet via the intermediate chamber to the outlet. These pressure conditions are such that the vent valve 110 remains closed due to the pressure acting on the diaphragm 66 differential pressure.

Unterschreitet der Differenzdruck zwichen Einlaßstutzen 12 und Zwischenkammer 14 einen vorbestimmten Wert, so sind beide Rückschlagventile 34 und 36 geschlossen und das Entlüftungsventil 110 wird geöffnet, so daß ein Rückfließen vom Ausgang zum Eingang nicht möglich ist und die dazwischen liegende Zwischenkammer 100, 104 durch das Entlüftungsventil 110 entlüftet bzw. entwässert wird.If the differential pressure between inlet port 12 and intermediate chamber 14 falls below a predetermined value, then both check valves 34 and 36 are closed and the vent valve 110 is opened, so that a return flow from the outlet to the inlet is not possible and the intermediate chamber 100, 104 therebetween through the vent valve 110 is vented or dehydrated.

Auch in dem Fall, wo ein oder beide Rückschlagventile nicht dicht schließen, kann bei einem Druckanstieg auf der Ausgangsseite oder einem Unterdruck auf der Eingangsseite kein Wasser in der Leitung zurückfließen, da sich das Entlüftungsventil 110 in der geöffneten Stellung befindet.Also, in the case where one or both of the check valves does not close tightly, when the pressure on the exit side or the negative pressure on the input side increases, no water can flow back in the line because the vent valve 110 is in the open position.

Claims (10)

1. Armatur zur Verhinderung des Rückfließens von Wasser in einer Versorgungsleitung mit einem Gehäuse, das einen Ein- und einen Auslaß sowie eine Entlüftungsöffnung aufweist, und in welchem in Durchströmrichtung hintereinander zwei Rückschlagventile angeordnet sind, und in welchem zwischen beiden Rückschlagventilen ein Entlüftungsventil angeordnet ist, mit einem das Gehäuse abschließenden Deckel, bei dessen Entfernung die Rückschlagventile zugänglich sind, wobei der Deckel zwischen sich und dem Gehäuse eine Membran einspannt, an der ein das Entlüftungsventil betätigender Stößel zentral aufgehängt ist und wobei der Raum über der Membran an den Druck vor dem ersten Rückschlagventil angeschlossen ist, dadurch gekenn­zeichnet, daß die beiden Rückschlagventile (34, 36) parallel zu dem Stößel (30) des Entlüftungsventils (110) angeordnet sind.1. fitting for preventing the backflow of water in a supply line having a housing having an inlet and an outlet and a vent, and in which two check valves are arranged one behind the other in the flow direction, and in which a vent valve is arranged between the two check valves, with a cover closing the housing, upon removal of which the check valves are accessible, the cover clamping between itself and the housing a diaphragm to which a vent valve actuating plunger is centrally suspended and wherein the space above the diaphragm is at the pressure upstream of the first Check valve is connected, characterized in that the two check valves (34, 36) are arranged parallel to the plunger (30) of the vent valve (110). 2. Armatur nach Anspruch 1, gekennzeichnet durch ein kreuzförmiges symmetrisch zur Mittellinie ausgebildetes Gehäuse (10).2. Fitting according to claim 1, characterized by a cross-shaped symmetrically to the center line formed housing (10). 3. Armatur nach Anspruch 2, dadurch gekenn­zeichnet, daß die beiden Rückschlagventile (34, 36) in Bohrungen (26, 28) angeordnet sind, die parallel zur Mittellinie verlaufen, den Stößel (30) zwischen sich einschließen und um 180° zueinander versetzt sind.3. Fitting according to claim 2, characterized in that the two check valves (34, 36) in bores (26, 28) are arranged, which extend parallel to the center line, the plunger (30) between them and are offset by 180 ° to each other , 4. Armatur nach einem der Ansprüche 1 bis 3, mit einer Einlaßkammer, einer Auslaßkammer und einer Zwischenkammer, die durch das Entlüftungsventil entlüftbar ist, dadurch gekenn­zeichnet, daß das Entlüftungsventil (110) in einem Ablaßstutzen (112) angeordnet ist, der konzentrisch zur Symmetrielinie des Gehäuses (10) verläuft.4. Fitting according to one of claims 1 to 3, with an inlet chamber, an outlet chamber and an intermediate chamber which can be vented through the vent valve, characterized in that the vent valve (110) in a drain port (112) is arranged, concentric with the line of symmetry of the housing (10). 5. Armatur nach Anspruch 4, dadurch gekenn­zeichnet, daß in den Ablaßstutzen (112) ein Ventilsitzkörper (114) eingeschraubt ist, der mit seinem Ventilsitz (116) mit einem an dem Stößel (30) angeordneten Schließkörper (118) zusammenwirkt.5. Fitting according to claim 4, characterized in that in the drain port (112) a valve seat body (114) is screwed, which cooperates with its valve seat (116) with a on the plunger (30) arranged closing body (118). 6. Armatur nach Anspruch 5, dadurch gekenn­zeichnet, daß das Gehäuse (10) zwei Trennwände (106, 108) aufweist, die den Einlaß (12) vom Auslaß (14) trennen und zwischen sich eine durch das Entlüftungsventil (110) entlüftbare Ausgangs-Zwischenkammer (104) bilden.6. Fitting according to claim 5, characterized in that the housing (10) has two partitions (106, 108) which separate the inlet (12) from the outlet (14) and between a through the vent valve (110) ventable output Form intermediate chamber (104). 7. Armatur nach Anspruch 6, dadurch gekenn­zeichnet, daß die sich zwischen beiden Rückschlagventilen (34, 36) und der Membran (66) befindliche Zwischenkammer (100) über mindestens eine Verbindungs-Ausnehmung (102, 102′) in dem Gehäuse (10) mit der Ausgangs-Zwischenkammer (104) verbunden ist.7. Fitting according to claim 6, characterized in that between the two check valves (34, 36) and the membrane (66) located intermediate chamber (100) via at least one connection recess (102, 102 ') in the housing (10). is connected to the output intermediate chamber (104). 8. Armatur nach Anspruch 7, dadurch ge­kennzeichnet, daß zwei Verbindungs-Ausnehmungen (102, 102′) angeordnet sind, die den Stößel (30) zwischen sich einschließen und um 180° zueinander versetzt sind.8. Fitting according to claim 7, characterized in that two connecting recesses (102, 102 ') are arranged, which enclose the plunger (30) between them and are offset by 180 ° to each other. 9. Armatur nach Anspruch 3, dadurch ge­kennzeichnet, daß die beiden Rückschlagventile (34, 36) als Einsteckrückflußverhinderer so gestaltet sind und daß sie nur in der jeweils richtigen Einbaulage montierbar sind.9. Fitting according to claim 3, characterized in that the two check valves (34, 36) are designed as Einsteckrückflußverhinderer and that they can only be mounted in the correct installation position. 10. Armatur nach einem der Ansprüche 1 bis 9, da­durch gekennzeichnet, daß der Stößel (30) an einer weiteren Membran (72) aufgehängt ist, deren wirksamer Membrandurchmesser dem Durchmesser des Ventilsitzes 116 entspricht.10. Fitting according to one of claims 1 to 9, characterized in that the plunger (30) is suspended on a further membrane (72) whose effective membrane diameter corresponds to the diameter of the valve seat 116.
EP88106643A 1988-04-26 1988-04-26 Plumbing device Expired - Lifetime EP0339104B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP88106643A EP0339104B1 (en) 1988-04-26 1988-04-26 Plumbing device
DE8888106643T DE3864681D1 (en) 1988-04-26 1988-04-26 FITTING.
AT88106643T ATE66989T1 (en) 1988-04-26 1988-04-26 FITTING.
US07/339,280 US4895180A (en) 1988-04-26 1989-04-17 Anti-backflow valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88106643A EP0339104B1 (en) 1988-04-26 1988-04-26 Plumbing device

Publications (2)

Publication Number Publication Date
EP0339104A1 true EP0339104A1 (en) 1989-11-02
EP0339104B1 EP0339104B1 (en) 1991-09-04

Family

ID=8198916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106643A Expired - Lifetime EP0339104B1 (en) 1988-04-26 1988-04-26 Plumbing device

Country Status (4)

Country Link
US (1) US4895180A (en)
EP (1) EP0339104B1 (en)
AT (1) ATE66989T1 (en)
DE (1) DE3864681D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0495372A1 (en) * 1991-01-12 1992-07-22 Friedrich Grohe Aktiengesellschaft Water tap
WO1993013273A1 (en) * 1991-12-23 1993-07-08 Grünbeck Wasseraufbereitung GmbH Pipe flow cut-off device
EP0573980A1 (en) * 1992-06-12 1993-12-15 BRANDONI S.p.A. Three-way cutoff unit particularly for sanitary distribution systems
EP0671514A2 (en) * 1993-11-02 1995-09-13 Kurt Michael Dipl.-Ing. Desch Combined bathtub supply and overflow fixture with shower diverter valve and integrated backflow preventer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204386C2 (en) * 1992-02-14 1994-01-20 Honeywell Braukmann Gmbh System separator
DE102004044832B3 (en) * 2004-09-14 2006-01-19 Alfred Kärcher Gmbh & Co. Kg Backflow preventer
US7293576B2 (en) * 2005-03-28 2007-11-13 Potter Electric Signal Company Single-piece manifold with reduced pressure arrangement
JP5189399B2 (en) * 2008-04-07 2013-04-24 国立大学法人信州大学 Check valve
JP5189403B2 (en) * 2008-05-08 2013-04-24 国立大学法人信州大学 Backflow prevention device

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US2389412A (en) 1941-09-26 1945-11-20 Carlton Frank Antibackflow and antisiphonage valve
US2491604A (en) 1943-06-22 1949-12-20 Carlton Frank Back siphonage prevention, antibackflow, and vacuum breaking valve
US2503424A (en) 1945-01-15 1950-04-11 Leonard L Snyder Backflow preventer
CH286217A (en) * 1950-07-19 1952-10-15 Benkiser Werk Kommandit Ges Flushing valve with valve body controlled by a counter pressure chamber.
US3837358A (en) * 1971-12-06 1974-09-24 Cla Val Co Backflow preventer valve assembly
US3906987A (en) 1974-03-13 1975-09-23 Watts Regulator Co Swing open cross-connection valve
US4044787A (en) 1976-03-19 1977-08-30 Rockwell International Corporation Backflow preventer and relief valve assembly
DE2854003A1 (en) 1978-03-28 1979-10-11 Amtrol Inc DEVICE FOR PREVENTING THE BACKFLOW OF WATER FROM A POINT OF USE INTO A WATER SUPPLY
US4207015A (en) 1978-02-23 1980-06-10 Atencio Francisco J G Self-stabilized hydromotive assembly
US4207915A (en) * 1977-09-06 1980-06-17 Amtrol, Inc. Back flow preventer
DE2930819A1 (en) 1979-07-30 1981-02-05 Amtrol Inc Prevention of used water return flow to supply duct - involves two detachable stop valve units and load relief valve, in housing
FR2489469A1 (en) * 1980-07-21 1982-03-05 Toro Co APPARATUS FOR PREVENTING THE FLOW OF A FLUID IN AN OPPOSITE NORMAL SENSE AND COMPRISING A SAFETY VALVE, PARTICULARLY FOR SUPPLYING WATER TO A LARGE CROP IRRIGATION SYSTEM
US4364408A (en) * 1979-02-09 1982-12-21 Griswold Controls Backflow prevention apparatus
FR2544832A1 (en) 1983-04-22 1984-10-26 Bayard Sa Ets Non-return device for a water supply network

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389412A (en) 1941-09-26 1945-11-20 Carlton Frank Antibackflow and antisiphonage valve
US2491604A (en) 1943-06-22 1949-12-20 Carlton Frank Back siphonage prevention, antibackflow, and vacuum breaking valve
US2503424A (en) 1945-01-15 1950-04-11 Leonard L Snyder Backflow preventer
CH286217A (en) * 1950-07-19 1952-10-15 Benkiser Werk Kommandit Ges Flushing valve with valve body controlled by a counter pressure chamber.
US3837358A (en) * 1971-12-06 1974-09-24 Cla Val Co Backflow preventer valve assembly
US3906987A (en) 1974-03-13 1975-09-23 Watts Regulator Co Swing open cross-connection valve
US4044787A (en) 1976-03-19 1977-08-30 Rockwell International Corporation Backflow preventer and relief valve assembly
US4207915A (en) * 1977-09-06 1980-06-17 Amtrol, Inc. Back flow preventer
US4207015A (en) 1978-02-23 1980-06-10 Atencio Francisco J G Self-stabilized hydromotive assembly
DE2854003A1 (en) 1978-03-28 1979-10-11 Amtrol Inc DEVICE FOR PREVENTING THE BACKFLOW OF WATER FROM A POINT OF USE INTO A WATER SUPPLY
US4364408A (en) * 1979-02-09 1982-12-21 Griswold Controls Backflow prevention apparatus
DE2930819A1 (en) 1979-07-30 1981-02-05 Amtrol Inc Prevention of used water return flow to supply duct - involves two detachable stop valve units and load relief valve, in housing
FR2489469A1 (en) * 1980-07-21 1982-03-05 Toro Co APPARATUS FOR PREVENTING THE FLOW OF A FLUID IN AN OPPOSITE NORMAL SENSE AND COMPRISING A SAFETY VALVE, PARTICULARLY FOR SUPPLYING WATER TO A LARGE CROP IRRIGATION SYSTEM
FR2544832A1 (en) 1983-04-22 1984-10-26 Bayard Sa Ets Non-return device for a water supply network

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0495372A1 (en) * 1991-01-12 1992-07-22 Friedrich Grohe Aktiengesellschaft Water tap
US5213268A (en) * 1991-01-12 1993-05-25 Friedrich Grohe Aktiengesellschaft Sprayer faucet with antibackflow protection
WO1993013273A1 (en) * 1991-12-23 1993-07-08 Grünbeck Wasseraufbereitung GmbH Pipe flow cut-off device
EP0573980A1 (en) * 1992-06-12 1993-12-15 BRANDONI S.p.A. Three-way cutoff unit particularly for sanitary distribution systems
EP0671514A2 (en) * 1993-11-02 1995-09-13 Kurt Michael Dipl.-Ing. Desch Combined bathtub supply and overflow fixture with shower diverter valve and integrated backflow preventer
EP0671514A3 (en) * 1993-11-02 1996-03-06 Desch Kurt Michael Combined bathtub supply and overflow fixture with shower diverter valve and integrated backflow preventer.

Also Published As

Publication number Publication date
ATE66989T1 (en) 1991-09-15
DE3864681D1 (en) 1991-10-10
US4895180A (en) 1990-01-23
EP0339104B1 (en) 1991-09-04

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