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EP1793176B1 - Disjoncteur hydraulique avec étanchéité renforcée - Google Patents

Disjoncteur hydraulique avec étanchéité renforcée Download PDF

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Publication number
EP1793176B1
EP1793176B1 EP20060120358 EP06120358A EP1793176B1 EP 1793176 B1 EP1793176 B1 EP 1793176B1 EP 20060120358 EP20060120358 EP 20060120358 EP 06120358 A EP06120358 A EP 06120358A EP 1793176 B1 EP1793176 B1 EP 1793176B1
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EP
European Patent Office
Prior art keywords
valve body
pressure
release valve
downstream
upstream
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.)
Active
Application number
EP20060120358
Other languages
German (de)
English (en)
Other versions
EP1793176A2 (fr
EP1793176A3 (fr
Inventor
Willi Hecking
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.)
Hans Sasserath GmbH and Co KG
Original Assignee
Hans Sasserath GmbH and Co KG
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 Hans Sasserath GmbH and Co KG filed Critical Hans Sasserath GmbH and Co KG
Priority to PL06120358T priority Critical patent/PL1793176T3/pl
Publication of EP1793176A2 publication Critical patent/EP1793176A2/fr
Publication of EP1793176A3 publication Critical patent/EP1793176A3/fr
Application granted granted Critical
Publication of EP1793176B1 publication Critical patent/EP1793176B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1083—Filling valves or arrangements for filling
    • 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
    • Y10T137/2605—Pressure responsive
    • Y10T137/2617—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
    • Y10T137/3149—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
    • 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
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural
    • Y10T137/7841—One valve carries head and seat for second valve

Definitions

  • the invention relates to a system separator for physically separating an upstream liquid system from a downstream liquid system by means of a drain valve depending on the pressure drop between upstream and downstream liquid system, with an upstream backflow preventer, a downstream backflow preventer and a piston designed as a discharge valve body, which is arranged between the fluid flow between the backflow preventer wherein upstream of the upstream backflow preventer an inlet pressure of the upstream liquid system, between the drain valve body and the downstream backflow preventer a mean pressure in a medium pressure space and downstream of the downstream backflow preventer an outlet pressure of the downstream liquid system, and wherein on the drain valve body the pressure difference between inlet pressure and mean pressure Counteracts the closing direction of a force acting in the opening direction on the discharge valve body loading spring, wherein the discharge valve body on the downstream side has an effective for the medium pressure pressure surface, which is smaller than the effective pressure for the input pressure surface, whereby a cavity is formed by the Ablouventil stresses, and the cavity communicates with the medium-pressure space.
  • the upstream fluid system may be a drinking water system.
  • the downstream fluid system may e.g. to be a heating system. It is essential to prevent contaminated water from the heating system from flowing back into the drinking water system when the heating system is being refilled or refilled, for example by the pressure in the drinking water system collapsing for some reason. There are so-called.
  • Backflow preventer These are spring-loaded valves which allow fluid flow in only one direction, namely from the upstream to the downstream system. However, such backflow preventers can become leaky. Therefore, e.g. For drinking water and heating water, a separation of the liquid systems alone by backflow preventer not allowed. There must be a physical separation of the fluid systems so that in case of failure between the systems a connection to a drain and to the atmosphere is made.
  • System or pipe dividers include an upstream backflow preventer connected to the upstream liquid system and a downstream backflow preventer connected to the downstream system. Between the backflow preventers is disposed a pressure controlled dump valve which establishes a passage from the upstream liquid system to the downstream liquid system when there is a sufficient pressure differential between the two liquid systems so that the liquid can safely flow only from the upstream to the downstream liquid system. If this pressure drop does not exist, the drain valve establishes a connection of the space between the backflow preventers with the atmosphere and a drain.
  • the drain valve is a displaceable in a fitting housing piston.
  • This piston has a central passage and at its downstream end face an annular valve seat, which comes to a valve-tight ring seal axially to the plant.
  • the passage then establishes an atmosphere-closed connection between the upstream and downstream fluid systems.
  • the upstream backflow preventer sits in the passage.
  • the piston of the drain valve is first pressed against the action of the spring acting thereon in its operating position by the input pressure in the drinking water system, in which he the connection to Atmosphere and interrupts the process and establishes a connection between drinking water system and heating system. Then, the upstream and downstream backflow preventers are pressed. It streams drinking water to the heating system and fill it up or down. The heating system is then filled to an outlet pressure that is below the inlet pressure. In normal operation, the difference between inlet pressure and outlet pressure is determined by the pressure drop across the backflow preventers, that is, by the strength of the return valve springs.
  • the intermediate pressure is in accordance with the pressure drop across the upstream backflow preventer and the pressure drop across the upstream backflow preventer.
  • the pressure difference between the inlet pressure and the mean pressure must be greater than a limit determined by the loading spring of the valve body of the drain valve.
  • a seat seal is arranged in the valve seat of the drain valve. This is acted on the one hand by the medium pressure. On the other hand, with the drain valve closed, the force of the drain valve body acts on the seal. If this force is not large enough, there is a risk of insufficient gasket.
  • the force of the discharge valve body acting on the seal corresponds to the force exerted by the upstream liquid system minus the force exerted on the discharge valve body in the medium pressure space and the constant spring force of the spring acting on the discharge valve.
  • the effective areas of the discharge valve are changed with unchanged pressure conditions in the inlet and in the medium-pressure space, the respective forces also change.
  • the seat diameter of the valve seat of the drain valve so a greater sealing force can be achieved.
  • the force acting in the closing direction force is so high at high pressures that the valve does not open.
  • a system separator in which a stepped piston is guided as a drain valve body in a two-part housing.
  • the stepped piston forms with a seat edge and an annular valve seat a drain valve.
  • the valve seat has a smaller diameter than the input-side outer diameter of the stepped piston.
  • the formed between the piston outer side and the housing, hollow annular space is limited on the side of the medium-pressure space with a housing-fixed, clamped between the input-side and output-side housing, annular housing partition.
  • the hollow annulus is hydraulically connected to the medium-pressure chamber.
  • the loading spring acting on the bleed valve body is disposed around the outside of the stepped piston.
  • the housing partition wall forms the spring abutment. This arrangement is complex and bulky.
  • EP 0088 861 A2 discloses a pipe separator for drinking water pipes with two coaxially arranged non-return valves in the form of valves and a arranged between the backflow preventer leakage water pipe with a drain pipe perpendicular to the pipe axis.
  • the leak water nozzle is closed by a spring-loaded, coaxially displaceable in the tube piston tube.
  • the object is achieved in that a movable in the direction of movement of the Ablassventil stresses sliding seat is provided in the cavity, which is opposite the Ablassventiligen movable up to a housing fixed stop, which is arranged in the flow direction in front of the valve seat of the drain valve.
  • the drain valve As the inlet pressure increases, the drain valve is first closed. Subsequently, the backflow preventer opens. Then prevails in the medium pressure chamber compared to the prevailing atmospheric pressure increased pressure. Via the connection between the cavity and the medium-pressure space, an increased pressure is built up in the cavity. This pressure acts on the movable sliding seat. The sliding seat is moved in the direction of the valve seat to the stop fixed to the housing. Conversely, the pressure in the cavity between the sliding seat, the housing and the drain valve body also acts "from the back" on the protruding part of the drain valve body. The effective area for the medium pressure is not reduced in this way despite smaller valve seat. Thus, the balance of forces on the drain valve body remains the same with reduced valve seat size. However, the sealing force is greater because the seal has a smaller area. Accordingly, the contact pressure and the quality of the seal increases.
  • the outlet-side diameter of the discharge valve body is smaller than the inlet-side diameter
  • the sliding seat is formed by an annular sleeve, which is movably guided in the cavity formed by the difference in diameter between the drain valve body and housing.
  • the discharge valve body thus forms between the inlet-side, thicker end and the outlet-side end a cavity between the housing and piston. In this cavity, the sleeve can move.
  • the housing-fixed stop can be formed by an annular step inside the housing. At medium pressure in the cavity, the sleeve is pressed against the stop. The housing then absorbs part of the pressure. In this way, a particularly compact arrangement is achieved.
  • the annular sleeve has an L-shaped cross-section, one leg of which comes to rest with the inside when exposed to medium pressure on the stop.
  • a channel may be provided for connecting the interior of the discharge valve body with the cavity, which is formed in the region between the housing, the drain valve body and the sliding seat.
  • This channel can be made, for example, by a simple bore or annulus with lands.
  • the channel of the cavity may initially extend radially inwardly and then in the axial direction downstream of the medium-pressure space.
  • a first seal is provided, which is arranged in an annular groove on the outside in the drain valve body in the region of larger diameter and a second seal, which is arranged in the cavity between the channel and the movable sliding seat.
  • the backflow preventer, the drain valve body, the loading spring, the housing and the sliding seat are arranged coaxially.
  • Fig.1 is designated 10 a tubular fitting housing.
  • the fitting housing 10 has an inlet 12 and an outlet 14 at the opposite end.
  • a cylindrical chamber 16 is formed in the fitting housing 10.
  • a piston-shaped valve body 18 is guided in the chamber 16.
  • Ablas 20 From the chamber 16 is a Ablas 20, which has a connected to the atmosphere outlet pipe 22.
  • valve body 18 is sealingly guided in the cylindrical chamber 16 on its lateral surface 24 with a seal 26. At its downstream end face 28, the valve body 18 forms an annular valve seat 30.
  • the valve seat 30 is located in the in Fig.1 shown, downstream end position on a seat seal 32 at. With the lateral surface 30 of the valve body 18 covers the drain 20. This is a drain valve 34th
  • the valve body 18 has a central passage 36. On the valve body 18, an inwardly projecting, annular disk-shaped edge 38 is formed at the upstream end. In the passage 36 sits an upstream backflow preventer 40. In the housing 42 of the backflow preventer sits a valve seat 44. The valve seat 44 cooperates with a valve closing body 46.
  • the valve closing body 46 has a head 48 and a shaft 50.
  • the shaft 50 is in an opening 61 of the Housing 42 out.
  • the shaft 50 is surrounded by a coil spring 52.
  • the coil spring 52 is guided with one end 54 in an annular groove 56 in the housing 42 and abuts the head 48 with the other end 58.
  • a coil spring 60 is supported on a shoulder 62 on the inside of the fitting housing 10 and abuts upstream on the downstream, rear side of the valve body 18. As a result, the valve body 18 of the discharge valve is loaded by the spring 60. The spring 60 ensures that the drain valve is always open without further forces.
  • a backflow preventer 64 is seated in the fitting housing.
  • the backflow preventer 64 is basically similar in structure to the upstream backflow preventer 40 and therefore not described in detail. Both backflow preventers 40 and 64 open only in the direction from the inlet pressure to the outlet pressure. Between the valve body 18 and the downstream backflow preventer 64, a medium-pressure space 66 is formed.
  • the coil spring 52 of the backflow preventer 40 is stronger than the coil spring 60 acting on the valve body 18. Therefore, the backflow preventer 40 opens only when the valve body 18 is moved to its downstream end position by the pressure difference between inlet pressure and the mean pressure prevailing in the medium-pressure space. In this way, when the passage to the outlet port with respect to the outlet 14 and the atmosphere is completed, the backflow preventer is pressed by the water pressure.
  • the heating system is filled to an outlet pressure slightly below the inlet pressure.
  • Fig.2 the drain valve body 18 is shown in detail with the drain valve open.
  • the upstream backflow preventer 40 is closed.
  • the spring 60 is relaxed. In this state, the drain valve body is in a stopper position at a distance from the seat seal 32.
  • FIG 3 shows the situation in which the inlet pressure in the inlet of the valve body increases. Then, the drain valve body 18 moves against the spring force of the spring 60 to the right in Figure 3 , In this case, the valve body 30 abuts against the seat seal 32 in its end position. With the lateral surface 30 of the valve body 18 covers the drain 20. There is no water drain.
  • the drain valve body 18 has a diameter on the input side that is in Fig.2 denoted by "D". The diameter corresponds to the inner diameter of the tubular fitting housing 10.
  • the drain valve body 18 further forms an annular step 70, so that the downstream side has a smaller diameter. This smaller diameter is in Fig.2 denoted by "d”.
  • the inlet pressure thus acts on a surface which is determined by the diameter D.
  • an annular cavity 74 is formed between the discharge valve body and the inside of the fitting housing 10.
  • a sliding seat 76 is guided.
  • the sliding seat 76 has an L-shaped cross-section with legs 78 and 80.
  • the sliding seat 76 is movably guided in the axial direction.
  • a sealing ring 82 is provided in the cavity 74. Via a channel 82, the cavity 74 is hydraulically connected to the medium-pressure chamber.
  • a seal 88 is provided between the step 70 and the slide seat 76.
  • the medium pressure prevailing in the medium-pressure chamber 66 is also present in the cavity 74.
  • the mean pressure corresponds to the atmospheric pressure.
  • the bleed valve 34 is closed, the medium pressure increases with increasing inlet pressure. This situation is in Figure 3 shown.
  • the sliding seat 76 moves to the right in the illustration.
  • FIG 4 the situation is shown at high inlet pressure with open backflow preventer.
  • the drain valve body 18 is against the spring force of the spring 60 in its right stop position.
  • the drain valve is closed.
  • the backflow preventer is opened.
  • the medium pressure is also in the cavity 74. Due to this medium pressure, the sliding seat 76 is brought to the leg 78 against an annular shoulder in the valve body to stop.
  • the pressure in the cavity 74 is also exerted on the rear, protruding part of the pressure surface of the valve body 18. This ensures that the effective area for the medium pressure is the same as for the inlet pressure. As a result, the forces on the valve body 18 remain independent of the inlet pressure.
  • valve seat seal 32 has a reduced diameter. Since the forces on the valve body remain unchanged under unchanged pressure conditions, the contact pressure on the seat seal 32 but larger. This increases the sealing force.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)

Claims (8)

  1. Séparateur de système pour la séparation physique d'un système de liquide amont par rapport à un système de liquide aval au moyen d'une vanne de décharge (34) en fonction de la différence de pression entre le système de liquide amont et le système de liquide aval, muni d'un clapet antiretour amont (40), d'un clapet antiretour aval (64) et d'un corps de vanne de décharge (18) configuré sous forme de piston et disposé à l'intérieur du courant entre les clapets antiretour (40, 64), une pression d'admission du système de liquide amont régnant en amont du clapet antiretour amont (40), une moyenne pression régnant dans un espace de moyenne pression (66) entre le corps de vanne de décharge (18) et le clapet antiretour aval (64) et une pression de sortie du système de liquide aval régnant en aval du clapet antiretour aval (64), et, au niveau du corps de vanne de décharge (18), la différence de pression régnant dans le sens de fermeture entre la pression d'admission et la moyenne pression réagissant à un ressort de charge (60) agissant, dans le sens d'ouverture, sur le corps de vanne de décharge, le corps de vanne de décharge (18) présentant du côté aval une surface réduite (d) plus petite que la surface de pression effective pour la pression d'admission, ceci permettant au corps de vanne de décharge de former un espace creux (74) connecté à l'espace de moyenne pression (66),
    caractérisé en ce que
    il est prévu dans l'espace creux (74) un siège coulissant (76) pouvant se déplacer dans le sens de déplacement du corps de vanne de décharge ainsi que par rapport au corps de vanne de décharge (18) jusqu'à une butée (84) fixe par rapport au boîtier et disposée, dans le sens du courant, devant le siège de vanne (32) de la vanne de décharge (34).
  2. Séparateur de système selon la revendication 1, caractérisé en ce que le diamètre du corps de vanne de décharge (18), situé côté sortie, est inférieur au diamètre situé côté admission et le siège coulissant (76) est formé par une douille annulaire guidée de manière à pouvoir se déplacer, entre le corps de vanne de décharge (18) et le boîtier (10), dans l'espace creux qui se forme suite à la différence de diamètre.
  3. Séparateur de système selon la revendication 2, caractérisé en ce que la butée (84) fixe par rapport au boîtier est formée par un seuil annulaire situé à l'intérieur du boîtier.
  4. Séparateur de système selon la revendication 3, caractérisé en ce que la douille annulaire (76) présente une section transversale en forme de L dont l'un des côtés (84) vient s'appuyer avec la face intérieure contre la butée (84) lorsque la pression moyenne est appliquée.
  5. Séparateur de système selon l'une quelconque des revendications précédentes, caractérisé par un canal (82) destiné à relier l'intérieur du corps de vanne de décharge à l'espace creux (74) formé dans la zone située entre le boîtier (10), le corps de vanne de décharge (18) et le siège coulissant (76).
  6. Séparateur de système selon la revendication 5, caractérisé en ce que le canal (82) part de l'espace creux, d'abord, radialement vers l'intérieur et, ensuite, dans le sens axial en aval vers l'espace de moyenne pression (66).
  7. Séparateur de système selon la revendication 5 ou 6, caractérisé par une première garniture d'étanchéité (26) disposée dans une rainure annulaire à l'extérieur du corps de vanne de décharge (18) dans la zone du diamètre le plus important et par une seconde garniture d'étanchéité (88) disposée dans l'espace creux entre le canal et le siège coulissant pouvant se déplacer.
  8. Séparateur de système selon l'une quelconque des revendications précédentes, caractérisé en ce que les clapets antiretour (40, 64), le corps de vanne de décharge (18), le ressort de charge (60), le boîtier (10) et le siège coulissant (76) sont disposés coaxialement.
EP20060120358 2005-10-11 2006-09-08 Disjoncteur hydraulique avec étanchéité renforcée Active EP1793176B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06120358T PL1793176T3 (pl) 2005-10-11 2006-09-08 Izolator przepływu zwrotnego o wzmocnionej sile uszczelniającej

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510049110 DE102005049110B4 (de) 2005-10-11 2005-10-11 Dichtkraftverstärkter Rohrtrenner

Publications (3)

Publication Number Publication Date
EP1793176A2 EP1793176A2 (fr) 2007-06-06
EP1793176A3 EP1793176A3 (fr) 2008-12-24
EP1793176B1 true EP1793176B1 (fr) 2012-12-19

Family

ID=37698305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060120358 Active EP1793176B1 (fr) 2005-10-11 2006-09-08 Disjoncteur hydraulique avec étanchéité renforcée

Country Status (7)

Country Link
US (1) US7575016B2 (fr)
EP (1) EP1793176B1 (fr)
AU (1) AU2006222658B2 (fr)
DE (1) DE102005049110B4 (fr)
ES (1) ES2400579T3 (fr)
PL (1) PL1793176T3 (fr)
ZA (1) ZA200608089B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005215B3 (de) * 2007-01-29 2008-06-19 Hans Sasserath & Co Kg Systemtrenner
DE102008023921A1 (de) 2007-05-16 2009-02-12 Desch, Kurt Michael, Dipl.-Ing. (FH) Absicherung gegen Rücksaugen von Badewannenwasser und Bodenzufluß mit Niveautrennung des zulaufenden Mischwassers und des ablaufenden Wannenwassers
DE102008023894A1 (de) 2007-09-25 2009-04-02 Desch, Kurt Michael, Dipl.-Ing. (FH) Badewannen-Bodenzufluss mit Niveautrennung des zulaufenden Mischwassers und des ablaufenden Wannenwassers, gegen Rücksaugen abgesichert mit einer externen, handelsüblichen Sicherungseinrichtung, die mindestens 150 mm über dem oberen Wannenrand ist
US9504214B1 (en) * 2014-10-06 2016-11-29 Bryan L. Towsley Anti-siphon valve with freeze protection
PL3803170T3 (pl) * 2018-05-30 2022-10-17 Giacomini S.P.A. Urządzenie zapobiegające przepływowi wstecznemu ze strefą obniżonego ciśnienia
CN109268334A (zh) * 2018-11-20 2019-01-25 台州巨力工具有限公司 一种用于液压工具的单向阀及液压工具

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013088A (en) * 1975-05-19 1977-03-22 Braukmann Armaturen Ag Valve structure
US4284097A (en) * 1978-03-28 1981-08-18 Amtrol Inc. In line back flow preventer
DE8207222U1 (de) 1982-03-15 1982-08-05 Lang Apparatebau GmbH, 8227 Siegsdorf Rohrtrenner, insbesondere fuer trinkwasserleitungen
US5228470A (en) * 1992-01-22 1993-07-20 A. W. Cash Valve Manufacturing Corporation Self draining hose connection dual check valve back flow preventer
DE19854951C2 (de) * 1998-11-27 2001-11-15 Rudolf Vollmer Systemtrenner
DE19902574C1 (de) * 1999-01-22 2000-10-05 Rudolf Vollmer Systemtrenner
DE10214747A1 (de) * 2002-04-03 2003-10-16 Sasserath & Co Kg H Ventilanordnung für einen Rohrtrenner
PL359448A1 (en) * 2002-04-03 2003-10-06 Hans Sasserath & Co Kg Set of isolating valves for water supply system
DE20305410U1 (de) * 2003-04-03 2003-07-10 Grünbeck Wasseraufbereitung GmbH, 89420 Höchstädt Systemtrenner
DE202005008021U1 (de) * 2005-05-21 2005-07-21 Vollmer, Rudolf Systemtrenner

Also Published As

Publication number Publication date
ES2400579T3 (es) 2013-04-10
AU2006222658B2 (en) 2011-03-17
AU2006222658A1 (en) 2007-04-26
DE102005049110A1 (de) 2007-04-19
PL1793176T3 (pl) 2013-04-30
DE102005049110B4 (de) 2007-05-31
US20070079873A1 (en) 2007-04-12
US7575016B2 (en) 2009-08-18
EP1793176A2 (fr) 2007-06-06
ZA200608089B (en) 2007-12-27
EP1793176A3 (fr) 2008-12-24

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