EP0035147A1 - Gas pressure regulator - Google Patents

Gas pressure regulator Download PDF

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Publication number
EP0035147A1
EP0035147A1 EP81101003A EP81101003A EP0035147A1 EP 0035147 A1 EP0035147 A1 EP 0035147A1 EP 81101003 A EP81101003 A EP 81101003A EP 81101003 A EP81101003 A EP 81101003A EP 0035147 A1 EP0035147 A1 EP 0035147A1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
gas pressure
chamber
membrane
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
EP81101003A
Other languages
German (de)
French (fr)
Other versions
EP0035147B1 (en
Inventor
Hans Meier
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.)
Vaillant BV
Original Assignee
Vaillant Austria GmbH
Cofrabel Nv
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
SCHONEWELLE BV
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 Vaillant Austria GmbH, Cofrabel Nv, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd, SCHONEWELLE BV filed Critical Vaillant Austria GmbH
Priority to AT81101003T priority Critical patent/ATE8700T1/en
Publication of EP0035147A1 publication Critical patent/EP0035147A1/en
Application granted granted Critical
Publication of EP0035147B1 publication Critical patent/EP0035147B1/en
Expired legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/18Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/188Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using mechanical means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N1/00Regulating fuel supply
    • F23N1/08Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/087Regulating fuel supply conjointly with another medium, e.g. boiler water using mechanical means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00Valves, nozzles or pumps
    • F23N2235/12Fuel valves
    • F23N2235/14Fuel valves electromagnetically operated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00Valves, nozzles or pumps
    • F23N2235/12Fuel valves
    • F23N2235/18Groups of two or more valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00Valves, nozzles or pumps
    • F23N2235/12Fuel valves
    • F23N2235/20Membrane valves

Definitions

  • the present patent application relates to a gas pressure regulator for a circulating water heater with a water heater according to the preamble of the main claim corresponding to the main claim of an older patent application.
  • control diaphragm When registering with the main application, it is provided that the control diaphragm is preloaded by a spring that can be adjusted by means of a screw; consequently, the maximum pressure at the outlet chamber of the gas pressure regulator can be specified by adjusting the screw.
  • the flow switch detects the flow of water in the tap water path and automatically switches over.
  • a circulating water heater 1 is connected to a flow line 2, which leads to a consumer 3, from which in turn a return line 4 leads to the circulating water heater.
  • the consumer 3 here consists of a plurality of radiators connected in parallel and / or in series, which are regularly equipped with thermostatic valves (not shown) at their inlet.
  • the flow line 2 starts from a three-way switch valve 5, one outlet of which is connected to the flow line 2 and the other outlet to the water heater feed line 6, which leads to a water heater 7, of which a water heater return line 8 goes off, which merges at a union point 9 with the return line 4 provided with a pump to lead to a heat exchanger 11 charged with combustion gases from a burner 10, to which a line 12 connects, which leads to the three-way switch valve 5 .
  • the burner 10 is a gas burner which is connected to a gas pressure regulator 14 via a gas line 13.
  • An actuating rod 15, which starts from a membrane switch 16 leads to the gas pressure regulator 14, from this membrane switch a further actuating rod 17 leads, which leads to the three-way switch valve 5.
  • the membrane switch 16 is over a pressure Carrier line 18 connected to a flow meter 19 which lies in the course of a tap line 20 for tap water, which leads via a coil 21 inside the water heater 7 and is controlled at its end by a tap valve 22.
  • This gas pressure regulator has a housing 30 which has an inlet chamber 31 and an outlet chamber 32 in the course of the gas line 13. Between the inlet and outlet chamber there is a valve seat 33 which can be closed in the idle state by a valve body 35 which is articulated by a rod 34 and which is under the restoring force of a compression spring 36, the actuating rod 34 being connected to a diaphragm plate 37 of a regulating diaphragm 38, which is clamped pressure-tight in the housing 30 at its edge in the region of the outlet chamber 32.
  • the inlet and outlet chamber are thus separated from one another in the idle state via the closed valve 33, 35.
  • the membrane divides a further chamber 39, from which a channel 40 leads to a valve center space 41.
  • the valve center space 41 is delimited by two valve seats 42 and 43 and an outflow opening 44.
  • a channel 45 leads from the valve seat 43 to a branching point 46, from which a further channel 47 leads to the outlet chamber 32.
  • Another channel 48 leads to a membrane chamber 49, which is connected to the outflow opening 44 via a line 50, in which a valve seat 51 is provided.
  • the valve Seat 51 corresponds to a valve body 52 which is movable and controlled in the open position by a compression spring 53 which is supported relative to the housing 30.
  • the valve body 52 is attached to a membrane 54 which is under the action of a compression spring 55 which is adjustable by an adjusting screw 56 which in turn is gastight in a thread in the housing 30.
  • a further diaphragm chamber 57 is formed, which is connected to a further diaphragm chamber 59 via an opening 58.
  • this membrane chamber 59 is delimited by a membrane 60, which forms a further membrane chamber 61 on the side facing away from the membrane chamber 59, in which a compression spring 62 is supported, which is supported with respect to a spring plate 63.
  • the spring plate 63 is rigidly connected to the actuating rod 15, the actuating rod carries a stop piece 64 which is elastically supported against the housing 30 via a compression spring 65.
  • the stop piece 64 carries an adjusting screw 66 acting as a stop, the tip of which can move against the upper side of the housing 30 with a maximum travel, the maximum travel away from the housing 30 limits the tip of a further adjustment screw 67, which is screwed into an extension 68 of the housing 30 .
  • the actuating rod 15 passes through the wall of the water scarf ter 16 and is connected to a membrane plate 69 which is supported by a membrane 70.
  • Membrane chambers 71 and 72 are formed on both sides of the membrane.
  • device 18 are connected to the flow meter 19.
  • the flow meter 19 is known as a venturi and is located in the tap water path 20.
  • the membrane chamber 61 is connected to the atmosphere via a throttle bore 73.
  • a valve body 74 is connected to the membrane 60, which corresponds to a valve seat 75 arranged in the housing 30.
  • the valve seat 75 is connected to the membrane chamber 59 via a line 76.
  • the valve body 74 is under the action of a compression spring 77, which is supported with respect to the housing 30 and tends to lift the valve body 74 from its valve seat 75.
  • the valve seat 75 is adjoined by a chamber 78, which is connected to the membrane chamber 59 via a bore 79 of relatively small cross-section and to the atmosphere via a supply air bore 80 and an air filter 81.
  • the chamber 78 Via a suction line 82, the chamber 78 is connected to the suction port of a diaphragm pump 83 which is driven by a motor (not shown) via a shaft 84.
  • the motor in turn, can be supplied with voltage or electrical power by an actuator in order to ensure a certain drive behavior of the motor.
  • the diaphragm pump has a pressure line 85 which is connected to the diaphragm chamber 59 via a throttle bore 86.
  • Gas passes from the inlet chamber 31 via a throttle bore 87 into an operator space 88 which is delimited by the valve seat 42.
  • An electromagnet 89 is provided in the interior of the operator room and can be supplied with electrical power via an electrical feed line 90.
  • An armature 91 cooperates with the electromagnet 89, which is extended as a two-armed lever 92 and is rotatably mounted in the housing 30 at 93. The armature or the lever is under the action of a tension spring 94 which is attached to the housing 30 at one end.
  • a rod 96 is articulated via a pivot point 95, which rod is connected to a valve body 97 which corresponds to the valve seats 42 and 43.
  • the gas pressure regulator according to FIG. 2 just described has the following function: starting from the idle state shown in the drawing, the valve seat 33 is closed by the valve body 35 under the expansion effect of the compression spring 36, that is to say the connection between the gas inlet and gas outlet is interrupted.
  • the diaphragm pump 83 is at rest, the pressure and suction lines 85 and 82 have no differential pressure with respect to one another. Valves 97, 42 and 52, 51 and 74, 75 are closed.
  • the electromagnet 89 is without current.
  • the gas supply to the burner 10 is interrupted.
  • the electromagnet 89 is excited via the line 90, whereupon this causes its armature 91 attracts and moves the valve body 97 from the seat 42 to the seat 43 and closes this valve seat against the action of the return spring 94.
  • the channel 47 and thus the gas outlet from the chamber 39 is separated in terms of pressure.
  • pressure from the gas inlet via the inlet chamber 31 and the throttle bore 87 now builds up in the operator space 88 with a delay.
  • the valve center space communicates with the chamber 39 via the channel 40, so that a pressure slowly builds up in this chamber, which leads to the valve body 35 lifting off from its valve seat 33 against the restoring force of the compression spring 36.
  • the pressure in the chamber 39 is limited by the fact that a back pressure, caused by the back-up effect of the burner nozzles, builds up in the burner in the outlet chamber 32.
  • the back pressure acts on the diaphragm chamber 49 via the lines 47 and 48 and strives to move the diaphragm 54 against the restoring force of the spring 55 when it rises above a certain value.
  • the pressure threshold at which this movement occurs can be set using the adjusting screw 56.
  • a movement of the membrane 54 against the adjusting screw 56 results in the valve body 52 being lifted off the valve seat 51, this movement being supported by compression spring 53.
  • the characteristic of the compression spring 53 is, however, much weaker than that of the compression spring 55.
  • the pressure in the valve center space 41 is also limited.
  • the pressure threshold just set is used to ensure a gas pressure in the outlet chamber 32, which is necessary for proper ignition in the area of the connected grate burner. If the pressure in the outlet chamber 32 is too low, the gas flames in the grate burner will only burn partially, and too high a pressure will result in a deflagration in the fireplace.
  • the shaft 84 of the diaphragm pump 83 is acted on, so that the diaphragm pump 83 begins to deliver.
  • a pressure builds up in the membrane chamber 59, which pressure is also present in the membrane chamber 57 via the opening 58.
  • the pressure present here is limited by an actuating movement of the diaphragm 60. If the pressure in the diaphragm chamber 59 rises to a value which causes the diaphragm 60 to retract against the restoring force of the spring 62, the valve body 74 lifts from its seat 75 with the assistance of the action of the spring 77. This limits the pressure in the membrane chamber 59.
  • the level of the pressure in the membrane chamber 59 is thus proportional to the respective nominal pressure of the gaseous fuel in the burner.
  • water from the cold water network 20 begins to flow via the flow switch 19 into the coil 21 of the water heater 7.
  • the flow switch 19 registers the process water flow rate and communicates it to the membrane switch 16 as a pressure fluctuation via the measuring line 18.
  • the actuating rod 15 extends from the water switch 16 and compresses the compression spring 62. Compression is limited when the stop 66 moves against the top of the housing 30. The.
  • the motor of the diaphragm pump can be controlled.
  • the action on the diaphragm pump 83 is interrupted.
  • This means that the diaphragm chamber 57 is depressurized, since the pressure difference between the suction and pressure ports of the diaphragm pump is reduced via the throttle bore 79.

Abstract

1. A gas pressure regulator for a circulating water heater provided with a heater for water for consumption, including a valve seat (33), which is disposed in a housing (30) and controlled by a springresettable valve member (35), which is connected to a positioning diaphragm (38), which is subjected to the gas pressure behind the valve (33/35) in the outlet chamber (32), also comprising a first control diaphragm (54), which is subjected on one side to the gas pressure behind the valve (33/35), and a fluid pump (83), wherein that side of the first control diaphragm (54) which is remote from the gas is subjected only to the pressure of the fluid pump (83) and that pressure is limited by a valve (75/76), which is coupled to a second control diaphragm (60), which is biased by a spring (62), characterized in that a backing member (63) for the spring (62) of the second control diaphragm (60) is connected to a positioning rod (15) of a flow switch (16), which is associated with a tap water path (20, 21, 22) of the heater (7) for water for consumption.

Description

Die vorliegende Patentanmeldung bezieht sich auf einen Gasdruckregler für einen Umlaufwasserheizer mit einem Gebrauchswasserbereiter gemäß dem Oberbegriff des Hauptanspruchs entsprechend dem Hauptanspruch einer älteren Patentanmeldung.The present patent application relates to a gas pressure regulator for a circulating water heater with a water heater according to the preamble of the main claim corresponding to the main claim of an older patent application.

Es ist bei der Hauptanmeldung vorgesehen, die Regelmembran von einer durch eine Schraube einstellbaren Feder vorzubelasten, mithin kann durch die Einstellung der Schraube der Maximaldruck an der Auslaßkammer des Gasdruckreglers vorgegeben werden.When registering with the main application, it is provided that the control diaphragm is preloaded by a spring that can be adjusted by means of a screw; consequently, the maximum pressure at the outlet chamber of the gas pressure regulator can be specified by adjusting the screw.

Um den Gasdruckregler nach der älteren Anmeldung in Weiterentwicklung für einen Umlaufwasserheizer mit einem Gebrauchswasserbereiter verwenden zu können und um ferner unterschiedliche Maximaldruckwerte für Heizungs- und Brauchwasserbetrieb durch unterschiedliche Beaufschlagung der Regelmembran vorgeben zu können, wird, ausgehend von der älteren Anmeldung, eine Maßnahme gemäß dem kennzeichnenden Teil des Hauptanspruchs vorgeschlagen.To the gas pressure regulator after the older registration in further development for a circulation water heater with one use To be able to use water heaters and also to be able to specify different maximum pressure values for heating and process water operation by applying different pressure to the control membrane, a measure according to the characterizing part of the main claim is proposed, starting from the earlier application.

Hierdurch wird eine automatische Maximaldruckwertumschaltung erreicht, je nachdem ob der Umlaufwasserheizer gerade für Heizungsbetrieb oder für Brauchwasserbereitung eingesetzt wird. Der Strömungsschalter stellt das Fließen von Wasser im Zapfwasserweg fest und bewirkt automatisch die Umschaltung.As a result, an automatic maximum pressure value changeover is achieved, depending on whether the circulating water heater is currently used for heating operation or for hot water preparation. The flow switch detects the flow of water in the tap water path and automatically switches over.

Weitere Ausgestaltungen und besonders vorteilhafte Weiterbildungen der Erfindung gehen aus den Unteransprüchen sowie der nachfolgenden Beschreibung hervor, die anhand der Figuren eins und zwei der Zeichnung ein Ausführungsbeispiel der Erfindung näher erläutert.Further refinements and particularly advantageous developments of the invention emerge from the subclaims and the following description which explains an exemplary embodiment of the invention in more detail with reference to FIGS. One and two of the drawing.

Es zeigen

  • Figur eins eine schematische Darstellung der Schaltung eines Umlaufwasserheizers mit Gebrauchswasserbereitung und
  • Figur zwei den erfindungsgemäßen Gasdruckregler als schematische Detaildarstellung.
Show it
  • Figure one is a schematic representation of the circuit of a circulation water heater with process water preparation and
  • Figure two shows the gas pressure regulator according to the invention as a schematic detailed representation.

In beiden Figuren bedeuten gleiche Bezugszeichen jeweils die gleichen Einzelheiten.In both figures, the same reference numerals denote the same details.

Gemäß Figur eins ist ein Umlaufwasserheizer 1 an eine Vorlaufleitung 2 angeschlossen, die zu einem Verbraucher 3 führt, von dem wiederum eine Rücklaufleitung 4 zum Umlaufwasserheizer führt. Der Verbraucher 3 besteht hier aus einer Vielzahl parallel und/oder in Serie geschalteter Radiatoren, die regelmäßig mit nicht dargestellten Thermostatventilen an ihrem Einlaß bestückt sind.According to FIG. 1, a circulating water heater 1 is connected to a flow line 2, which leads to a consumer 3, from which in turn a return line 4 leads to the circulating water heater. The consumer 3 here consists of a plurality of radiators connected in parallel and / or in series, which are regularly equipped with thermostatic valves (not shown) at their inlet.

Die Vorlaufleitung 2 geht von einem Drei-Wege-Umschaltventil 5 ab, dessen einer Auslaß mit der Vorlaufleitung 2 und dessen anderer Auslaß mit der Gebrauchswasserbereiter-Vorlaufleitung 6 verbunden ist, die zu einem Gebrauchswasser-Wärmetauscher 7 führt, von dem eine Gebrauchswasserbereiter-Rücklaufleitung 8 abgeht, die sich an einer Vereinigungsstelle 9 mit der mit einer Pumpe versehenen Rücklaufleitung 4 vereinigt, um zu einem von Verbrennungsgasen eines Brenners 10 beaufschlagten Wärmetauscher 11 zu führen, an den sich eine Leitung 12 anschließt, die zu dem Drei-Wege-Umschaltventil 5 führt. Bei dem Brenner 10 handelt es sich um einen Gasbrenner, der über eine Gasleitung 13 mit einem Gasdruckregler 14 verbunden ist. Zum Gasdruckregler 14 führt eine Stellstange 15, die von einem Membranschalter 16 ausgeht, von diesem Membranschalter geht eine weitere Stellstange 17 ab, die zu dem Drei-Wege-Umschaltventil 5 führt. Der Membranschalter 16 ist über eine Druckübertragungsleitung 18 mit einem Strömungsmesser 19 verbunden, der im Zuge einer Zapfleitung 20 für Zapfwasser liegt, die über eine Rohrschlange 21 im Inneren des Gebrauchswasserbereiters 7 führt und an ihrem Ende von einem Zapfventil 22 beherrscht ist.The flow line 2 starts from a three-way switch valve 5, one outlet of which is connected to the flow line 2 and the other outlet to the water heater feed line 6, which leads to a water heater 7, of which a water heater return line 8 goes off, which merges at a union point 9 with the return line 4 provided with a pump to lead to a heat exchanger 11 charged with combustion gases from a burner 10, to which a line 12 connects, which leads to the three-way switch valve 5 . The burner 10 is a gas burner which is connected to a gas pressure regulator 14 via a gas line 13. An actuating rod 15, which starts from a membrane switch 16, leads to the gas pressure regulator 14, from this membrane switch a further actuating rod 17 leads, which leads to the three-way switch valve 5. The membrane switch 16 is over a pressure Carrier line 18 connected to a flow meter 19 which lies in the course of a tap line 20 for tap water, which leads via a coil 21 inside the water heater 7 and is controlled at its end by a tap valve 22.

Aus der Figur zwei geht der Gasdruckregler im einzelnen hervor: Dieser Gasdruckregler weist ein Gehäuse 30 auf, das im Zuge der Gasleitung 13 eine Einlaßkammer 31 und eine Auslaßkammer 32 aufweist. Zwischen Ein- und Auslaßkammer befindet sich ein Ventilsitz 33, der von einem von einer Stange 34 angelenkten Ventilkörper 35, der unter der Rückstellkraft einer Druckfeder 36 steht, im Ruhezustand verschließbar ist, wobei die Stellstange 34 mit einem Membranteller 37 einer Regelmembrane 38 verbunden ist, die im Bereich der Auslaßkammer 32 an ihrem Rand druckdicht im Gehäuse 30 eingespannt ist. Ein- und Auslaßkammer sind somit im Ruhezustand über das verschlossene Ventil 33, 35 voneinander getrennt. Die Membran teilt eine weitere Kammer 39 ab, von der ein Kanal 40 zu einem Ventilmittelraum 41 führt. Der Ventilmittelraum 41 ist über 2 Ventilsitze 42 und 43 sowie eine Abströmöffnnung 44 begrenzt.The gas pressure regulator is shown in detail in FIG. Two: This gas pressure regulator has a housing 30 which has an inlet chamber 31 and an outlet chamber 32 in the course of the gas line 13. Between the inlet and outlet chamber there is a valve seat 33 which can be closed in the idle state by a valve body 35 which is articulated by a rod 34 and which is under the restoring force of a compression spring 36, the actuating rod 34 being connected to a diaphragm plate 37 of a regulating diaphragm 38, which is clamped pressure-tight in the housing 30 at its edge in the region of the outlet chamber 32. The inlet and outlet chamber are thus separated from one another in the idle state via the closed valve 33, 35. The membrane divides a further chamber 39, from which a channel 40 leads to a valve center space 41. The valve center space 41 is delimited by two valve seats 42 and 43 and an outflow opening 44.

Vom Ventilsitz 43 führt ein Kanal 45 zu einer Verzweigungsstelle 46, von der ein weiterer Kanal 47 zur Auslaßkammer 32 führt. Ein weiterer Kanal 48 führt zu einer Membrankammer 49, die über eine Leitung 50, in der ein Ventilsitz 51 vorgesehen ist, mit der Abströmöffnung 44 verbunden ist. Mit dem Ventilsitz 51 korrespondiert ein Ventilkörper 52, der von einer sich gegenüber dem Gehäuse 30 abstützenden Druckfeder 53 in Öffnungstellung bewegbar und beherrscht ist. Der Ventilkörper 52 ist an einer Membran 54 befestigt, die unter der Wirkung einer Druckfeder 55 steht, die von einer Stellschraube 56 justierbar ist, die ihrerseits in einem Gewinde im Gehäuse 30 gasdicht geführt ist.A channel 45 leads from the valve seat 43 to a branching point 46, from which a further channel 47 leads to the outlet chamber 32. Another channel 48 leads to a membrane chamber 49, which is connected to the outflow opening 44 via a line 50, in which a valve seat 51 is provided. With the valve Seat 51 corresponds to a valve body 52 which is movable and controlled in the open position by a compression spring 53 which is supported relative to the housing 30. The valve body 52 is attached to a membrane 54 which is under the action of a compression spring 55 which is adjustable by an adjusting screw 56 which in turn is gastight in a thread in the housing 30.

Auf der der Membrankammer 49 abgewandten Seite der Membran 54 ist eine weitere Membrankammer 57 gebildet, die über eine Öffnung 58 mit einer weiteren Membrankammer 59 in Verbindung steht. Diese Membrankammer 59 wird außer von dem Gehäuse 30 von einer Membran 60 begrenzt, die auf der der Membrankammer 59 abgewandten Seite eine weitere Membrankammer 61 bildet, in welcher eine Druckfeder 62 gelagert ist, die sich gegenüber einem Federteller 63 abstützt. Der Federteller 63 ist mit der Stellstange 15 starr verbunden, die Stellstange trägt ein Anschlagstück 64, das sich über eine Druckfeder 65 gegenüber dem Gehäuse 30 elastisch abstützt. Das Anschlagstück 64 trägt eine als Anschlag wirkende Justierschraube 66, deren Spitze gegen die Oberseite des Gehäuses 30 bei maximalem Stellweg fahren kann, den maximalen Stellweg vom Gehäuse 30 weg begrenzt die Spitze einer weiteren Justierschraube 67, die in einem Fortsatz 68 des Gehäuses 30 eingeschraubt ist.On the side of the diaphragm 54 facing away from the diaphragm chamber 49, a further diaphragm chamber 57 is formed, which is connected to a further diaphragm chamber 59 via an opening 58. In addition to the housing 30, this membrane chamber 59 is delimited by a membrane 60, which forms a further membrane chamber 61 on the side facing away from the membrane chamber 59, in which a compression spring 62 is supported, which is supported with respect to a spring plate 63. The spring plate 63 is rigidly connected to the actuating rod 15, the actuating rod carries a stop piece 64 which is elastically supported against the housing 30 via a compression spring 65. The stop piece 64 carries an adjusting screw 66 acting as a stop, the tip of which can move against the upper side of the housing 30 with a maximum travel, the maximum travel away from the housing 30 limits the tip of a further adjustment screw 67, which is screwed into an extension 68 of the housing 30 .

Die Stellstange 15 durchsetzt die Wandung des Wasserschalters 16 und ist mit einem Membranteller 69 verbunden, der von einer Membran 70 getragen ist. Beiderseits der Membran werden Membrankammern 71 und 72 gebildet, die über die Lei- . tung 18 mit dem Strömungsmesser 19 verbunden sind. Der Strömungsmesser 19 ist in an sich bekannterweise als Venturi ausgestattet und liegt im Zapfwasserweg 20.The actuating rod 15 passes through the wall of the water scarf ter 16 and is connected to a membrane plate 69 which is supported by a membrane 70. Membrane chambers 71 and 72 are formed on both sides of the membrane. device 18 are connected to the flow meter 19. The flow meter 19 is known as a venturi and is located in the tap water path 20.

Die Membrankammer 61 ist über eine Drosselbohrung 73 mit der Atmosphäre verbunden. Mit der Membran 60 ist ein Ventilkörper 74 verbunden, der mit einem im Gehäuse 30 angeordneten Ventilsitz 75 korrespondiert. Der Ventilsitz 75 steht über eine Leitung 76 mit der Membrankammer 59 in Verbindung. Der Ventilkörper 74 steht unter der Wirkung einer Druckfeder 77, die sich gegenüber dem Gehäuse 30 abstützt und das Bestreben hat, den Ventilkörper 74 von seinem Ventilsitz 75 abzuheben. Auf der anderen Seite der Leitung 76 schließt sich an den Ventilsitz 75 eine Kammer 78 an, die über eine Bohrung 79 relativ kleinen Querschnitts mit der Membrankammer 59 und über eine Zuluftbohrung 80 sowie einen Luftfilter 81 mit der Atmosphäre verbunden ist. Über eine Ansaugleitung 82 ist die Kammer 78 mit dem Saugstutzen einer Membranpumpe 83 verbunden, die über eine Welle 84 von einem nicht dargestellten Motor angetrieben ist. Der Motor seinerseits ist von einem Stellglied mit Spannung beziehungsweise elektrischer Leistung beaufschlagbar, um ein bestimmtes Antriebsverhalten des Motors zu gewährleisten. Die Membranpumpe weist eine Druckleitung 85 auf, die über eine Drosselbohrung 86 mit der Membrankammer 59 in Verbindung steht.The membrane chamber 61 is connected to the atmosphere via a throttle bore 73. A valve body 74 is connected to the membrane 60, which corresponds to a valve seat 75 arranged in the housing 30. The valve seat 75 is connected to the membrane chamber 59 via a line 76. The valve body 74 is under the action of a compression spring 77, which is supported with respect to the housing 30 and tends to lift the valve body 74 from its valve seat 75. On the other side of the line 76, the valve seat 75 is adjoined by a chamber 78, which is connected to the membrane chamber 59 via a bore 79 of relatively small cross-section and to the atmosphere via a supply air bore 80 and an air filter 81. Via a suction line 82, the chamber 78 is connected to the suction port of a diaphragm pump 83 which is driven by a motor (not shown) via a shaft 84. The motor, in turn, can be supplied with voltage or electrical power by an actuator in order to ensure a certain drive behavior of the motor. The diaphragm pump has a pressure line 85 which is connected to the diaphragm chamber 59 via a throttle bore 86.

Von der Einlaßkammer 31 gelangt Gas über eine Drosselbohrung 87 in einen Operator-Raum 88, der von dem Ventilsitz 42 begrenzt ist. Im Inneren des Operator-Raums ist ein Elektromagnet 89 vorgesehen, der über eine elektrische Zuleitung 90 mit elektrischer Leistung speisbar ist. Mit dem Elektromagneten 89 wirkt ein Anker 91 zusammen, der als zweiarmiger Hebel 92 verlängert ist und bei 93 drehbar im Gehäuse 30 gelagert ist. Der Anker beziehungsweise der Hebel steht unter der Wirkung einer Zugfeder 94, die einen Endes am Gehäuse 30 befestigt ist. Am freien Ende des Hebels 92 ist über einen Drehpunkt 95 eine Stange 96 angelenkt, die mit einem Ventilkörper 97 verbunden ist, der mit den Ventilsitzen 42 und 43 korrespondiert.Gas passes from the inlet chamber 31 via a throttle bore 87 into an operator space 88 which is delimited by the valve seat 42. An electromagnet 89 is provided in the interior of the operator room and can be supplied with electrical power via an electrical feed line 90. An armature 91 cooperates with the electromagnet 89, which is extended as a two-armed lever 92 and is rotatably mounted in the housing 30 at 93. The armature or the lever is under the action of a tension spring 94 which is attached to the housing 30 at one end. At the free end of the lever 92, a rod 96 is articulated via a pivot point 95, which rod is connected to a valve body 97 which corresponds to the valve seats 42 and 43.

Der eben beschriebene Gasdruckregler gemäß Figur zwei hat folgende Funktion: Ausgehend von dem in der Zeichnung dargestellten Ruhezustand, ist der Ventilsitz 33 durch den Ventilkörper 35 unter der Ausdehnungswirkung der Druckfeder 36 verschlossen, das heißt, die Verbindung zwischen Gaseinlaß und Gasauslaß ist unterbrochen. Die Membranpumpe 83 ist in Ruhe, Druck- und Saugleitung 85 beziehungsweise 82 weisen zueinander keinen Differenzdruck auf. Die Ventile 97, 42 sowie 52, 51 und 74, 75 sind geschlossen. Der Elektromagnet 89 ist stromlos. Die Gaszufuhr zu dem Brenner 10 ist unterbrochen.The gas pressure regulator according to FIG. 2 just described has the following function: starting from the idle state shown in the drawing, the valve seat 33 is closed by the valve body 35 under the expansion effect of the compression spring 36, that is to say the connection between the gas inlet and gas outlet is interrupted. The diaphragm pump 83 is at rest, the pressure and suction lines 85 and 82 have no differential pressure with respect to one another. Valves 97, 42 and 52, 51 and 74, 75 are closed. The electromagnet 89 is without current. The gas supply to the burner 10 is interrupted.

Wird nun Gas am Brenner verlangt, so wird über die Leitung 90 der Elektromagnet 89 erregt, worauf dieser seinen Anker 91 anzieht und den Ventilkörper 97 vom Sitz 42 auf den Sitz 43 bewegt und diesen Ventilsitz gegen die Wirkung der Rückstellfeder 94 verschließt. Somit ist der Kanal 47 und damit der Gasauslaß von der Kammer 39 druckmäßig abgetrennt. Somit baut sich nunmehr Druck aus dem Gaseinlaß über die Einlaßkammer 31 und die Drosselbohrung 87 verzögert im Operator-Raum 88 auf. Der Ventilmittelraum steht bei geschlossenem Ventil 52, 51 über den Kanal 40 mit der Kammer 39 in Verbindung, so daß sich langsam ein Druck in dieser Kammer aufbaut, der dazu führt, daß der Ventilkörper 35 gegen die Rückstellkraft der Druckfeder 36 von seinem Ventilsitz33 abhebt. In diesem Moment beginnt Gas vom Einlaß über die Einlaßkammer 31 zur Auslaßkammer 32 und damit über die Leitung 13 zum Brenner zu fließen. Der Druck in der Kammer 39 wird jedoch dadurch begrenzt, daß sich in der Auslaßkammer 32 ein Staudruck, verursacht durch die Stauwirkung der Brennerdüsen, im Brenner aufbaut. Der Rück-staudruck wirkt über die Leitung 47 und 48 auf die Membrankammer 49 und ist bestrebt, bei Ansteigen über einen gewissen Wert die Membran 54 gegen die Rückstellkraft der Feder 55 zu bewegen. Die Druckschwelle, bei der diese Bewegung eintritt, ist über die Stellschraube 56 einstellbar. Eine Bewegung der Membran 54 gegen die Stellschraube 56 hat ein Abheben des Ventilkörpers 52 vom Ventilsitz 51 zur Folge, diese Bewegung wird durch Druckfeder 53 unterstützt. Die Charakteristik der Druckfeder 53 ist aber wesentlich schwächer als die der Druckfeder 55. Somit wird auch der Druck im Ventilmittelraum 41 begrenzt.If gas is now demanded from the burner, the electromagnet 89 is excited via the line 90, whereupon this causes its armature 91 attracts and moves the valve body 97 from the seat 42 to the seat 43 and closes this valve seat against the action of the return spring 94. Thus, the channel 47 and thus the gas outlet from the chamber 39 is separated in terms of pressure. Thus, pressure from the gas inlet via the inlet chamber 31 and the throttle bore 87 now builds up in the operator space 88 with a delay. When the valve 52, 51 is closed, the valve center space communicates with the chamber 39 via the channel 40, so that a pressure slowly builds up in this chamber, which leads to the valve body 35 lifting off from its valve seat 33 against the restoring force of the compression spring 36. At this moment, gas begins to flow from the inlet via the inlet chamber 31 to the outlet chamber 32 and thus via line 13 to the burner. However, the pressure in the chamber 39 is limited by the fact that a back pressure, caused by the back-up effect of the burner nozzles, builds up in the burner in the outlet chamber 32. The back pressure acts on the diaphragm chamber 49 via the lines 47 and 48 and strives to move the diaphragm 54 against the restoring force of the spring 55 when it rises above a certain value. The pressure threshold at which this movement occurs can be set using the adjusting screw 56. A movement of the membrane 54 against the adjusting screw 56 results in the valve body 52 being lifted off the valve seat 51, this movement being supported by compression spring 53. The characteristic of the compression spring 53 is, however, much weaker than that of the compression spring 55. Thus, the pressure in the valve center space 41 is also limited.

Die eben eingestellte Druckschwelle dient dazu, einen Gasdruck in der Auslaßkammer 32 sicherzustellen, der für ein einwandfreies Überzünden im Bereich des angeschlossenen Rostbrenners notwendig ist. Ein zu kleiner Druck in der Auslaßkammer 32 bewirkt ein nur teilweises Brennen der Gasflammen im Rostbrenner, zu großer Überdruck wird eine Verpuffungserscheinung in der Feuerstelle zur Folge haben.The pressure threshold just set is used to ensure a gas pressure in the outlet chamber 32, which is necessary for proper ignition in the area of the connected grate burner. If the pressure in the outlet chamber 32 is too low, the gas flames in the grate burner will only burn partially, and too high a pressure will result in a deflagration in the fireplace.

Soll nun der Gasdruck in der Auslaßkammer 32 auf einen Nennwert ansteigen, so wird die Welle 84 der Membranpumpe 83 beaufschlagt, so daß die Membranpumpe 83 zu fördern beginnt. Somit baut sich in der Membrankammer 59, verzögert durch die Drosselbohrung 86, ein Druck auf, der über die Öffnung 58 auch in der Membrankammer 57 ansteht. Das bedeutet, daß das Ventil 52, 51 mehr oder weniger geschlossen wird. Der hier anstehende Druck wird begrenzt durch eine Stellbewegung der Membran 60. Steigt der Druck in der Membrankammer 59 auf einen Wert an, der ein Einfahren der Membran 60 gegen die Rückstellkraft der Feder 62 bewirkt, so hebt der Ventilkörper 74 von seinem Sitz 75 unterstützt durch die Wirkung der Feder 77 ab. Damit wird der Druck in der Membrankammer 59 begrenzt. Somit ist die Höhe des Drucks in der Membrankammer 59 proportional dem jeweiligen Nenndruck des gasförmigen Brennstoffs im Brenner.If the gas pressure in the outlet chamber 32 is now to rise to a nominal value, the shaft 84 of the diaphragm pump 83 is acted on, so that the diaphragm pump 83 begins to deliver. Thus, delayed by the throttle bore 86, a pressure builds up in the membrane chamber 59, which pressure is also present in the membrane chamber 57 via the opening 58. This means that the valve 52, 51 is closed more or less. The pressure present here is limited by an actuating movement of the diaphragm 60. If the pressure in the diaphragm chamber 59 rises to a value which causes the diaphragm 60 to retract against the restoring force of the spring 62, the valve body 74 lifts from its seat 75 with the assistance of the action of the spring 77. This limits the pressure in the membrane chamber 59. The level of the pressure in the membrane chamber 59 is thus proportional to the respective nominal pressure of the gaseous fuel in the burner.

Die bis eben beschriebene Funktion des Gasdruckreglers gilt für Heizungsbetrieb. Der Nennwert, der eben beschrieben wurde, gilt somit auch für Heizbetrieb.The function of the gas pressure regulator described above applies to heating operation. The nominal value that has just been described therefore also applies to heating operation.

Wird nunmehr durch Aufdrehen des Zapfventils 22 Warmwasser angefordert, so beginnt Wasser aus dem Kaltwassernetz 20 über den Strömungsschalter 19 in die Rohrschlange 21 des Gebrauchswasserbereiters 7 zu fließen. Der Strömungsschalter 19 registriert den Brauchwasserdurchsatz und teilt ihn als Druckschwankung über die Meßleitung 18 dem Membranschalter 16 mit. Somit erfolgt Druckanstieg in der Membrankammer 71 und Druckabfall in der Membrankammer 72, was eine entsprechende Auslenkung der Membran 70 gegen die Rückstellkraft der Feder 65 veranlaßt. Die Stellstange 15 fährt aus dem Wasserschalter 16 aus und drückt die Druckfeder 62 zusammen. Das Zusammendrücken findet seine Grenze, wenn der Anschlag 66 gegen die Oberseite des Gehäuses 30 fährt. Die. Ruhestellung ist dadurch gegeben, daß das Anschlagstück 64 unter der Rückstellwirkung der Feder 65 gegen das freie Ende der Justierschraube 67 fährt. Durch Bewegen der Justierschraube 67 ist somit der Nennwert für den Gasdruck bei Heizungsbetrieb vorgegeben, durch Justieren der Justierschraube 66 kann somit ein gegenüber dem Druckwert für Heizbetrieb erhöhter Druckwert bei Brauchwasserzapfung vorgegeben werden. Beide Druckwerte werden über die Membran 60 konstantgehalten.If hot water is now requested by unscrewing the nozzle 22, water from the cold water network 20 begins to flow via the flow switch 19 into the coil 21 of the water heater 7. The flow switch 19 registers the process water flow rate and communicates it to the membrane switch 16 as a pressure fluctuation via the measuring line 18. Thus, there is an increase in pressure in the diaphragm chamber 71 and a drop in pressure in the diaphragm chamber 72, which causes a corresponding deflection of the diaphragm 70 against the restoring force of the spring 65. The actuating rod 15 extends from the water switch 16 and compresses the compression spring 62. Compression is limited when the stop 66 moves against the top of the housing 30. The. Rest position is given in that the stop piece 64 moves under the restoring action of the spring 65 against the free end of the adjusting screw 67. By moving the adjusting screw 67, the nominal value for the gas pressure during heating operation is thus specified. By adjusting the adjusting screw 66, an increased pressure value compared to the pressure value for heating operation can therefore be specified when using domestic hot water. Both pressure values are kept constant via the membrane 60.

Der Motor der Membranpumpe ist, wie bereits geschildert, steuerbar. Je höher mithin der Förderdruck der Membranpumpe 83 ist, um so höher ist der Druck in der Membrankammer 59. Je größer dort der Druck ist, um so größer ist die Schließkraft des Ventils 52, 51. Je mehr dieses Ventil geschlossen wird, um so größer ist über den Operator-Raum 88 beziehungsweise über den Druckweg 47, 48, 50, 44, 40 der Druck, der sich in der Kammer 39 aufbaut und der einen sich vergrößernden Gasdruck in der Auslaßkammer 32 zur Folge hat.As already described, the motor of the diaphragm pump can be controlled. The higher the delivery pressure of the diaphragm pump 83, the higher the pressure in the diaphragm chamber 59. The greater the pressure there, the greater the closing force of the valve 52, 51. The more this valve is closed the greater the pressure that builds up in the chamber 39 and that results in an increasing gas pressure in the outlet chamber 32 via the operator room 88 or via the pressure path 47, 48, 50, 44, 40.

Soll der Brenner stillgesetzt werden, so wird die Beaufschlagung der Membranpumpe 83 unterbrochen. Das bedeutet, daß die Membrankammer 57 drucklos wird, da die Druckdifferenz zwischen Saug- und Druckstutzen der Membranpumpe über die Drosselbohrung 79 abgebaut wird. Das bedingt ein Öffnen des Ventils 52, 51, der Druck in der Gasauslaßkammer 32 wird über den Kanal 40 abgebaut, das heißt, es steht nur noch der Vordruck aus der Einlaßkammer 31 über die Bohrung 87, geringfügig entlastet über den angehobenen Ventilkörper 97, in der Kammer 39 an, so daß unter der Rückstellkraft der Feder 36 der Ventilkörper 35 sehr nah an seinen Sitz 33 herangedrückt wird. Somit steht nur noch der Überzündgasstrom in der Auslaßkammer 32 an, der auch unterbrochen werden kann, wenn man die Stromzuführung auf der Leitung 90 unterbricht, da dann unter der Rückstellwirkung der Feder 94 der Ventilkörper 97 von seinem Sitz 43 weg auf den Sitz 42 gedrückt wird. Die Kammer 39 wird nunmehr druckentlastet.If the burner is to be stopped, the action on the diaphragm pump 83 is interrupted. This means that the diaphragm chamber 57 is depressurized, since the pressure difference between the suction and pressure ports of the diaphragm pump is reduced via the throttle bore 79. This requires opening the valve 52, 51, the pressure in the gas outlet chamber 32 is reduced via the channel 40, that is, there is only the upstream pressure from the inlet chamber 31 through the bore 87, slightly relieved via the raised valve body 97, in the chamber 39, so that under the restoring force of the spring 36 the valve body 35 is pressed very close to its seat 33. Thus, only the overfire gas flow is present in the outlet chamber 32, which can also be interrupted if the power supply on the line 90 is interrupted, since then under the restoring action of the spring 94 the valve body 97 is pressed away from its seat 43 onto the seat 42 . The chamber 39 is now relieved of pressure.

Claims (2)

1. Gasdruckregler für einen Umlaufwasserheizer mit einem Gebrauchswasserbereiter mit einem in einem Gehäuse angeordneten von einem federrückstellbaren Ventilkörper beherrschten Ventilsitz, dessen Ventilkörper mit einer Stellmembrane verbunden ist, die dem Gasdruck hinter.dem Ventil in der Auslaßkammer ausgesetzt ist, und mit einer Regelmembrane, die einerseits dem Gasdruck hinter dem Ventil ausgesetzt ist, und mit einer Fluid-Pumpe, wobei die dem Gas abgewandte Seite der Stellmembran nur vom Druck der Fluid-Pumpe beaufschlagt ist und dieser Druck von einem mit der von einer Feder belasteten Regelmembran gekoppelten Ventil begrenzt ist,cadumch gekennzeichnet, daß ein Abstützglied (63) für die Feder (62) mit einer Stellstange (15) eines Strömungsmessers (19, 16) verbunden ist, der einem Zapfwasserweg (20, 21, 22) des Gebrauchswasserbereiters (7) zugeordnet ist.1.Gas pressure regulator for a circulating water heater with a water heater with a valve seat arranged in a housing and controlled by a spring-returnable valve body, the valve body of which is connected to an actuating membrane which is exposed to the gas pressure behind the valve in the outlet chamber and with a regulating membrane which on the one hand is exposed to the gas pressure behind the valve, and with a fluid pump, the side of the actuating membrane facing away from the gas being acted upon only by the pressure of the fluid pump and this pressure being limited by a valve coupled to the control membrane loaded by a spring, cadumch characterized in that a support member (63) for the spring (62) is connected to an actuating rod (15) of a flow meter (19, 16) which is assigned to a tap water path (20, 21, 22) of the water heater (7). 2. Gasdruckregler nach Anspruch 1, dadurch gekennzeichnet, daß die Stellstange (15) mit einem Anschlagstück (64) versehen ist, das zwischen 2 einstellbaren Anschlägen (66, 67) beweglich gelagert ist.2. Gas pressure regulator according to claim 1, characterized in that the adjusting rod (15) is provided with a stop piece (64) which is movably mounted between 2 adjustable stops (66, 67).
EP81101003A 1980-02-22 1981-02-13 Gas pressure regulator Expired EP0035147B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101003T ATE8700T1 (en) 1980-02-22 1981-02-13 GAS PRESSURE REGULATOR.

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DE19808005149U DE8005149U1 (en) 1980-02-22 1980-02-22 GAS PRESSURE REGULATOR
DE8005149U 1980-02-22

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EP0035147A1 true EP0035147A1 (en) 1981-09-09
EP0035147B1 EP0035147B1 (en) 1984-07-25

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103303A2 (en) * 1982-09-15 1984-03-21 Joh. Vaillant GmbH u. Co. Fuel-heated heat source
EP0108349A2 (en) * 1982-10-30 1984-05-16 Joh. Vaillant GmbH u. Co. Gas-fired heat source
DE3524015A1 (en) * 1984-07-13 1986-02-13 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Gas-pressure regulator
AT397850B (en) * 1989-12-12 1994-07-25 Vaillant Gmbh GAS PRESSURE REGULATOR
EP0989366A1 (en) * 1998-07-01 2000-03-29 Sit la Precisa S.p.a. A valve unit for automatically regulating the flow-rate of a fuel gas

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116112A5 (en) * 1970-11-27 1972-07-07 Junkers & Co
GB2027851A (en) * 1978-08-11 1980-02-27 Matsushita Electric Ind Co Ltd Controlling burner fuel supply in fluid heating apparatus
EP0016326A1 (en) * 1979-02-14 1980-10-01 Joh. Vaillant GmbH u. Co. Gas-pressure controller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116112A5 (en) * 1970-11-27 1972-07-07 Junkers & Co
GB2027851A (en) * 1978-08-11 1980-02-27 Matsushita Electric Ind Co Ltd Controlling burner fuel supply in fluid heating apparatus
FR2433159A1 (en) * 1978-08-11 1980-03-07 Matsushita Electric Ind Co Ltd APPARATUS FOR CONTROLLING THE TEMPERATURE OF THE HEATING OF A FLUID
EP0016326A1 (en) * 1979-02-14 1980-10-01 Joh. Vaillant GmbH u. Co. Gas-pressure controller

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103303A2 (en) * 1982-09-15 1984-03-21 Joh. Vaillant GmbH u. Co. Fuel-heated heat source
EP0103303A3 (en) * 1982-09-15 1984-06-06 Joh. Vaillant GmbH u. Co. Fuel-heated heat source
EP0108349A2 (en) * 1982-10-30 1984-05-16 Joh. Vaillant GmbH u. Co. Gas-fired heat source
EP0108349A3 (en) * 1982-10-30 1985-05-02 Joh. Vaillant GmbH u. Co. Gas-fired heat source
DE3524015A1 (en) * 1984-07-13 1986-02-13 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Gas-pressure regulator
AT397850B (en) * 1989-12-12 1994-07-25 Vaillant Gmbh GAS PRESSURE REGULATOR
EP0989366A1 (en) * 1998-07-01 2000-03-29 Sit la Precisa S.p.a. A valve unit for automatically regulating the flow-rate of a fuel gas

Also Published As

Publication number Publication date
DE8005149U1 (en) 1981-11-19
ATE8700T1 (en) 1984-08-15
EP0035147B1 (en) 1984-07-25

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