EP1729056A1 - Protection system for devices indicating gas pressure - Google Patents

Protection system for devices indicating gas pressure Download PDF

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Publication number
EP1729056A1
EP1729056A1 EP05300446A EP05300446A EP1729056A1 EP 1729056 A1 EP1729056 A1 EP 1729056A1 EP 05300446 A EP05300446 A EP 05300446A EP 05300446 A EP05300446 A EP 05300446A EP 1729056 A1 EP1729056 A1 EP 1729056A1
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EP
European Patent Office
Prior art keywords
gas
internal passage
pressure
passage
spherical
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.)
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Application number
EP05300446A
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German (de)
French (fr)
Inventor
Silvano Bendazzoli
Alessandro Moretti
Andrea Magagna
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FRO SpA
Original Assignee
FRO SpA
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Publication date
Application filed by FRO SpA filed Critical FRO SpA
Priority to EP05300446A priority Critical patent/EP1729056A1/en
Publication of EP1729056A1 publication Critical patent/EP1729056A1/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • F17C2203/0643—Stainless steels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0648—Alloys or compositions of metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/018—Acetylene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure

Definitions

  • the invention relates to a protection means for preventing the deterioration of a pressure indicating device, such as a manometer in the event of decomposition of acetylene in an expansion valve, a tap or a gas channel.
  • a pressure indicating device such as a manometer in the event of decomposition of acetylene in an expansion valve, a tap or a gas channel.
  • the problem to be solved is to improve the protection of the pressure indicating device, such as the high-pressure gauge of an acetylene pressure reducer or of an integrated pressure reducing valve block per acetylene container, so as to reduce , minimize or totally stop the negative effects of decomposition of acetylene on said manometer, preventing any dangerous projection of parts outwardly, composing the manometer.
  • the pressure indicating device such as the high-pressure gauge of an acetylene pressure reducer or of an integrated pressure reducing valve block per acetylene container
  • the solution of the invention is then a gas distribution device, in particular acetylene, comprising an internal passage for the gas fluidically connected to at least one pressure gauge so as to measure the pressure of the gas in said internal passage, characterized in that at least one protective element of the manometer is arranged in said internal passage upstream of the manometer.
  • a gas distribution device in particular acetylene, comprising an internal passage for the gas fluidically connected to at least one pressure gauge so as to measure the pressure of the gas in said internal passage, characterized in that at least one protective element of the manometer is arranged in said internal passage upstream of the manometer.
  • the device of the invention can be arranged on a gas cylinder or on a gas routing pipe.
  • FIG. 1 represents a first embodiment of the invention in which a pressure gauge 1 is protected from any accidental deterioration due to an unexpected decomposition of acetylene by means of a cylindrical element 3 with external peripheral screw thread arranged in the passage 2 bringing gas, ie acetylene, up to the manometer 1 to measure its pressure.
  • the fact of incorporating a protection element 3 according to the invention in the passage 2 makes it possible to reduce the shock wave due to the decomposition of the acetylene and thus to reduce the energy of the gas to a level such that no deterioration of gauge 1 will occur. Indeed, the shock wave will be attenuated thanks to the protective element 3 since the energy of the gas, the pressure of which has suddenly increased, will be attenuated and diminished during its circulation in the turns of the helix of the peripheral screw thread. the protective element 3.
  • FIG. 2 shows a second embodiment in which the protection element 3 takes the form of a cylinder perforated longitudinally of an axial channel allowing the passage of the gas and preferably bearing a seal on its outer wall in a manner to guarantee a gaseous seal between this protective element 3 and the inner wall of the gas passage 2.
  • any gas overpressure is also attenuated by being channeled and conveyed by the central channel of the cylindrical element 3.
  • FIGS. 3 and 4 show other embodiments according to which, in addition to the elements 3 of FIG. 1 or 2, a second protection element 3 'has been incorporated, further reinforcing the protection and safety in the event of decomposition of acetylene, namely a spherical ball situated, as the case may be, upstream (FIG. 4) or downstream (FIG. 3) of the aforementioned cylindrical protection elements, by considering the direction of passage of the gas, that is to say the internal passage 2 to the manometer 1.
  • the solution of the invention is particularly simple and economical and allows, in addition, to successfully meet the acetylene decomposition test in accordance with the requirements of EN ISO 7291.
  • the aforementioned elements 3 and 3 'of protection are preferably made of a metal or metal alloy, such as stainless steel, brass or others.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The device has an inner passage (2) for a gas that is fluidically connected to a high pressure manometer (1) so as to measure the pressure of the gas in the passage. Spherical and cylindrical protection units are arranged in a passage upstream of the manometer (1). The cylindrical unit comprises a helical screw thread formed on its outer wall and is situated between the spherical units and the manometer.

Description

L'invention porte sur un moyen de protection permettant d'éviter la détérioration d'un dispositif indicateur de pression, tel un manomètre en cas de décomposition de l'acétylène dans un détendeur, un robinet ou une canalisation de gaz.The invention relates to a protection means for preventing the deterioration of a pressure indicating device, such as a manometer in the event of decomposition of acetylene in an expansion valve, a tap or a gas channel.

Le montage d'un manomètre, bien que conforme aux normes EN 562 ou ISO 5171, ne permet pas de passer le test décrit par la norme EN ISO 7291.Mounting a pressure gauge, although compliant with EN 562 or ISO 5171, does not allow the test described by EN ISO 7291 to be carried out.

Donc, toutes les fois que le test est réalisé en testant le détendeur de pression, avec des bouchons à la place des manomètres, il apparaît que les manomètres, dans les centrales de détente de gaz, ne doivent pas obligatoirement faire partie intégrante du détendeur.So, whenever the test is performed by testing the pressure regulator, with plugs instead of manometers, it appears that pressure gauges, in the gas expansion plants, do not necessarily have to be an integral part of the regulator.

Or, c'est évidemment une carence normative que ne soient pas requis de tests spécifiques de résistance des manomètres montés séparément du réducteur de pression, c'est-à-dire du détendeur de gaz, contrairement à ce qui est exigé pour les autres composants des centrales selon la norme EN ISO 15615.However, it is obviously a normative deficiency that are not required specific tests of resistance of pressure gauges mounted separately from the pressure reducer, that is to say the gas expander, contrary to what is required for the other components power plants according to EN ISO 15615.

Une autre solution consiste à l'utilisation de manomètres spéciaux selon la norme EN 837-1 version renforcée S3. Cependant, cette solution présente les inconvénients suivants :

  • l'utilisation d'un manomètre notablement plus onéreux ;
  • ils sont difficilement repérables, identifiables, et il peut alors arriver qu'en cas de mauvais fonctionnement d'un tel manomètre, celui-ci soit démonté et remplacé par un manomètre ayant un niveau de sécurité inférieur, ce qui pose des problèmes évidents de sécurité ;
  • rien ne permet de garantir que les manomètres de ce type puissent passer avec succès un test de décomposition d'acétylène selon les normes EN ISO 7291 ou 15615.
Another solution is the use of special pressure gauges according to EN 837-1 reinforced version S3. However, this solution has the following drawbacks:
  • the use of a significantly more expensive manometer;
  • they are difficult to identify, identifiable, and it may happen that in case of malfunction of such a pressure gauge, it is removed and replaced by a manometer having a lower level of safety, which poses obvious safety problems ;
  • there is no guarantee that pressure gauges of this type can pass an acetylene decomposition test in accordance with EN ISO 7291 or 15615.

Autrement dit, le problème à résoudre est d'améliorer la protection du dispositif indicateur de pression, tel le manomètre haute pression d'un détendeur d'acétylène ou d'un bloc robinet à détendeur intégré par récipient d'acétylène, de manière à diminuer, minimiser ou totalement stopper les effets négatifs de la décomposition d'acétylène sur ledit manomètre, en empêchant toute projection dangereuse des pièces vers l'extérieur, composant le manomètre.In other words, the problem to be solved is to improve the protection of the pressure indicating device, such as the high-pressure gauge of an acetylene pressure reducer or of an integrated pressure reducing valve block per acetylene container, so as to reduce , minimize or totally stop the negative effects of decomposition of acetylene on said manometer, preventing any dangerous projection of parts outwardly, composing the manometer.

La solution de l'invention est alors un dispositif de distribution de gaz, en particulier d'acétylène, comprenant un passage interne pour le gaz relié fluidiquement au moins un manomètre de manière à permettre de mesurer la pression du gaz régnant dans ledit passage interne, caractérisé en ce qu'au moins un élément de protection du manomètre est agencé dans ledit passage interne en amont du manomètre.The solution of the invention is then a gas distribution device, in particular acetylene, comprising an internal passage for the gas fluidically connected to at least one pressure gauge so as to measure the pressure of the gas in said internal passage, characterized in that at least one protective element of the manometer is arranged in said internal passage upstream of the manometer.

Selon le cas, le dispositif selon l'invention peut comprendre l'une ou l'autre des caractéristiques suivantes :

  • l'élément de protection a une forme de sphère, de cylindre avec pas de vis hélicoïdal formé sur sa paroi externe, ou de cylindre perforé d'un canal longitudinal d'un diamètre inférieur au diamètre du passage interne.
  • le passage interne comporte une combinaison de deux éléments successifs de forme différentes.
  • le passage interne comporte un premier élément de forme sphérique et un second élément de forme cylindrique.
  • le passage interne comporte un premier élément de forme sphérique et un second élément de forme cylindrique avec filetage périphérique externe, le premier élément sphérique étant situé entre le second élément cylindrique et le dispositif indicateur de pression.
  • le passage interne comporte un premier élément de forme sphérique et un second élément de forme cylindrique avec canal central longitudinal, le second élément cylindrique étant situé entre le premier élément sphérique et le manomètre.
  • le dispositif est choisi parmi les robinets, les détendeurs et les robinets-détendeurs de gaz.
  • le dispositif indicateur de pression est un manomètre.
As the case may be, the device according to the invention may comprise one or the other of the following characteristics:
  • the protective element has a shape of a sphere, a cylinder with a helical screw pitch formed on its outer wall, or a perforated cylinder of a longitudinal channel of a diameter smaller than the diameter of the internal passage.
  • the internal passage comprises a combination of two successive elements of different shape.
  • the internal passage comprises a first spherical element and a second cylindrical element.
  • the inner passage comprises a first spherical element and a second cylindrical element with external peripheral thread, the first spherical element being located between the second cylindrical element and the pressure indicator device.
  • the inner passage comprises a first spherical element and a second cylindrical element with a longitudinal central channel, the second cylindrical element being located between the first spherical element and the pressure gauge.
  • the device is chosen from taps, regulators and gas regulating valves.
  • the pressure indicator device is a pressure gauge.

Le dispositif de l'invention peut être agencé sur une bouteille de gaz ou sur une canalisation d'acheminement de gaz.The device of the invention can be arranged on a gas cylinder or on a gas routing pipe.

La figure 1 représente un premier mode de réalisation de l'invention dans lequel un manomètre 1 est protégé de toute dégradation accidentelle due à une décomposition inopinée d'acétylène au moyen d'un élément cylindrique 3 à pas de vis périphérique externe agencé dans le passage 2 amenant le gaz, c'est à dire l'acétylène, jusqu'au manomètre 1 pour y mesurer sa pression.FIG. 1 represents a first embodiment of the invention in which a pressure gauge 1 is protected from any accidental deterioration due to an unexpected decomposition of acetylene by means of a cylindrical element 3 with external peripheral screw thread arranged in the passage 2 bringing gas, ie acetylene, up to the manometer 1 to measure its pressure.

En effet, une décomposition d'acétylène s'accompagne toujours d'une augmentation brusque de la pression et de la température du gaz au sein du passage 2 interne.Indeed, decomposition of acetylene is always accompanied by a sudden increase in the pressure and the temperature of the gas within the internal passage 2.

Or, le fait d'incorporer un élément 3 de protection selon l'invention dans le passage 2 permet de réduire l'onde de choc due à la décomposition de l'acétylène et ainsi de diminuer l'énergie du gaz jusqu'à un niveau tel qu'aucune détérioration du manomètre 1 ne se produira. En effet, l'onde de choc sera atténuée grâce à l'élément 3 protecteur puisque l'énergie du gaz dont la pression aura augmentée subitement sera atténuée et diminuée lors de sa circulation dans les spires de l'hélice du pas de vis périphérique à l'élément 3 protecteur.However, the fact of incorporating a protection element 3 according to the invention in the passage 2 makes it possible to reduce the shock wave due to the decomposition of the acetylene and thus to reduce the energy of the gas to a level such that no deterioration of gauge 1 will occur. Indeed, the shock wave will be attenuated thanks to the protective element 3 since the energy of the gas, the pressure of which has suddenly increased, will be attenuated and diminished during its circulation in the turns of the helix of the peripheral screw thread. the protective element 3.

La figure 2 représente un deuxième mode de réalisation dans lequel l'élément 3 de protection revêt la forme d'un cylindre perforé longitudinalement d'un canal axial permettant le passage du gaz et portant préférentiellement un joint d'étanchéité sur sa paroi externe de manière à garantir une étanchéité gazeux entre cet élément 3 protecteur et la paroi interne du passage 2 de gaz. Dans ce cas, toute surpression de gaz est également atténuée en étant canalisée et acheminée par le canal central de l'élément cylindrique 3.FIG. 2 shows a second embodiment in which the protection element 3 takes the form of a cylinder perforated longitudinally of an axial channel allowing the passage of the gas and preferably bearing a seal on its outer wall in a manner to guarantee a gaseous seal between this protective element 3 and the inner wall of the gas passage 2. In this case, any gas overpressure is also attenuated by being channeled and conveyed by the central channel of the cylindrical element 3.

Les figures 3 et 4 représentent d'autres modes de réalisation selon lesquels, en plus des éléments 3 des figures 1 ou 2, a été incorporé un second élément 3' de protection venant renforcer encore la protection et la sécurité en cas de décomposition d'acétylène, à savoir une bille sphérique située, selon le cas, en amont (figure 4) ou en aval (figure 3) des éléments de protection cylindriques susmentionnés, en considérant le sens de passage du gaz, c'est-à-dire du passage 2 interne vers le manomètre 1.FIGS. 3 and 4 show other embodiments according to which, in addition to the elements 3 of FIG. 1 or 2, a second protection element 3 'has been incorporated, further reinforcing the protection and safety in the event of decomposition of acetylene, namely a spherical ball situated, as the case may be, upstream (FIG. 4) or downstream (FIG. 3) of the aforementioned cylindrical protection elements, by considering the direction of passage of the gas, that is to say the internal passage 2 to the manometer 1.

Le fait de combiner deux éléments 3 et 3' de protection de formes différentes a permis d'obtenir d'excellents résultats lors d'essais industriels, en limitant encore plus le débit / la pression du flux de gaz engendré lors de la survenance d'une décomposition d'acétylène.The fact of combining two protection elements 3 and 3 'of different shapes has made it possible to obtain excellent results during industrial tests, by further limiting the flow rate / pressure of the gas flow generated during the occurrence of an acetylene decomposition.

La solution de l'invention est particulièrement simple et économique et permet, en outre, de satisfaire avec succès au test de décomposition de l'acétylène conformément aux exigences de la norme EN ISO 7291.The solution of the invention is particularly simple and economical and allows, in addition, to successfully meet the acetylene decomposition test in accordance with the requirements of EN ISO 7291.

Les éléments 3 et 3'de protection susmentionnés sont préférentiellement réalisés en un métal ou alliage métallique, tel l'acier inoxydable, le laiton ou autres.The aforementioned elements 3 and 3 'of protection are preferably made of a metal or metal alloy, such as stainless steel, brass or others.

Claims (10)

Dispositif de distribution de gaz, en particulier d'acétylène, comprenant un passage interne (2) pour le gaz relié fluidiquement au moins un dispositif indicateur de pression (1) de manière à permettre de mesurer la pression du gaz régnant dans ledit passage interne (2), caractérisé en ce qu'au moins un élément de protection (3, 3')) est agencé dans ledit passage interne (2) en amont du dispositif indicateur de pression (1).Gas distribution device, in particular of acetylene, comprising an internal passage (2) for the gas fluidically connected to at least one pressure indicating device (1) so as to make it possible to measure the pressure of the gas prevailing in said internal passage ( 2), characterized in that at least one protective element (3, 3 ')) is arranged in said internal passage (2) upstream of the pressure indicator device (1). Dispositif selon la revendication 1, caractérisé en ce qu'au moins un élément de protection (3,3') a une forme de sphère, de cylindre avec pas de vis hélicoïdal formé sur sa paroi externe, ou de cylindre perforé d'un canal longitudinal d'un diamètre inférieur au diamètre du passage (2) interne.Device according to Claim 1, characterized in that at least one protective element (3,3 ') has the shape of a sphere, a cylinder with a helicoidal thread formed on its outer wall, or a perforated cylinder of a channel. longitudinal diameter less than the diameter of the passage (2) internal. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le passage (2) interne comporte une combinaison de deux éléments (3,3') successifs de forme différentes.Device according to claim 1 or 2, characterized in that the internal passage (2) comprises a combination of two successive elements (3,3 ') of different shape. Dispositif selon la revendication 1 à 3, caractérisé en ce que le passage (2) interne comporte un premier élément (3') de forme sphérique et un second élément (3) de forme cylindrique.Device according to claims 1 to 3, characterized in that the internal passage (2) comprises a first spherical element (3 ') and a second cylindrical element (3). Dispositif selon la revendication 1 à 4, caractérisé en ce que le passage (2) interne comporte un premier élément (3') de forme sphérique et un second élément (3) de forme cylindrique avec filetage périphérique externe, le premier élément sphérique (3') étant situé entre le second élément cylindrique (3) et le dispositif indicateur de pression (1).Device according to claim 1 to 4, characterized in that the internal passage (2) comprises a first spherical element (3 ') and a second cylindrical element (3) with external peripheral thread, the first spherical element (3). ') being located between the second cylindrical element (3) and the pressure indicating device (1). Dispositif selon la revendication 1 à 4, caractérisé en ce que le passage (2) interne comporte un premier élément (3,3') de forme sphérique et un second élément (3) de forme cylindrique avec canal central longitudinal, le second élément cylindrique (3) étant situé entre le premier élément sphérique (3') et le manomètre.Device according to claim 1 to 4, characterized in that the internal passage (2) comprises a first spherical element (3,3 ') and a second cylindrical element (3) with a longitudinal central channel, the second cylindrical element (3) being located between the first spherical element (3 ') and the manometer. Dispositif selon la revendication 1 à 6, caractérisé en ce qu'il est choisi pami les robinets, les détendeurs et les robinets-détendeurs de gaz.Device according to one of claims 1 to 6, characterized in that the valves, regulators and gas regulating valves are selected. Dispositif selon les revendications 1 à 7, caractérisé en ce que le dispositif indicateur de pression (1) est un manomètre.Device according to claims 1 to 7, characterized in that the pressure indicating device (1) is a pressure gauge. Bouteille de gaz équipée d'un dispositif de distribution de gaz selon l'une des revendications 1 à 8.Gas cylinder equipped with a gas distribution device according to one of claims 1 to 8. Canalisation d'acheminement de gaz, caractérisée en ce qu'elle est équipée d'un dispositif de distribution de gaz selon l'une des revendications 1 à 8.Gas routing pipe, characterized in that it is equipped with a gas distribution device according to one of claims 1 to 8.
EP05300446A 2005-06-02 2005-06-02 Protection system for devices indicating gas pressure Withdrawn EP1729056A1 (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1619444A (en) * 1926-07-08 1927-03-01 Taylor Doc Gilford Antichattering device
US1622843A (en) * 1924-08-16 1927-03-29 Meriam Company Primary gauge stabilizer
US1941613A (en) * 1932-09-23 1934-01-02 Mcdonell Rob Roy Pressure gauge stabilizer
FR947574A (en) * 1947-06-06 1949-07-06 Pressure indicator for compressed gas cylinders
GB1421117A (en) * 1971-10-21 1976-01-14 Apex Constr Ltd Pressure check valve
US4413524A (en) * 1982-03-26 1983-11-08 Dresser Industries, Inc. Pulsation throttling device for a pressure gauge
US5343754A (en) * 1990-12-28 1994-09-06 Hi-Stat Manufacturing Co., Inc. Pressure transducer
EP0818672A1 (en) * 1996-07-12 1998-01-14 Aldiso, S.L. Bourdon tube for protection against excess pressure in pressure gauges
US6167908B1 (en) * 1999-04-19 2001-01-02 Vti Ventil Technik Gmbh Valve assembly for an apparatus under pressure

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1622843A (en) * 1924-08-16 1927-03-29 Meriam Company Primary gauge stabilizer
US1619444A (en) * 1926-07-08 1927-03-01 Taylor Doc Gilford Antichattering device
US1941613A (en) * 1932-09-23 1934-01-02 Mcdonell Rob Roy Pressure gauge stabilizer
FR947574A (en) * 1947-06-06 1949-07-06 Pressure indicator for compressed gas cylinders
GB1421117A (en) * 1971-10-21 1976-01-14 Apex Constr Ltd Pressure check valve
US4413524A (en) * 1982-03-26 1983-11-08 Dresser Industries, Inc. Pulsation throttling device for a pressure gauge
US5343754A (en) * 1990-12-28 1994-09-06 Hi-Stat Manufacturing Co., Inc. Pressure transducer
EP0818672A1 (en) * 1996-07-12 1998-01-14 Aldiso, S.L. Bourdon tube for protection against excess pressure in pressure gauges
US6167908B1 (en) * 1999-04-19 2001-01-02 Vti Ventil Technik Gmbh Valve assembly for an apparatus under pressure

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