WO2023126044A1 - High-flow rate air bleed with inbuilt stopcock - Google Patents

High-flow rate air bleed with inbuilt stopcock Download PDF

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Publication number
WO2023126044A1
WO2023126044A1 PCT/DZ2022/050014 DZ2022050014W WO2023126044A1 WO 2023126044 A1 WO2023126044 A1 WO 2023126044A1 DZ 2022050014 W DZ2022050014 W DZ 2022050014W WO 2023126044 A1 WO2023126044 A1 WO 2023126044A1
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WO
WIPO (PCT)
Prior art keywords
valve
air
water
orifice
float
Prior art date
Application number
PCT/DZ2022/050014
Other languages
French (fr)
Inventor
Ismet Nabil MANAMANI
Original Assignee
Manamani Ismet Nabil
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 Manamani Ismet Nabil filed Critical Manamani Ismet Nabil
Publication of WO2023126044A1 publication Critical patent/WO2023126044A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
    • F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
    • F16K24/044—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float the float being rigidly connected to the valve element, the assembly of float and valve element following a substantially translational movement when actuated, e.g. also for actuating a pilot valve
    • 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
    • F24D19/00—Details
    • F24D19/08—Arrangements for drainage, venting or aerating
    • F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
    • F24D19/083—Venting arrangements
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/071—Arrangement of safety devices in domestic pipe systems, e.g. devices for automatic shut-off

Definitions

  • the present invention relates to a device which, introduced into a pipe or water pipe, makes it possible to perform the function of a high-speed air vent valve while performing the function of a main shut-off valve.
  • the new device according to the invention overcomes these drawbacks.
  • the new device according to the invention has a reduced number of parts simplifying the manufacture and assembly of the device by going from 29 parts on the old device to only 15 parts in total on the new device.
  • the new device according to the invention presents the introduction of a new technique making it possible to neutralize the impact of the passage of pneumatic shock waves while eliminating the need to resort to the inertial balance formed by the assembly of parts. indicated in the previous paragraph as follows:
  • the basic shape of the upper valve has been separated into two parts "the lower part of the valve and the upper part of the valve" by the introduction of an intermediate volume.
  • This volume allows the passage of the air to be evacuated in the first place between the two parts of the valve, thus eliminating its passage through the lower part of this valve, and secondly, the air circulates above the stem of the valve to escape through the upper part of the valve.
  • downward Newtonian forces appear above the valve stem. The more the air flow and its pressure increase, the more the Newtonian forces force the float to close the water evacuation path with higher forces, thus stabilizing the overall operation of the trap and considerably increasing its performance.
  • the new device according to the invention now only requires a single float which is connected to the stem of the upper valve to form a single entity which moves together. During the passage of the air, this assembly is found at the bottom, thus blocking the way out of the water. When the water passes, the assembly moves upwards, thus blocking the passage of air.
  • the new device according to the invention presents a major contribution compared to the device such as that registered under the number "INAPI 050048" thus transforming it into a high flow rate trap with main shut-off valve.
  • the "air or water” fluid introduction orifice inside the trap is oriented in a horizontal direction towards the walls opposite the float. Consequently, the disturbances of the float by the air pressure waves as well as the first jets of water droplets under pressure are considerably reduced.
  • FIG. 1 shows in section, the device of the invention.
  • Figure 2 shows in section, with oriented arrows, the passage of air from the inlet to the exhaust outlet.
  • Figure 3 shows in section, with oriented arrows and shaded areas, the passage of water from the inlet to the outlet.
  • Figure 4 (A) shows the front view of the lower block of the device.
  • Figure 4 (B) shows the projected 3D view of the lower block of the device.
  • the device composed of two container parts, the lower block (1) and the upper block (2).
  • Part (4) represents the upper part of the valve while part (5) of the upper block represents the lower part of the valve. These two parts are separated by the volume (7). The latter allows the air to escape without it passing through the lower part of the valve, thus immunizing the device from untimely blocking problems.
  • the valve (3) performs the function of the main shut-off valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Abstract

The device, which is introduced into a water pipe or main, allows air to be bled out at a high flow rate while at the same time performing a stopcock function. It consists of two container units (1) and (2) which form the casing of the device. It has a fluid inlet orifice (A) for water or air, a water outlet orifice (C) and an air discharge orifice (B), the orifice (C) being sealed by the float (8) in the absence of water or when air is passing. When water is passing, the assembly made up of the float (8) and the stem of the valve (6) moves upwards, sealing the air outlet orifice. The volume (7) introduced between the upper part (4) of the valve (6) and the lower part (5) thereof allows the bleed device to be stabilized while air is being discharged. The device according to the invention is particularly intended to be installed upstream of a water meter.

Description

« Purgeur d'air à haut débit avec robinet d'arrêt intégré » Description “High flow air vent valve with integrated shut-off valve” Description
La présente invention concerne un dispositif lequel, introduit dans une conduite ou canalisation d'eau, permet d'assurer la fonction de purgeur d'air haut débit tout en assurant la fonction de robinet d'arrêt principal. The present invention relates to a device which, introduced into a pipe or water pipe, makes it possible to perform the function of a high-speed air vent valve while performing the function of a main shut-off valve.
Le dispositif tel que enregistré sous le numéro " INAPI 050048 " réalise pleinement la fonction de purgeur d'air. Cependant, il présente quelques désavantages comme suit : The device as registered under the number "INAPI 050048" fully performs the function of air vent. However, it has some disadvantages as follows:
- Le nombre de pièces élevé nécessaires pour le fabriquer ce qui impacte de façon importante le prix de reviens pour les utilisateurs. - The high number of parts required to manufacture it, which has a significant impact on the cost price for users.
- Lors des essais pour la reproduction des phénomènes physiques réels formés par les éléments suivants : " Réservoir d'eau principale, conduites, purgeur, et passage de l'air", le dispositif tel enregistré sous le numéro " IN API 050048 " réalise pleinement la fonction de purgeur d'air pour laquelle il a été conçu, cependant, lors de l'essai de performance simulant l'arrivé d'une onde de choc pneumatique importante ce qui est très improbable en réel mais qui n'est pas à exclure, le dispositif peut se retrouver dans un état de blocage nécessitant une intervention manuelle pour le débloquer. - During tests for the reproduction of real physical phenomena formed by the following elements: "Main water tank, pipes, trap, and air passage", the device as registered under the number "IN API 050048" fully realizes the air vent function for which it was designed, however, during the performance test simulating the arrival of a large pneumatic shock wave which is very unlikely in real life but which cannot be excluded , the device may end up in a blocked state requiring manual intervention to unblock it.
- La nécessité d'installer deux flotteurs physiquement indépendants pour réaliser la fonction de purgeur d'air, le premier pour obturer ou libéré le passage de l'eau à travers l'orifice de sortie de l'eau et le deuxième pour obturer ou libérer le passage de l'air à travers l'orifice de passage de l'air. - The need to install two physically independent floats to perform the air vent function, the first to block or free the passage of water through the water outlet orifice and the second to block or free the passage of air through the air passage orifice.
- L'ensemble de pièces lesquelles permettent l'évacuation de l'air formé par : "Le flotteur supérieur, la tige du clapet supérieur, le clapet supérieur et le ressort de rappel " nécessitent une inertie consistante pour pouvoir vaincre les forces produites lors du passage de l'air à travers le clapet supérieur pour empêcher sa fermeture intempestive. - L'encombrement des niches réservées à l'installation des compteurs de débit d'eau et particulièrement celles dont les dimensions standards ne sont pas respectés, ne permettent que l'installation d'un robinet d'arrêt principale et le compteur de débit d'eau faut d'encombrement suffisant. - The set of parts which allow the evacuation of the air formed by: "The upper float, the rod of the upper valve, the upper valve and the return spring" require a consistent inertia to be able to overcome the forces produced during the passage of air through the upper flap to prevent it from closing inadvertently. - The size of the niches reserved for the installation of water flow meters and particularly those whose standard dimensions are not respected, only allow the installation of a main shut-off valve and the flow meter. water needs sufficient bulk.
Le nouveau dispositif selon l’invention permet de palier à ces inconvénients.The new device according to the invention overcomes these drawbacks.
Le nouveau dispositif selon l’invention présente un nombre réduit de pièces simplifiant la fabrication et l'assemblage du dispositif en passant de 29 pièces sur l'ancien dispositif à seulement 15 pièces au total sur le nouveau dispositif. The new device according to the invention has a reduced number of parts simplifying the manufacture and assembly of the device by going from 29 parts on the old device to only 15 parts in total on the new device.
Le nouveau dispositif selon l’invention présente l'introduction d'une nouvelle technique permettant de neutraliser l'impact du passage d'ondes de chocs pneumatique tout en éliminant le besoin de faire recoure à l'équilibre inertiel formé par l'ensemble de pièces indiqué au paragraphe précédent comme suit : The new device according to the invention presents the introduction of a new technique making it possible to neutralize the impact of the passage of pneumatic shock waves while eliminating the need to resort to the inertial balance formed by the assembly of parts. indicated in the previous paragraph as follows:
La forme de base du clapet supérieur a été séparé en deux parties "la partie inférieur du clapet et la partie supérieur du clapet" par l'introduction d'un volume intermédiaire. Ce volume permet le passage de l'air à évacuer en premier lieu entre les deux parties du clapet éliminant ainsi son passage à travers la partie inférieur de ce clapet, et en deuxième lieu, l'air circule au-dessus de la tige du clapet pour s'échapper à travers la partie supérieur du clapet. Pendant la période de temps de passage de l'air, des forces Newtoniennes orientées vers le bas apparaissent au- dessus de la tige du clapet. Plus le débit de l'air et sa pression augmentent et plus les forces Newtoniennes forcent le flotteur à obturer la voie d'évacuation de l'eau avec des efforts plus élevés stabilisant ainsi le fonctionnement globale du purgeur et augmentant considérablement ses performances. The basic shape of the upper valve has been separated into two parts "the lower part of the valve and the upper part of the valve" by the introduction of an intermediate volume. This volume allows the passage of the air to be evacuated in the first place between the two parts of the valve, thus eliminating its passage through the lower part of this valve, and secondly, the air circulates above the stem of the valve to escape through the upper part of the valve. During the air passage time period, downward Newtonian forces appear above the valve stem. The more the air flow and its pressure increase, the more the Newtonian forces force the float to close the water evacuation path with higher forces, thus stabilizing the overall operation of the trap and considerably increasing its performance.
A traves l'utilisation de cette nouvelle technique, le ressort de rappel du clapet standard est supprimé et le besoin d'augmenter l'inertie du flotteur lequel est lié à la tige du clapet n'est plus nécessaire. Le nouveau dispositif selon l’invention ne nécessite plus qu'un seul flotteur lequel est raccordé à la tige du clapet supérieur pour former une seule entité qui se déplace ensemble. Lors du passage de l'air, cet ensemble se retrouve en bas obturant ainsi la voie de sortie de l'eau. Lors du passage de l'eau, l'ensemble se déplace ver le haut obturant ainsi le passage de l'air. Through the use of this new technique, the standard valve return spring is eliminated and the need to increase the inertia of the float which is linked to the valve stem is no longer necessary. The new device according to the invention now only requires a single float which is connected to the stem of the upper valve to form a single entity which moves together. During the passage of the air, this assembly is found at the bottom, thus blocking the way out of the water. When the water passes, the assembly moves upwards, thus blocking the passage of air.
Le nouveau dispositif selon l’invention présente un apport majeur par rapport au dispositif tel que celui enregistré sous le numéro " INAPI 050048 " le transformant ainsi en un purgeur à haut débit avec robinet d'arrêt principal. The new device according to the invention presents a major contribution compared to the device such as that registered under the number "INAPI 050048" thus transforming it into a high flow rate trap with main shut-off valve.
Cette nouveauté s'est fait imposer d'elle même du fait de l'encombrement étroit de certaines niches réservées aux compteurs de débit d'eau et de l'encombrement étroit des installations en colonnes montantes des immeubles à étages multiples. De ce fait, l'introduction du nouveau dispositif dans les installations existantes se réalise par la dépose du robinet d'arrêt principal et son remplacement par ce nouveau dispositif qui assure les deux fonctions à la fois, à savoir : Le robinet d'arrêt et le purgeur d'air. This novelty was imposed on its own due to the narrow dimensions of certain niches reserved for water flow meters and the narrow dimensions of installations in risers in multi-storey buildings. Therefore, the introduction of the new device in existing installations is carried out by removing the main stopcock and replacing it with this new device which provides both functions at the same time, namely: The stopcock and the air vent.
Pour augmenter les performances du dispositif, l'orifice d'introduction des fluides " air ou eau" à l'intérieur du purgeur est orienté dans une direction horizontale vers les parois opposé au flotteur. Par conséquent, les perturbations du flotteur par les ondes de pression d'air ainsi que les premiers jets de gouttelettes d'eau sous pressions se voient atténuer considérablement. To increase the performance of the device, the "air or water" fluid introduction orifice inside the trap is oriented in a horizontal direction towards the walls opposite the float. Consequently, the disturbances of the float by the air pressure waves as well as the first jets of water droplets under pressure are considerably reduced.
Les dessins annexés illustrent l’invention : The accompanying drawings illustrate the invention:
La figure 1 représente en coupe, le dispositif de l’invention. Figure 1 shows in section, the device of the invention.
La figure 2 représente en coupe, avec des flèches orientées, le passage de l’air de l’entrée vers la sortie d’évacuation. La figure 3 représente en coupe, avec des flèches orientées et des zones ombrées, le passage de l’eau de l’entrée vers la sortie. Figure 2 shows in section, with oriented arrows, the passage of air from the inlet to the exhaust outlet. Figure 3 shows in section, with oriented arrows and shaded areas, the passage of water from the inlet to the outlet.
La figure 4 (A) représente la vue de face du bloque inférieur du dispositif. Figure 4 (A) shows the front view of the lower block of the device.
La figure 4 (B) représente la vue 3D projeté du bloque inférieur du dispositif. Figure 4 (B) shows the projected 3D view of the lower block of the device.
En référence à ces dessins, le dispositif et composé de deux pièces conteneurs, le bloque inférieur (1) et le bloque supérieur (2) . With reference to these drawings, the device and composed of two container parts, the lower block (1) and the upper block (2).
Lorsque le fluide qui pénètre à travers l’orifice (A) est de l’air, il passe à travers le robinet (3) vers l'intérieur du bloque inférieur (1), il sort à travers l'orifice interne de sortie du fluide (9) puis il est dirigé par le bloque supérieur (2). L'orientation horizontale de l'orifice interne de sortie du fluide (9) permet au flotteur (8) de se maintenir stable lors du passage de l’air et en même temps, l'orifice de sortie (C) est maintenu obturé. Le flotteur (8) est raccordé au clapet supérieur à travers sa tige (6). La force de pesanteur du flotteur (8) et de la tige du clapet supérieur (6) permet l’échappement de l’air à travers l’orifice (B) du dispositif. When the fluid that enters through the orifice (A) is air, it passes through the valve (3) towards the inside of the lower block (1), it exits through the internal outlet orifice of the fluid (9) then it is directed by the upper block (2). The horizontal orientation of the internal fluid outlet orifice (9) allows the float (8) to remain stable during the passage of air and at the same time, the outlet orifice (C) is kept closed. The float (8) is connected to the upper valve through its stem (6). The force of gravity of the float (8) and the stem of the upper valve (6) allows the escape of air through the orifice (B) of the device.
Lorsque le fluide qui pénètre à travers l’orifice (A) est de l’eau, il immerge en premier lieu le flotteur (8) qui se déplace vers le haut ouvrant ainsi la voie à l'eau pour sortir à travers l'orifice (C). La nouvelle position du flotteur (8) obture l'orifice (B) empêchant ainsi l'eau de sortir à travers cet orifice (B). When the fluid that enters through the orifice (A) is water, it first submerges the float (8) which moves upwards thus opening the way for the water to exit through the orifice (VS). The new position of the float (8) closes the orifice (B) thus preventing the water from coming out through this orifice (B).
La pièce (4) représente la partie supérieur du clapet alors que la partie (5) du bloque supérieur représente la partie inférieur du clapet. Ces deux parties sont séparées par le volume (7). Ce dernier permet l'échappement de l'air sans qu'il passe à travers la partie inférieure du clapet immunisant ainsi le dispositif des problèmes de blocage intempestif. Part (4) represents the upper part of the valve while part (5) of the upper block represents the lower part of the valve. These two parts are separated by the volume (7). The latter allows the air to escape without it passing through the lower part of the valve, thus immunizing the device from untimely blocking problems.
Le robinet (3) assure la fonction de robinet d'arrêt principal. The valve (3) performs the function of the main shut-off valve.

Claims

5 5
REVENDICATIONS
1) Dispositif lequel, introduit dans une conduite ou canalisation d'eau, permet d'assurer la fonction de purgeur d'air à haut débit tout en assurant la fonction de robinet d'arrêt principal. 1) Device which, introduced into a pipe or water pipe, makes it possible to ensure the function of a high-flow air vent valve while ensuring the function of a main shut-off valve.
2) Dispositif selon la revendication 1 caractérisé en ce qu’il comporte un clapet supérieur lequel a été séparé en deux parties "la partie inférieur du clapet et la partie supérieur du clapet" par l'introduction d'un volume intermédiaire. Ce volume permet le passage de l'air à évacuer en premier lieu entre les deux parties du clapet éliminant ainsi son passage à travers la partie inférieur de ce clapet, et en deuxième lieu, l'air circule au-dessus de la tige du clapet pour s'échapper à travers la partie supérieur du clapet ce qui stabilise le maintien de la tige du clapet à sa position sans perturbation. 2) Device according to claim 1 characterized in that it comprises an upper valve which has been separated into two parts "the lower part of the valve and the upper part of the valve" by the introduction of an intermediate volume. This volume allows the passage of the air to be evacuated in the first place between the two parts of the valve, thus eliminating its passage through the lower part of this valve, and secondly, the air circulates above the stem of the valve to escape through the upper part of the valve which stabilizes the maintenance of the valve stem in its position without disturbance.
3) Dispositif selon la revendication 1 caractérisé en ce qu’il ne dispose que d'un seul flotteur lequel est raccordé à la tige du clapet supérieur pour former une seule entité qui se déplace ensemble. Lors de l'absence ou le passage de l'air, l'ensemble obture l'orifice de sortie de l'eau. Lors du passage de l'eau, l'ensemble se déplace vers le haut obturant ainsi le l'orifice d'évacuation de l'air. 3) Device according to claim 1 characterized in that it has only one float which is connected to the stem of the upper valve to form a single entity which moves together. In the absence or passage of air, the assembly closes the water outlet orifice. During the passage of water, the assembly moves upwards thus closing the air evacuation orifice.
4) Dispositif selon la revendication 1 caractérisé en ce que pour augmenter les performances du dispositif, l'orifice d'introduction des fluides " air ou eau" à l'intérieur du purgeur est orienté dans une direction horizontale vers les parois opposé au flotteur. Par conséquent, les perturbations du flotteur par les ondes de pression d'air ainsi que les premiers jets de gouttelettes d'eau sous pressions se voient atténuer considérablement. 4) Device according to claim 1 characterized in that to increase the performance of the device, the fluid introduction orifice "air or water" inside the trap is oriented in a horizontal direction towards the walls opposite the float. Consequently, the disturbances of the float by the air pressure waves as well as the first jets of water droplets under pressure are considerably reduced.
PCT/DZ2022/050014 2022-01-02 2022-10-18 High-flow rate air bleed with inbuilt stopcock WO2023126044A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DZ220002 2022-01-02
DZ220002 2022-01-02

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB843329A (en) * 1958-05-03 1960-08-04 Avery Hardoll Ltd Improvements in the separation of gases occluded in liquids
DE2002152A1 (en) * 1970-01-19 1971-07-29 Zulauf & Cie Kg Ball valve with vent valve
JPH02138581A (en) * 1988-11-16 1990-05-28 Kubota Ltd Air valve
KR900010064Y1 (en) * 1988-03-31 1990-10-31 김성수 Water valve
DE29620494U1 (en) * 1996-11-25 1998-03-26 Spanner-Pollux Gmbh, 67063 Ludwigshafen Device for venting drinking water supply lines
WO2000009892A2 (en) * 1998-08-14 2000-02-24 Tura Sergio Air eliminator in hydraulic systems
KR200236049Y1 (en) * 2001-03-29 2001-10-10 부덕실업 주식회사 Exhaust device for pipe arrangement
DE102006015428A1 (en) * 2006-03-31 2007-10-04 Vag-Armaturen Gmbh Aeration and deaeration device for pipeline e.g. for sewerage, has main valve and auxiliary valve, and heading section is arranged in housing for reduction of compressible air volume inside housing
KR101710517B1 (en) * 2015-11-25 2017-03-13 주식회사 조흥밸브앤파이프 Water meter box for preventing vain metering

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB843329A (en) * 1958-05-03 1960-08-04 Avery Hardoll Ltd Improvements in the separation of gases occluded in liquids
DE2002152A1 (en) * 1970-01-19 1971-07-29 Zulauf & Cie Kg Ball valve with vent valve
KR900010064Y1 (en) * 1988-03-31 1990-10-31 김성수 Water valve
JPH02138581A (en) * 1988-11-16 1990-05-28 Kubota Ltd Air valve
DE29620494U1 (en) * 1996-11-25 1998-03-26 Spanner-Pollux Gmbh, 67063 Ludwigshafen Device for venting drinking water supply lines
WO2000009892A2 (en) * 1998-08-14 2000-02-24 Tura Sergio Air eliminator in hydraulic systems
KR200236049Y1 (en) * 2001-03-29 2001-10-10 부덕실업 주식회사 Exhaust device for pipe arrangement
DE102006015428A1 (en) * 2006-03-31 2007-10-04 Vag-Armaturen Gmbh Aeration and deaeration device for pipeline e.g. for sewerage, has main valve and auxiliary valve, and heading section is arranged in housing for reduction of compressible air volume inside housing
KR101710517B1 (en) * 2015-11-25 2017-03-13 주식회사 조흥밸브앤파이프 Water meter box for preventing vain metering

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