Abrégé

A valve assembly for controlling a fluid, of the present invention, comprises: a high-pressure container for storing hydrogen gas; a first flow path that is connected to a charging part for hydrogen gas, and a gas using part, so that the hydrogen gas for charge and use, passes through one flow path; a second flow path that is connected between the high-pressure container and the first flow path; a third flow path that is connected between the high-pressure container and the first flow path; a manual valve that is mounted on the first flow path to manually open and close the first flow path; a solenoid valve that is mounted on the third flow path to open and close the third flow path; a fourth flow path that is connected between the high-pressure container and the first flow path; and a bleed valve that is mounted on the fourth flow path and opens and closes the fourth flow path to discharge the hydrogen gas inside the high-pressure container through the first flow path.

Classes IPC  ?

• F17C 13/04 - Disposition ou montage des soupapes
• F17C 5/06 - Procédés ou appareils pour remplir des récipients sous pression de gaz liquéfiés, solidifiés ou comprimés pour le remplissage avec des gaz comprimés
• F17C 13/08 - Dispositions de montage des récipients

Abrégé

A pressure relief device for a high-pressure vessel comprises: a cap member having a space part formed therein; and a piston member having a first chamber part, and dividing the space part of the cap member into a second chamber part and a third chamber part, and thus, when fusible alloy is molten, the molten fusible alloy sequentially flows into the first chamber part and the second chamber part so that leakage of the molten fusible alloy to the outside can be prevented.

Classes IPC  ?

• F17C 13/04 - Disposition ou montage des soupapes
• F16K 17/38 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fonctionnant sous l'action de circonstances extérieures, p. ex. un choc, un changement de position d'une température excessive
• F17C 13/12 - Aménagements ou montage de dispositifs pour prévenir ou atténuer les effets d'explosion
• F17C 13/06 - Fermetures, p. ex. couvercles, organes frangibles

Abrégé

A pressure relief device for a high-pressure vessel includes: a first body part which is coupled to a valve body mounted on a high-pressure vessel, and which has a gas passage and a space part formed therein, the gas passage having a gas of the high-pressure vessel entering therein, and the space part communicating with the gas passage; a second body part which is mounted in the space part of the first body part, and has a gas outlet and a chamber formed therein, the gas outlet discharging, to the outside, the gas that has entered into the space part, and the chamber communicating with the space part; a piston member which is mounted in the chamber so as to be linearly moveable so as to open/close the gas passage; a spring arranged between the space part and the piston member so as to provide an elastic force in the backward-moving direction of the piston member; and a fusible alloy which is mounted in the chamber in a position at the rear of the piston member, and melts when the surrounding temperature reaches a predetermined temperature or higher, wherein, when the fusible alloy melts and is thus discharged to the outside of the chamber, the piston member moves backwards, thereby opening the gas passage, and thus the gas may be rapidly discharged, and reliability may be increased.

Classes IPC  ?

• F17C 13/04 - Disposition ou montage des soupapes
• F17C 13/12 - Aménagements ou montage de dispositifs pour prévenir ou atténuer les effets d'explosion

Abrégé

Provided is a valve assembly for a gas vessel including: a valve body mounted at an inlet of the gas vessel and connected to a gas supply source; a connection part connected to the gas supply source on a side surface of the valve body; a check valve mounted on the connection part; and a safety valve mounted on the side surface of the valve body to discharge a fuel gas in the gas vessel to the outside when a gas pressure inside the gas vessel increases above a certain pressure or higher. The valve assembly for a gas vessel is connected to the lower end of the valve body and arranged in the gas vessel to block the gas passage when the fuel gas introduced through the valve body is charged to a set value to prevent overcharging of the fuel gas.

Classes IPC  ?

• F16K 31/24 - Moyens de fonctionnementDispositifs de retour à la position de repos actionnés par un fluide et actionnés par un flotteur commandant une soupape de levage par l'intermédiaire d'une transmission dont l'enchaînement des pièces relie un seul flotteur à une seule soupape
• F16K 15/18 - Soupapes, clapets ou valves de retenue à mécanisme de commandeSoupape de retenue et soupape à mécanisme de commande combinées
• F16K 31/26 - Moyens de fonctionnementDispositifs de retour à la position de repos actionnés par un fluide et actionnés par un flotteur commandant une soupape de levage par l'intermédiaire d'une transmission dont l'enchaînement des pièces relie un seul flotteur à une seule soupape la soupape obéissant à un mouvement rectiligne et le flotteur étant monté sur un bras articulé à pivot

Abrégé

This hydrogen fuel container assembly can be applied to various types of modes of transport by comprising: a plurality of hydrogen fuel containers filled with hydrogen fuel; a container tray on which the plurality of hydrogen fuel containers are arranged and mounted in a line; connection plugs which are mounted on first entrance portions formed at the front parts of the plurality of hydrogen fuel containers, and through which the hydrogen fuel goes in and out; a connection line connecting the connection plugs so that the hydrogen fuel passes therethrough; and a control valve, which is connected to the connection line, supplies, to a use part, the hydrogen fuel stored in the hydrogen fuel containers, and controls the flow of the hydrogen fuel when filling the containers with the hydrogen fuel.

Classes IPC  ?

• F17C 13/08 - Dispositions de montage des récipients
• F17C 13/04 - Disposition ou montage des soupapes
• F17C 13/06 - Fermetures, p. ex. couvercles, organes frangibles
• F17C 13/02 - Adaptations spéciales des dispositifs indicateurs, de mesure ou de contrôle

Abrégé

A solenoid valve for a high-pressure container of the present invention comprises: a body portion; a valve seat which is installed on the lower portion of the body portion and has a discharge port through which a raw material gas is discharged; a coil to which electric power is applied; a core installed on the inner surface of the body portion; a lower plunger; an upper plunger; an operating rod arranged in the upper plunger; a spring arranged between the core and the operating rod; and a ball member of a spherical shape which is in contact with the lower surface of the operating rod and is seated on a seating portion formed on the lower side of the upper plunger to open/close an orifice. Thus, the hermetic state can be maintained at low pressure, and leakage in the low-pressure state can be prevented.

Classes IPC  ?

• F17C 13/04 - Disposition ou montage des soupapes
• F16K 15/04 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés en forme de sphère
• F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant

Abrégé

The present invention comprises: a first stepped part formed, in the perpendicular direction with respect to the insertion direction of a component unit, in a component mounting part of a valve body; a second stepped part formed at the outer surface of the component unit so as to face the first stepped part; and an airtight unit disposed between the second stepped part and the second stepped part so as to maintain airtightness between the valve body and the component unit. The airtight unit includes: a lower protrusion part protruding from the upper surface of the first stepped part in a shape in which the tip portion thereof is pointed; an upper protrusion part protruding from the lower surface of the second stepped part in a shape in which the tip portion thereof is pointed; and a sealing member, which is inserted and disposed between the first stepped part and the second stepped part and into which the lower protrusion part and the upper protrusion part penetrate, and thus airtightness is improved.

Classes IPC  ?

• F17C 13/04 - Disposition ou montage des soupapes
• F16K 1/46 - Fixation des segments d'étanchéité
• F16K 25/00 - Détails constitutifs relatifs au contact entre corps de soupapes ou de clapets et leurs sièges

Abrégé

A pressure relief device for a high-pressure vessel, of the present invention, comprises: a cap member having a space part formed therein; and a piston member having a first chamber part, and dividing the space part of the cap member into a second chamber part and a third chamber part, and thus, when fusible alloy is molten, the molten fusible alloy sequentially flows into the first chamber part and the second chamber part so that leakage of the molten fusible alloy to the outside can be prevented.

Classes IPC  ?

• F17C 13/12 - Aménagements ou montage de dispositifs pour prévenir ou atténuer les effets d'explosion
• F17C 13/04 - Disposition ou montage des soupapes
• F17C 13/06 - Fermetures, p. ex. couvercles, organes frangibles
• F16K 31/00 - Moyens de fonctionnementDispositifs de retour à la position de repos

Abrégé

A pressure relief device for a high-pressure vessel of the present invention comprises: a first body part which is coupled to a valve body mounted on a high-pressure vessel, and which has a gas passage and a space part formed, the gas passage having a gas of the high-pressure vessel entering therein, and the space part communicating with the gas passage; a second body which is mounted in the space part of the first body part, and has a gas outlet and a chamber formed, the gas outlet discharging, to the outside, the gas that has entered into the space part, and the chamber communicating with the space part; a piston member which is mounted in the chamber so as to be linearly moveable so as to open/close the gas passage; a spring disposed between the space part and the piston member so as to provide an elastic force in the backward-moving direction of the piston member; and a fusible alloy which is mounted in the chamber in a position at the rear of the piston member, and melts when the surrounding temperature reaches a predetermined temperature or higher, wherein, when the fusible alloy melts and is thus discharged to the outside of the chamber, the piston member moves backwards, thereby opening the gas passage, and thus the gas may be rapidly discharged, and reliability may be increased.

Classes IPC  ?

• F17C 13/12 - Aménagements ou montage de dispositifs pour prévenir ou atténuer les effets d'explosion
• F17C 13/04 - Disposition ou montage des soupapes
• F16K 17/00 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage

Abrégé

A pressure relief device for a high-pressure vessel of the present invention divides the inside of a chamber into a first chamber and a second chamber, includes a gap portion formed between a piston member for opening and closing an outlet and the inner surface of the chamber to maintain the internal pressure of the first chamber and the second chamber at the same pressure, wherein when a fusible alloy is melted and a gas outlet is opened, a pressure difference is generated between the first chamber and the second chamber, and the piston is retracted and the outlet is opened to release the pressure of the high-pressure vessel, thereby preventing explosion of the high-pressure vessel.

Classes IPC  ?

• F17C 13/12 - Aménagements ou montage de dispositifs pour prévenir ou atténuer les effets d'explosion
• F17C 13/04 - Disposition ou montage des soupapes
• F16K 17/00 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage

Abrégé

A solenoid valve for a high-pressure container of the present invention comprises: a body portion; a valve seat which is installed on the lower portion of the body portion and has a discharge port through which a raw material gas is discharged; a coil to which electric power is applied; a core installed on the inner surface of the body portion; a lower plunger; an upper plunger; an operating rod arranged in the upper plunger; a spring arranged between the core and the operating rod; and a ball member of a spherical shape which is in contact with the lower surface of the operating rod and is seated on a seating portion formed on the lower side of the upper plunger to open/close an orifice. Thus, the hermetic state can be maintained at low pressure, and leakage in the low-pressure state can be prevented.

Classes IPC  ?

• F17C 13/04 - Disposition ou montage des soupapes
• F17C 13/12 - Aménagements ou montage de dispositifs pour prévenir ou atténuer les effets d'explosion
• F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
• F16K 15/04 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés en forme de sphère

Abrégé

A fluid-controlling valve having a decompression function of the present invention comprises: a valve body mounted to a high-pressure container and having a plurality of flow paths formed therein, through which a source gas passes; a manual valve which is mounted to the valve body and manually opens and closes a first flow path connected to the high-pressure container; a solenoid valve which is connected to the manual valve through a second flow path and a third flow path and automatically opens and closes flow paths according to an electric signal; a check valve which is installed at a flow path for filling the high-pressure container with a source gas, to open a flow of one direction while blocking a flow of the opposite direction; a first decompression unit which is connected to the solenoid valve through a fourth flow path to primarily decompress a source gas; and a second decompression unit which is connected to the first decompression unit through a connection flow path to secondarily decompress the primarily decompressed source gas and supply same to a source-using part. Therefore, the fluid-controlling valve can simultaneously function to control filling or releasing of a source gas and decompress the source gas to the working pressure.

Classes IPC  ?

• F16K 17/02 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage ouvrant sur excès de pression d'un côtéSoupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté
• F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
• F16K 31/14 - Moyens de fonctionnementDispositifs de retour à la position de repos actionnés par un fluide montés sur soupapes à fonctionnement manuel ou conjugués avec celles-ci
• F16K 17/00 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage
• F16K 35/00 - Dispositions empêchant la mise en action accidentelle ou non autorisée
• F16K 15/04 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés en forme de sphère
• F16K 27/00 - Structures des logementsMatériaux utilisés à cet effet
• F16K 27/12 - Couvercles de logements

Abrégé

A valve for high-pressure containers of the present invention comprises: a valve body which is mounted to an inlet of a high-pressure container filled with a source gas, and has a flow path through which the source gas passes; a manual valve which is mounted to the valve body and manually opens and closes the flow path; a source gas filling part which is mounted to a side surface of the valve body and fills a high-pressure source gas into the high-pressure container; and a decompressing part which is mounted to the upper surface of the valve body and connected to a gas utilization part to decompress the source gas stored in the high-pressure container to the utilization pressure of the gas utilization part. The function of filling the source gas into the valve mounted to the high-pressure container, the function of opening and closing the flow path, and the decompressing function are integrated in the valve for high-pressure containers, thus rendering a separate decompression valve unnecessary and enabling the configuration thereof to be simplified.

Classes IPC  ?

• F17C 13/04 - Disposition ou montage des soupapes
• F17C 5/00 - Procédés ou appareils pour remplir des récipients sous pression de gaz liquéfiés, solidifiés ou comprimés
• F16K 17/04 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage ouvrant sur excès de pression d'un côtéSoupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté actionnés par ressort
• F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
• F16K 27/02 - Structures des logementsMatériaux utilisés à cet effet des soupapes de levage

Abrégé

Provided is a fluid control solenoid valve including: a valve body; a valve seat mounted on a lower portion thereof; a coil mounted on an outer circumferential surface thereof and to which power is applied; a core mounted on an inner surface thereof; a lower plunger movably disposed on the inner surface thereof and formed with an orifice and integrally formed with a tight contact portion to be in tight contact with the valve seat on a bottom surface thereof; and an actuating unit arranged to be linearly moved on an upper side of the lower plunger, actuated by interlocking the lower plunger and formed with an actuating rod which is linearly moved and which is in close contact with the orifice. A fluid flow delay unit is provided on an outer surface of the lower plunger to generate pressure difference between upper and lower portions of the lower plunger.

Classes IPC  ?

• F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
• F16K 31/10 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant avec mécanisme additionnel entre l'armature et l'élément de fermeture
• F16K 31/40 - Moyens de fonctionnementDispositifs de retour à la position de repos actionnés par un fluide et dans lesquels il y a alimentation constante du moteur à fluide par le fluide provenant de la canalisation avec un organe actionné électriquement dans la décharge du moteur
• F16K 39/02 - Dispositifs pour relâcher la pression sur les faces d'un joint d'étanchéité dans le cas de soupapes de levage
• F17C 13/04 - Disposition ou montage des soupapes
• F16K 1/36 - Corps de soupapes

Abrégé

A solenoid valve for controlling fluid, of the present invention, comprises: a valve body; a valve seat mounted at a lower part of the valve body; coils mounted along an outer peripheral surface of the valve body such that power is applied thereto; a core mounted on an inner surface of the valve body; a lower plunger movably disposed at an inner surface of the valve body, having an orifice, and having a contact part, which is integrally formed on a lower surface thereof and comes into close contact with the valve seat; and an operating unit disposed at an upper side of the lower plunger so as to be linearly movable, operating by interlocking with the lower plunger, linearly moving when the power is applied to the coils, and having an operating rod coming into close contact with the orifice, wherein a fluid flow delaying part for delaying the flow of fluid moving through a gap between the valve body and the lower plunger, so as to generate a pressure difference between upper and lower parts of the lower plunger, is provided on an outer surface of the lower plunger so as to generate the pressure difference between the upper and lower parts of the lower plunger, such that the lower plunger is lifted, thereby enabling the valve to be smoothly operated.

Classes IPC  ?

• F17C 13/04 - Disposition ou montage des soupapes
• F16K 1/36 - Corps de soupapes
• F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
• F16K 27/02 - Structures des logementsMatériaux utilisés à cet effet des soupapes de levage

Abrégé

Provided is a fluid control valve assembly including: a main valve body having a first flow passage that is mounted on an inlet of a high-pressure vessel and through which a charging source gas passes, a second flow passage through which a feeding source gas passes, and a third flow passage to which the first flow passage and the second flow passage are connected; a manual valve that is mounted on the main valve body and that opens and closes the third flow passage; a solenoid valve that is mounted on the main valve body and that opens and closes the second flow passage by an electrical signal; a first check valve that is provided on the first flow passage to thus block a reverse flow of the charging source gas; and a second check valve that is provided on the second flow passage to thus block a reverse flow of the feeding source gas, and block the charging source gas from flowing in the second flow passage, to thereby prevent the charging source gas from flowing in the solenoid valve. Accordingly, a charging gas pressure of a high-pressure is prevented from being applied to a solenoid valve, to thereby prevent damage to the solenoid valve and to prevent a malfunction of the solenoid valve.

Classes IPC  ?

• F17C 13/04 - Disposition ou montage des soupapes
• H01M 8/04089 - Dispositions pour la commande des paramètres des réactifs, p. ex. de la pression ou de la concentration des réactifs gazeux

Abrégé

A fluid control valve assembly of the present invention comprises: a main valve body having a first flow path which is provided at an inlet of a high-pressure container and passes a filling source gas, a second flow path which passes a supplying source gas, and a third flow path for connecting the first flow path with the second flow path; a manual valve which is provided on the main valve body to open/close the third flow path; a solenoid valve which is provided on the main valve body, and which opens/closes the second flow path according to an electric signal; a first check valve provided at the first flow path to block the back flow of the filling source gas; and a second check valve which is provided at the second flow path to block the back flow of the supplying source gas, and which prevents the inflow of the filling source gas into the solenoid valve by blocking the filling source gas from flowing into the second flow path, and thus the present invention can prevent damage to and malfunction of the solenoid valve by blocking high filling pressure from being applied to the solenoid valve.

Classes IPC  ?

• F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
• F16K 31/12 - Moyens de fonctionnementDispositifs de retour à la position de repos actionnés par un fluide
• F16K 51/00 - Autres détails non particuliers aux types de soupapes ou clapets ou autres appareils d'obturation
• F16K 37/00 - Moyens particuliers portés par ou sur les soupapes ou autres dispositifs d'obturation pour repérer ou enregistrer leur fonctionnement ou pour permettre de donner l'alarme

Produits et services

MANUALLY OPERATED METAL CYLINDER VALVES FOR GASES

Abrégé

Provided is a valve assembly for controlling a fluid. The valve assembly includes: a high-pressure container for storing hydrogen gas; a first flow path that is connected to a charging unit for charging a hydrogen gas, and a gas consuming unit, so that the hydrogen gas for charge and use, passes through one flow path; a second flow path that is connected between the high-pressure container and the first flow path; a third flow path that is connected between the high-pressure container and the first flow path; a manual valve that is mounted on the first flow path to manually open and close the first flow path; a solenoid valve that is mounted on the third flow path to open and close the third flow path; a fourth flow path that is connected between the high-pressure container and the first flow path; and a bleed valve that is mounted on the fourth flow path and opens and closes the fourth flow path to discharge the hydrogen gas inside the high-pressure container through the first flow path.

Classes IPC  ?

• F17C 5/06 - Procédés ou appareils pour remplir des récipients sous pression de gaz liquéfiés, solidifiés ou comprimés pour le remplissage avec des gaz comprimés
• F17C 13/04 - Disposition ou montage des soupapes
• F17C 13/08 - Dispositions de montage des récipients

Abrégé

A fluid control valve assembly of the present invention comprises: a main valve body having a first flow path which is provided at an inlet of a high-pressure container and passes a filling source gas, a second flow path which passes a supplying source gas, and a third flow path for connecting the first flow path with the second flow path; a manual valve which is provided on the main valve body to open/close the third flow path; a solenoid valve which is provided on the main valve body, and which opens/closes the second flow path according to an electric signal; a first check valve provided at the first flow path to block the back flow of the filling source gas; and a second check valve which is provided at the second flow path to block the back flow of the supplying source gas, and which prevents the inflow of the filling source gas into the solenoid valve by blocking the filling source gas from flowing into the second flow path, and thus the present invention can prevent damage to and malfunction of the solenoid valve by blocking high filling pressure from being applied to the solenoid valve.

Classes IPC  ?

• F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
• F16K 31/12 - Moyens de fonctionnementDispositifs de retour à la position de repos actionnés par un fluide
• F16K 37/00 - Moyens particuliers portés par ou sur les soupapes ou autres dispositifs d'obturation pour repérer ou enregistrer leur fonctionnement ou pour permettre de donner l'alarme
• F16K 51/00 - Autres détails non particuliers aux types de soupapes ou clapets ou autres appareils d'obturation

Abrégé

A fluid control solenoid valve includes a valve body; valve seat; coil on an
outer
circumferential surface of the valve body; core; lower plunger movably
disposed on the inner
surface of the valve body and formed with an orifice; and actuating unit
arranged to be linearly
moved on an upper side of the lower plunger, actuated by interlocking the
lower plunger and
formed with an actuating rod linearly moved and in close contact with the
orifice when power is
applied to the coil. A fluid flow delay unit is provided on an outer surface
of the lower plunger
for delaying flow of fluid through a gap between the valve body and the lower
plunger to
generate a pressure difference between upper and lower portions of the lower
plunger to raise the
lower plunger to perform a smooth operation of the solenoid valve.

Classes IPC  ?

• F16K 1/36 - Corps de soupapes
• F16K 27/02 - Structures des logementsMatériaux utilisés à cet effet des soupapes de levage
• F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
• F17C 13/04 - Disposition ou montage des soupapes

Abrégé

Provided is a valve assembly for a gas vessel including: a valve body mounted at an inlet of the gas vessel and connected to a gas supply source; a connection part connected to the gas supply source on a side surface of the valve body; a check valve mounted on the connection part; and a safety valve mounted on the side surface of the valve body to discharge a fuel gas in the gas vessel to the outside when a gas pressure inside the gas vessel increases above a certain pressure or higher, wherein the valve assembly for a gas vessel is connected to the lower end of the valve body and arranged in the gas vessel to block the gas passage when the fuel gas introduced through the valve body is charged to a set value to prevent overcharging of the fuel gas.

Classes IPC  ?

• F16K 17/04 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage ouvrant sur excès de pression d'un côtéSoupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté actionnés par ressort
• F17C 13/04 - Disposition ou montage des soupapes