WO2009010177A1 - Safety valve for releasing gas in overpressure, particularly for lpg vehicles propulsion apparatus - Google Patents

Safety valve for releasing gas in overpressure, particularly for lpg vehicles propulsion apparatus Download PDF

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Publication number
WO2009010177A1
WO2009010177A1 PCT/EP2008/005272 EP2008005272W WO2009010177A1 WO 2009010177 A1 WO2009010177 A1 WO 2009010177A1 EP 2008005272 W EP2008005272 W EP 2008005272W WO 2009010177 A1 WO2009010177 A1 WO 2009010177A1
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WO
WIPO (PCT)
Prior art keywords
safety valve
cylindrical chamber
elastic member
gas
valve according
Prior art date
Application number
PCT/EP2008/005272
Other languages
French (fr)
Inventor
Achille Tomasetto
Original Assignee
Tomasetto Achille S.P.A.
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 Tomasetto Achille S.P.A. filed Critical Tomasetto Achille S.P.A.
Publication of WO2009010177A1 publication Critical patent/WO2009010177A1/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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
    • F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded

Definitions

  • the present invention relates to a safety valve for releasing gas in overpressure, particularly for LPG vehicles propulsion apparatus.
  • a safety valve for releasing gas in overpressure particularly for LPG vehicles propulsion apparatus.
  • suitable safety devices have been devised which, in emergency conditions, such as a sudden increase in the internal pressure of the tank due to a fire, are capable of evacuating a large quantity of gas in a very short time.
  • the simplest safety device substantially consists of a spring-loaded valve, which is integrated in the multipurpose valve and is constituted by a chamber which is connected to the outside environment and to the inside of the tank and by a flow control element which is pushed by a spring.
  • the gas is evacuated both through the spring-loaded valve and through the duct freed by the fusible element, which melts when a temperature of approximately 120 0 C is reached.
  • Italian Patent No. 1315175 discloses a safety device constituted by a double spring- loaded valve which is integrated in the multipurpose valve.
  • the valve is constituted by a chamber which is closed by a fusible plug and is connected both to the outside environment and to the inside of the tank.
  • the valve also comprises a flow control element which is pushed by a first spring arranged inside the chamber and by a second spring located within the tank. In normal pressure conditions the flow control element closes the opening connecting the inside of the tank and the outside environment under the thrust of both springs, while in case of fire the fusible plug melts, releasing the first spring, and the gas in overpressure moves the flow control element, overcoming the action of the second spring, and evacuates externally.
  • Italian Patent No. 1315578 discloses a safety device constituted by another type of spring-loaded valve integrated in the multipurpose valve.
  • Such valve is constituted by a chamber which is connected to the outside environment and to the inside of the tank, by a flow control element, which is pushed by a spring located inside the chamber, and by a fusible insert, which is inserted in the side walls of the chamber.
  • the flow control element closes the opening connecting the inside of the tank and the outside environment by way of the thrust of the spring; vice versa, in case of fire, the gas in overpressure evacuates externally both through the hole released by the melting of the fusible insert and by moving the flow control element after overcoming the action of the spring.
  • the above described device with the double spring-loaded valve necessarily entails the use of two springs and requires the installation of one of the two springs inside the tank, while the other devices, constituted by the single spring-loaded valve and by a separate fusible insert, appear particularly complicated to manufacture.
  • the aim of the present invention is to overcome the drawbacks of the cited prior art by, providing a safety valve which, in overpressure conditions, is capable of evacuating from a tank a large amount of gas in a very short time.
  • an object of the invention is to provide a safety valve which integrates, in a single structure, a fusible device and a spring-loaded valve, reducing space occupation and difficulties in production.
  • Another object of the invention is to provide a safety valve which can be integrated in a multipurpose valve.
  • a safety valve for releasing gas in overpressure comprising a cylindrical chamber provided with a plurality of lateral holes and with at least one opening which is provided on the bottom of said cylindrical chamber in order to be connected to the inside of a tank which contains said gas, said cylindrical chamber accommodating a flow control means which is kept in abutment against said opening by an elastic member, characterized that it comprises at least one fusible device which is joined to the top of said cylindrical chamber in order to keep said elastic member compressed and contrast the thrust of said gas exclusively in normal pressure and temperature conditions.
  • Figure 1 is an exploded sectional view of a safety valve according to the invention
  • Figure 2 is a sectional view of the safety valve according to the invention, in normal pressure and temperature conditions
  • Figure 3 is a sectional view of the safety valve according to the invention in case of fire.
  • the safety valve generally designated by the reference numeral 1 , comprises a cylindrical chamber 2, provided with lateral holes 3 which are connected to the outside environment, and with an opening 4 provided on the bottom of the cylindrical chamber 2 so as to be connected to the inside of a multipurpose valve 60, of which the safety valve 1 is an integral part.
  • the multipurpose valve 60 is connected to the inside of a tank, not shown in the figures, in which the gas 70 is stored.
  • a flow control means 5 is accommodated within the cylindrical chamber 2 and is kept in abutment to the opening 4 by an elastic member in order to prevent the exit of the gas 70 from the multipurpose valve 60 when in normal pressure and temperature conditions.
  • the elastic member is preferably constituted by a spring 6.
  • the flow control means 5 comprises a bush 7 which has a square cross-section, provided with a sealing member which is preferably constituted by a pad of elastomer 8, and is provided with a receptacle
  • the safety valve 1 comprises a fusible device which is joined to the top of the cylindrical chamber 2 so as to keep the spring 6 compressed and contrast the thrust of the gas 70 only in normal pressure and temperature conditions.
  • the fusible device is constituted by a cylinder 10 made of a low-melting alloy, which is accommodated within an adjustment screw 11 which is associated with the top of the cylindrical chamber 2 so as to allow to adjust the compression of the spring 6.
  • a plurality of through holes 13 are provided at the head of the adjustment screw 11 ; such through holes 13 allow the metal disk 12 and the spring 6 to extrude the cylinder 10 made of low-melting alloy if it melts due to an increase in temperature. Operation of the safety valve according to the invention is as follows. In normal pressure and temperature conditions, the flow control means 5 prevents the gas 70 from escaping from the multipurpose valve 60 through the opening 4, by virtue of the force applied by the spring 6.
  • the flow control means 5 rises and frees the opening 4, allowing the gas 70 to exit from the multipurpose valve 60 and to disperse into the outside environment, passing laterally with respect to the bush 7 and flowing out through the lateral holes 3.
  • the safety valve according to the invention fully achieves the intended aim, since in overpressure conditions it is able to evacuate a large quantity of gas from a tank, in a very short time, in compliance with current regulatory requirements.
  • the safety valve according to the invention can be an integral part of a multipurpose valve, and is simple to manufacture and quick to install.
  • the present valve is capable of integrating a fusible device and a spring-loaded valve, reducing space occupations and difficulties in production.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

A safety valve (1), particularly for releasing gas in overpressure, which includes a cylindrical chamber (2) provided with a plurality of lateral holes (3) and with an opening (4) which is provided on the bottom and connects it to the inside of a tank which contains gas; the cylindrical chamber (2) accommodates a flow control means (5) which is biased in abutment against the opening (4) by a spring (6). A fusible device (10) is joined to the top of the cylindrical chamber (2) in order to keep the spring (6) compressed and contrast the thrust of the gas exclusively in normal pressure and temperature conditions.

Description

SAFETY VALVE FOR RELEASING GAS IN OVERPRESSURE, PARTICULARLY FOR LPG VEHICLES PROPULSION APPARATUS
The present invention relates to a safety valve for releasing gas in overpressure, particularly for LPG vehicles propulsion apparatus. As is known, in order to avoid the danger of explosion of the LPG tanks equipping motor vehicles, suitable safety devices have been devised which, in emergency conditions, such as a sudden increase in the internal pressure of the tank due to a fire, are capable of evacuating a large quantity of gas in a very short time.
The simplest safety device substantially consists of a spring-loaded valve, which is integrated in the multipurpose valve and is constituted by a chamber which is connected to the outside environment and to the inside of the tank and by a flow control element which is pushed by a spring.
While in normal pressure conditions the flow control element closes the connection between the inside of the tank and the outside environment, in case of overpressure the gas overcomes the action of the spring, moving the shutter so as to free the opening and evacuate externally.
Other conventional devices include a spring-loaded valve, of the type described above, and a fusible element which is inserted within the body of the multipurpose valve, so as to close the connection between the inside of the tank and the outside environment.
In case of overpressure caused by a fire, the gas is evacuated both through the spring-loaded valve and through the duct freed by the fusible element, which melts when a temperature of approximately 1200C is reached.
Italian Patent No. 1315175 discloses a safety device constituted by a double spring- loaded valve which is integrated in the multipurpose valve. The valve is constituted by a chamber which is closed by a fusible plug and is connected both to the outside environment and to the inside of the tank. The valve also comprises a flow control element which is pushed by a first spring arranged inside the chamber and by a second spring located within the tank. In normal pressure conditions the flow control element closes the opening connecting the inside of the tank and the outside environment under the thrust of both springs, while in case of fire the fusible plug melts, releasing the first spring, and the gas in overpressure moves the flow control element, overcoming the action of the second spring, and evacuates externally.
Italian Patent No. 1315578, discloses a safety device constituted by another type of spring-loaded valve integrated in the multipurpose valve. Such valve is constituted by a chamber which is connected to the outside environment and to the inside of the tank, by a flow control element, which is pushed by a spring located inside the chamber, and by a fusible insert, which is inserted in the side walls of the chamber. In normal pressure conditions, the flow control element closes the opening connecting the inside of the tank and the outside environment by way of the thrust of the spring; vice versa, in case of fire, the gas in overpressure evacuates externally both through the hole released by the melting of the fusible insert and by moving the flow control element after overcoming the action of the spring.
Although the above described devices are able to ensure the required safety conditions, they are not optimized from the structural standpoint and are therefore bulky and scarcely advantageous from a merely economical standpoint.
The above described device with the double spring-loaded valve necessarily entails the use of two springs and requires the installation of one of the two springs inside the tank, while the other devices, constituted by the single spring-loaded valve and by a separate fusible insert, appear particularly complicated to manufacture.
The aim of the present invention is to overcome the drawbacks of the cited prior art by, providing a safety valve which, in overpressure conditions, is capable of evacuating from a tank a large amount of gas in a very short time.
Within this aim, an object of the invention is to provide a safety valve which integrates, in a single structure, a fusible device and a spring-loaded valve, reducing space occupation and difficulties in production.
Another object of the invention is to provide a safety valve which can be integrated in a multipurpose valve.
Another object of the invention is to provide a safety valve which is suitable for current regulatory requirements. Another object of the invention is to provide a safety valve which is simple to provide, quick to install, and is advantageous from a merely economical standpoint.
This aim and these and other objects, which will become better apparent hereinafter, are achieved by a safety valve for releasing gas in overpressure, comprising a cylindrical chamber provided with a plurality of lateral holes and with at least one opening which is provided on the bottom of said cylindrical chamber in order to be connected to the inside of a tank which contains said gas, said cylindrical chamber accommodating a flow control means which is kept in abutment against said opening by an elastic member, characterized that it comprises at least one fusible device which is joined to the top of said cylindrical chamber in order to keep said elastic member compressed and contrast the thrust of said gas exclusively in normal pressure and temperature conditions.
Further characteristics and advantages will become better apparent from the description of a preferred but not exclusive embodiment of a safety valve according to the invention, illustrated by way of non-limiting example in the accompanying drawings, wherein:
Figure 1 is an exploded sectional view of a safety valve according to the invention; Figure 2 is a sectional view of the safety valve according to the invention, in normal pressure and temperature conditions;
Figure 3 is a sectional view of the safety valve according to the invention in case of fire.
With reference to the figures, the safety valve, generally designated by the reference numeral 1 , comprises a cylindrical chamber 2, provided with lateral holes 3 which are connected to the outside environment, and with an opening 4 provided on the bottom of the cylindrical chamber 2 so as to be connected to the inside of a multipurpose valve 60, of which the safety valve 1 is an integral part.
The multipurpose valve 60 is connected to the inside of a tank, not shown in the figures, in which the gas 70 is stored.
A flow control means 5 is accommodated within the cylindrical chamber 2 and is kept in abutment to the opening 4 by an elastic member in order to prevent the exit of the gas 70 from the multipurpose valve 60 when in normal pressure and temperature conditions. The elastic member is preferably constituted by a spring 6. The flow control means 5 comprises a bush 7 which has a square cross-section, provided with a sealing member which is preferably constituted by a pad of elastomer 8, and is provided with a receptacle
9 which is suitable to accommodate the spring 6. According to the invention, the safety valve 1 comprises a fusible device which is joined to the top of the cylindrical chamber 2 so as to keep the spring 6 compressed and contrast the thrust of the gas 70 only in normal pressure and temperature conditions.
In practice, the fusible device is constituted by a cylinder 10 made of a low-melting alloy, which is accommodated within an adjustment screw 11 which is associated with the top of the cylindrical chamber 2 so as to allow to adjust the compression of the spring 6.
The direct contact between the cylinder 10, made of low-melting alloy, and the spring 6 is prevented by a metal disk 12 which is interposed between them.
A plurality of through holes 13 are provided at the head of the adjustment screw 11 ; such through holes 13 allow the metal disk 12 and the spring 6 to extrude the cylinder 10 made of low-melting alloy if it melts due to an increase in temperature. Operation of the safety valve according to the invention is as follows. In normal pressure and temperature conditions, the flow control means 5 prevents the gas 70 from escaping from the multipurpose valve 60 through the opening 4, by virtue of the force applied by the spring 6.
If the pressure of the gas 70 increases until the level preset by regulatory requirements is reached, the flow control means 5 rises and frees the opening 4, allowing the gas 70 to exit from the multipurpose valve 60 and to disperse into the outside environment, passing laterally with respect to the bush 7 and flowing out through the lateral holes 3.
In case of fire, when a temperature of approximately 120°C is reached, the cylinder
10 made of low-melting alloy melts and, by virtue of the force applied by the spring 6 to the metal disk 12, which acts as a piston, is extruded through the through holes 13.
As a consequence, in practice the compression of the spring 6 is eliminated; by no longer contrasting the force applied by the gas 70 in overpressure, this allows the flow control means 5 to rise freely and open the opening 4, so as to allow the rapid escape of all the gas 70 from the multipurpose valve 60 and therefore from the tank.
In practice it has been found that the safety valve according to the invention fully achieves the intended aim, since in overpressure conditions it is able to evacuate a large quantity of gas from a tank, in a very short time, in compliance with current regulatory requirements.
Also, the safety valve according to the invention can be an integral part of a multipurpose valve, and is simple to manufacture and quick to install. The present valve is capable of integrating a fusible device and a spring-loaded valve, reducing space occupations and difficulties in production.
This application claims the priority of Italian Patent Application No. VI2007A000204, filed on July 18, 2007, the subject matter of which is incorporated herein by reference.

Claims

1. A safety valve for releasing gas in overpressure, comprising a cylindrical chamber provided with a plurality of lateral holes and with at least one opening which is provided on the bottom of said cylindrical chamber in order to be connected to the inside of a tank which contains said gas, said cylindrical chamber accommodating a flow control means which is kept in abutment against said opening by an elastic member, characterized that it comprises at least one fusible device which is joined to the top of said cylindrical chamber in order to keep said elastic member compressed and contrast the thrust of said gas exclusively in normal pressure and temperature conditions.
2. The safety valve according to claim 1 , characterized in that said fusible device comprises at least one cylinder made of low-melting alloy which is accommodated within an adjustment screw detachably joined to the top of said cylindrical chamber in order to adjust the compression of said elastic member.
3. The safety valve according to claim 2, characterized in that said adjustment screw comprises a plurality of through holes which are provided at the head of said valve in order to allow the extrusion of said cylinder of low-melting alloy in case of fire.
4. The safety valve according to one or more of the preceding claims, characterized in that it comprises at least one metal disk which is interposed between said cylinder made of low-melting alloy and said elastic member to prevent their direct contact.
5. The safety valve according to one or more of the preceding claims, characterized in that said flow control means comprises a bush with a polygonal cross-section which is provided with a sealing member and with a receptacle which accommodates said elastic member, said sealing member being biased in abutment against said opening by said elastic member.
6. The safety valve according to one or more of the preceding claims, characterized in that said sealing member comprises at least one elastomer pad.
7. The safety valve according to one or more of the preceding claims, characterized in that said elastic member comprises at least one spring.
PCT/EP2008/005272 2007-07-18 2008-06-27 Safety valve for releasing gas in overpressure, particularly for lpg vehicles propulsion apparatus WO2009010177A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI2007A000204 2007-07-18
ITVI20070204 ITVI20070204A1 (en) 2007-07-18 2007-07-18 SAFETY VALVE STRUCTURE, PARTICULARLY FOR THE RELEASE OF GAS IN OVERLAPPING.

Publications (1)

Publication Number Publication Date
WO2009010177A1 true WO2009010177A1 (en) 2009-01-22

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WO (1) WO2009010177A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012114358A1 (en) * 2011-02-23 2012-08-30 Emer S.P.A. Relief device, in particular for gas systems
WO2012123974A1 (en) * 2011-03-14 2012-09-20 Emer S.P.A. Relief device, in particular for gas systems
WO2014032526A1 (en) * 2012-08-29 2014-03-06 西安新思化工设备制造有限公司 Fusible alloy-type safety valve with low leakage and high sealing property
CN104508341A (en) * 2013-03-04 2015-04-08 川崎重工业株式会社 Fusible plug-type safety valve
AU2012202206B2 (en) * 2011-11-17 2015-09-17 Hyundai Motor Company Pressure sustaining system for LPG bombe
WO2016185681A1 (en) * 2015-05-15 2016-11-24 株式会社デンソー Relief valve and high-pressure pump in which same is used
DE102015103046B4 (en) * 2014-03-05 2016-12-22 Toyota Jidosha Kabushiki Kaisha safety valve
FR3052224A1 (en) * 2016-06-07 2017-12-08 Peugeot Citroen Automobiles Sa SAFETY VALVE WITH OPEN MAINTENANCE
EP3358240A1 (en) * 2017-01-31 2018-08-08 Atf S.R.L. Safety device for a pressurized gas tank and method for operating said safety device
CN109282062A (en) * 2017-07-21 2019-01-29 凯迈（洛阳）气源有限公司 Temperature, pressure safety valve
WO2020250258A1 (en) * 2019-06-11 2020-12-17 St-Il Special S.A.S. Di Cappeller Alessandro & C. Release valve
WO2022270792A1 (en) * 2021-06-23 2022-12-29 영도산업 주식회사 Pressure relief device for high-pressure vessel
WO2024103484A1 (en) * 2022-11-16 2024-05-23 上海三利数字技术有限公司 Valve core, pressure relief valve, fireproof data storage inner container and fireproof data storage device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632297A (en) * 1995-09-26 1997-05-27 Amcast Industrial Corporation Piston-type thermally or pressure activated relief device
US20030217770A1 (en) * 2002-05-24 2003-11-27 Schultz Jeffrey A. Combination thermal and pressure relief valve
EP1521022A1 (en) * 2003-09-30 2005-04-06 C.R.F. Società Consortile per Azioni A safety valve for pressurized tanks, and a tank provided with said valve
DE60023955T2 (en) * 2000-06-30 2006-05-24 Giat Industries SAFETY VALVE FOR LIQUID GAS PRESSURE TANK

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632297A (en) * 1995-09-26 1997-05-27 Amcast Industrial Corporation Piston-type thermally or pressure activated relief device
DE60023955T2 (en) * 2000-06-30 2006-05-24 Giat Industries SAFETY VALVE FOR LIQUID GAS PRESSURE TANK
US20030217770A1 (en) * 2002-05-24 2003-11-27 Schultz Jeffrey A. Combination thermal and pressure relief valve
EP1521022A1 (en) * 2003-09-30 2005-04-06 C.R.F. Società Consortile per Azioni A safety valve for pressurized tanks, and a tank provided with said valve

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012114358A1 (en) * 2011-02-23 2012-08-30 Emer S.P.A. Relief device, in particular for gas systems
WO2012123974A1 (en) * 2011-03-14 2012-09-20 Emer S.P.A. Relief device, in particular for gas systems
CN103443517A (en) * 2011-03-14 2013-12-11 艾莫股份公司 Relief device, in particular for gas systems
AU2012202206B2 (en) * 2011-11-17 2015-09-17 Hyundai Motor Company Pressure sustaining system for LPG bombe
US9145848B2 (en) 2011-11-17 2015-09-29 Hyundai Motor Company Pressure sustaining system for LPG bombe
WO2014032526A1 (en) * 2012-08-29 2014-03-06 西安新思化工设备制造有限公司 Fusible alloy-type safety valve with low leakage and high sealing property
CN104508341A (en) * 2013-03-04 2015-04-08 川崎重工业株式会社 Fusible plug-type safety valve
US9562619B2 (en) 2014-03-05 2017-02-07 Toyota Jidosha Kabushiki Kaisha Safety valve
DE102015103046B4 (en) * 2014-03-05 2016-12-22 Toyota Jidosha Kabushiki Kaisha safety valve
US10927805B2 (en) 2015-05-15 2021-02-23 Denso Corporation High pressure pump
WO2016185681A1 (en) * 2015-05-15 2016-11-24 株式会社デンソー Relief valve and high-pressure pump in which same is used
US20180087481A1 (en) * 2015-05-15 2018-03-29 Denso Corporation High pressure pump
JP2016217383A (en) * 2015-05-15 2016-12-22 株式会社デンソー Relief valve and high pressure pump using the same
FR3052224A1 (en) * 2016-06-07 2017-12-08 Peugeot Citroen Automobiles Sa SAFETY VALVE WITH OPEN MAINTENANCE
EP3358240A1 (en) * 2017-01-31 2018-08-08 Atf S.R.L. Safety device for a pressurized gas tank and method for operating said safety device
CN109282062A (en) * 2017-07-21 2019-01-29 凯迈（洛阳）气源有限公司 Temperature, pressure safety valve
WO2020250258A1 (en) * 2019-06-11 2020-12-17 St-Il Special S.A.S. Di Cappeller Alessandro & C. Release valve
CN114144612A (en) * 2019-06-11 2022-03-04 卡派勒未来有限责任公司 Release valve
US11746919B2 (en) 2019-06-11 2023-09-05 Cappeller Futura SRL Release valve
CN114144612B (en) * 2019-06-11 2023-11-24 卡派勒未来有限责任公司 Relief valve
WO2022270792A1 (en) * 2021-06-23 2022-12-29 영도산업 주식회사 Pressure relief device for high-pressure vessel
WO2024103484A1 (en) * 2022-11-16 2024-05-23 上海三利数字技术有限公司 Valve core, pressure relief valve, fireproof data storage inner container and fireproof data storage device

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