KR101779184B1 - Butan gas explosion visualization apparatus - Google Patents

Butan gas explosion visualization apparatus Download PDF

Info

Publication number
KR101779184B1
KR101779184B1 KR1020170034947A KR20170034947A KR101779184B1 KR 101779184 B1 KR101779184 B1 KR 101779184B1 KR 1020170034947 A KR1020170034947 A KR 1020170034947A KR 20170034947 A KR20170034947 A KR 20170034947A KR 101779184 B1 KR101779184 B1 KR 101779184B1
Authority
KR
South Korea
Prior art keywords
pressure
gas container
chamber
gas
explosion
Prior art date
Application number
KR1020170034947A
Other languages
Korean (ko)
Inventor
박남규
김진표
남정우
최영우
Original Assignee
대한민국
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 대한민국 filed Critical 대한민국
Priority to KR1020170034947A priority Critical patent/KR101779184B1/en
Application granted granted Critical
Publication of KR101779184B1 publication Critical patent/KR101779184B1/en

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/14Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force of explosions; for measuring the energy of projectiles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00Investigating or analyzing materials by the use of thermal means
    • G01N25/50Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
    • G01N25/54Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/06Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Educational Administration (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Computational Mathematics (AREA)
  • Algebra (AREA)
  • Educational Technology (AREA)
  • Mathematical Analysis (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

An embodiment of the present invention is a method of manufacturing a plasma display panel, including a first chamber, a first gas container disposed inside the first chamber, a first pressure chamber disposed inside the first chamber, A compressor connected to the first pressure portion to provide compressed air, and a first pressure valve disposed between the first pressure portion and the compressor to adjust the first pressure applied to the first gas container, Wherein the first chamber is transparent at least on one side and visualizes the external explosion of the gas container when the first pressure is applied to the first gas container at an explosion critical pressure or more, to provide.

Description

[0001] BUTAN GAS EXPLOSION VISUALIZATION APPARATUS [0002]

The present invention relates to a butane gas explosion visualization apparatus that visualizes a butane gas explosion and provides education to an instructor.

Generally, the gas container is a type of container which is filled with various fluids such as butane gas and various spraying fluids, and is able to spray the filled fluid to the outside according to the user's demand. In the case of butane gas and various injection type fluids, liquefied gas (LPG) is filled at the same time so that the contents can be pressurized to be injected smoothly. However, since the butane gas and the liquefied gas In the case of high volatility, when the impact or high temperature acts, the internal pressure of the container is increased, which may cause a safety accident such as deformation, rupture and explosion of the container.

In order to solve such a problem, a gas burner using the above-described gas container is equipped with a safety device for guiding the overpressure to a different path when a pressure equal to or higher than a reference value is applied to prevent deformation or explosion of the gas container due to overpressure do. However, it is difficult for the general public to understand the cause of the overpressure in the gas container, and the safety device for preventing the overpressure can not be confirmed from the outside, so that the risk of overpressure of the gas container and proper use of the safety device are overlooked.

The present invention provides a butane gas explosion visualization device for understanding and teaching safety of a gas combustor and the risk of overpressure of a gas container.

An embodiment of the present invention is a method of manufacturing a plasma display panel, including a first chamber, a first gas container disposed inside the first chamber, a first pressure chamber disposed inside the first chamber, A compressor connected to the first pressure portion to provide compressed air, and a first pressure valve disposed between the first pressure portion and the compressor to adjust the first pressure applied to the first gas container, Wherein the first chamber is transparent at least on one side and visualizes the external explosion of the gas container when the first pressure is applied to the first gas container at an explosion critical pressure or more, to provide.

In one embodiment of the present invention, there is provided a plasma processing apparatus comprising: a second chamber disposed adjacent to the first chamber and having at least one surface transparent; a second gas chamber disposed inside the second chamber, A gas combustor including an explosion-proof unit operable when pressure is applied to the container at a pressure higher than a reference pressure; a gas burner disposed inside the second chamber, connected to the compressor, And a second pressure valve disposed between the second pressure unit and the compressor to adjust the second pressure applied to the second gas container.

In one embodiment of the present invention, the second pressure may be the same pressure as the first pressure.

The first pressure sensor may be connected to the first pressure unit to measure the magnitude of the first pressure, and a second pressure sensor connected to the second pressure unit to measure the magnitude of the second pressure. And may further include a pressure sensor.

In one embodiment of the present invention, the display unit may further include a display unit for externally displaying the magnitude of the first pressure and the magnitude of the second pressure.

In one embodiment of the present invention, the second pressure portion can apply the second pressure to the second gas container with the explosion prevention unit interposed therebetween.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

In the embodiments of the present invention, the butane gas explosion visualization apparatus can visually externally visualize the explosion of the gas container when the first pressure is applied to the first gas container above the explosion critical pressure. In other words, a butane gas explosion visualization apparatus according to an embodiment of the present invention visually provides to an instructor how the first gas container is deformed and exploded when overpressure is applied to a first gas container storing butane gas , It is possible to effectively educate the danger caused by the overpressure applied to the gas container.

1 is a conceptual diagram schematically showing a butane gas explosion visualization apparatus according to an embodiment of the present invention.
2 is a conceptual diagram schematically showing a butane gas explosion visualization apparatus according to another embodiment of the present invention.
3 is a block diagram of a butane gas explosion visualization apparatus of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below, but may be implemented in various forms.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning.

In the following examples, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

In the following embodiments, terms such as inclusive or possessive are intended to mean that a feature, or element, described in the specification is present, and does not preclude the possibility that one or more other features or elements may be added.

In the following embodiments, when a part of a film, an area, a component or the like is on or on another part, not only the case where the part is directly on the other part but also another film, area, And the like.

In the drawings, components may be exaggerated or reduced in size for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

If certain embodiments are otherwise feasible, the particular process sequence may be performed differently from the sequence described. For example, two processes that are described in succession may be performed substantially concurrently, and may be performed in the reverse order of the order described.

In the following embodiments, when a film, an area, a component, or the like is referred to as being connected, not only the case where the film, the region, and the components are directly connected but also the case where other films, regions, And indirectly connected. For example, in the present specification, when a film, an area, a component, and the like are electrically connected, not only a case where a film, an area, a component, etc. are directly electrically connected but also another film, And indirectly connected electrically.

1 is a conceptual diagram schematically showing a butane gas explosion visualization apparatus 10 according to an embodiment of the present invention.

1, a butane gas explosion visualization apparatus 10 according to an embodiment of the present invention includes a first chamber 101, a first gas container 110, a first pressure unit 120, a compressor 130, And a first pressure valve (140).

The first chamber 101 may be made of a transparent material such as acrylic or tempered glass on at least one side thereof so that the inner region can be viewed through the first gas container 110 to observe deformation and explosion thereof. The shape of the first chamber 101 is not limited and may be made of materials and structures that can withstand the pressure or heat generated by the explosion. A cushioning material (not shown) may be disposed in the first chamber 101 to minimize the risk of an accident caused by an explosion.

The first gas container 110 may be disposed inside the first chamber 101. The first gas container 110 may be a commonly used portable butane gas container. The first gas container 110 is fixed to the fixing member 103 and disposed inside the first chamber 101, thereby minimizing the risk of an accident caused by the explosion of the first gas container 110.

The first pressure portion 120 is disposed inside the first chamber 101 and may be connected to the first gas container 110 to apply the first pressure to the first gas container 110. Although the shape of the first pressure portion 120 is exaggerated for ease of explanation, the first pressure portion 120 may be a pressure pipe connected to the first gas container 110. The first pressure portion 120 is connected to the compressor 130 to supply the compressed air supplied from the compressor 130 to thereby apply the first pressure to the first gas container 101. [

The compressor 130 may be disposed inside the container 105 provided under the first chamber 110. The compressor 130 generates compressed air, and can be implemented in various ways such as a centrifugal type.

The first pressure valve 140 may be disposed between the first pressure portion 120 and the compressor 130 to adjust the first pressure applied to the first gas container 110. The first pressure valve 140 may be controlled by a control unit (not shown) to adjust the first pressure by opening / closing the flow path of the compressed air supplied from the compressor 130. However, the present invention is not limited thereto, and the first pressure valve 140 may adjust the first pressure by adjusting the flow rate of the compressed air supplied from the compressor 130.

The butane gas explosion visualization apparatus 10 may further include a first pressure sensor 150 connected to the first pressure unit 120 to measure a magnitude of the first pressure. The first pressure sensor 150 may measure the magnitude of the first pressure to generate a first pressure value and provide the first pressure value to a control unit (not shown). The control unit (not shown) may control the first pressure valve 140 while comparing the reference pressure set in advance with the first pressure value. At this time, the reference pressure may vary depending on the phenomenon to be observed. In other words, when it is desired to observe only the deformation of the first gas container 101 due to overpressure, the deformation critical pressure can be the reference pressure. Alternatively, when it is desired to observe the explosion of the first gas container 101 due to overpressure, the explosion critical pressure may be the reference pressure.

Meanwhile, the butane gas explosion visualization apparatus 10 may further include a display unit 190 for displaying the magnitude of the first pressure externally. The display unit 190 displays the first pressure value measured from the first pressure sensor 150 and the reference pressure described above externally so that the current degree of pressure is applied to the first gas container 101 You can tell if it is.

As described above, the butane gas explosion visualization apparatus 10 according to an embodiment of the present invention visualizes the process of explosion of the gas container when the first pressure is applied to the first gas container at an explosion critical pressure or more . In other words, the butane gas explosion visualization apparatus 10 according to an embodiment of the present invention visualizes how the first gas container is deformed and exploded when overpressure is applied to the first gas container storing the butane gas, It is possible to effectively educate the danger caused by the overpressure applied to the gas container.

FIG. 2 is a conceptual view schematically showing a butane gas explosion visualization apparatus 20 according to another embodiment of the present invention, and FIG. 3 is a block diagram of a butane gas explosion visualization apparatus 20 of FIG.

2 and 3, a butane gas explosion visualization apparatus 20 according to another embodiment of the present invention includes a first chamber 201A, a first gas container 211A, a first pressure unit 221, The first pressure sensor 241, the first pressure sensor 251, the second chamber 201B, the gas combustor 210, the second pressure portion 223, the second pressure valve 243, the second pressure sensor 253 A compressor 230, and a display unit 290. [0033]

The first chamber 201A may be made of a transparent material such as acrylic or tempered glass on at least one side so that the inner region can be viewed through the first gas container 211 so that the first gas container 211 can be observed for deformation and explosion. The shape of the first chamber 201A is not limited, and may be made of materials and structures capable of withstanding pressure or heat generated by the explosion.

The first gas container 211A may be disposed inside the first chamber 201A. The first gas container 211A may be a commonly used portable butane gas container.

The first pressure portion 221 is disposed inside the first chamber 201A and may be connected to the first gas container 211A to apply the first pressure to the first gas container 211A.

The second chamber 201B has at least one surface such as acrylic or tempered glass so as to observe the phenomenon during the overpressure of the gas combustor 210 operating with the second gas container 211B, And may be made of a transparent material. In addition, as with the first chamber 201A, there is no limitation to the shape and the material and structure can withstand pressure or heat generated by the explosion.

The gas combustor 210 is disposed inside the second chamber 201B and is operated when the second gas container 211B is mounted and pressure is applied to the mounted second gas container 211B over a reference pressure, Prevention unit 213, as shown in FIG. The explosion prevention unit 213 may be a safety device mounted on a known gas combustor 210. [ For example, when the overpressure prevention unit 213 is provided with an elastic spring and overpressure is applied to the second gas container 211B, the gas in the second gas container 211B may be discharged through another path, 211B can be prevented from exploding. However, the present invention is not limited thereto, and any method capable of preventing overpressure of the second gas container 211B is applicable. At this time, the second gas container 211B may be a gas container having the same conditions as the first gas container 211A for the accuracy of the test.

The second pressure portion 223 is disposed inside the second chamber 201B and connected to the compressor 230 to apply the second pressure to the second gas container 211B by the compressed air supplied from the compressor 130 . The second pressure portion 223 is connected to the compressor 230 to provide the compressed air supplied from the compressor 230 so that the second pressure can be supplied to the gas combustor, It can be applied to the gas container 211B.

The compressor 230 may be disposed inside the container 205 provided under the first chamber 201A and the second chamber 201B. The compressor 230 generates compressed air, and can be implemented in various ways such as a centrifugal type.

The first pressure valve 241 and the second pressure valve 243 are disposed between the first pressure portion 221 and the compressor 230 and between the second pressure portion 223 and the compressor 230, . The first pressure valve 241 and the second pressure valve 243 can adjust the first pressure applied to the first gas container 211A and the second pressure applied to the second gas container 211B, respectively. The first pressure valve 241 and the second pressure valve 243 are controlled by a control unit (not shown) to control the first pressure and the second pressure by opening and closing the flow path of the compressed air supplied from the compressor 230 . However, the present invention is not limited thereto, and the first pressure valve 241 and the second pressure valve 243 may control the flow rate of the compressed air supplied from the compressor 230 to adjust the first pressure and the second pressure have.

At this time, the second pressure applied to the second gas container 211B may be the same pressure as the first pressure applied to the first gas container 211A. In other words, the butane gas explosion visualization apparatus 20 according to another embodiment is configured such that when the same pressure is applied to the first gas container 211A and the second gas container 211B, the first gas container 211A And the second gas container 211B mounted in the gas combustor 210 having the explosion prevention unit 213 as a safety device can be provided to the trainee at the same time. However, the present invention is not limited to this, and it goes without saying that the first pressure and the second pressure may be provided differently.

The first pressure sensor 251 and the second pressure sensor 253 are respectively connected to the first pressure unit 221 to measure a magnitude of the first pressure to generate a first pressure value, 223 to measure the magnitude of the second pressure to produce a second pressure value. The control unit (not shown) receives the generated first pressure value and the generated second pressure value and compares the first reference pressure with the first pressure value and the second pressure value, 2 < / RTI > At this time, the reference pressure may vary depending on the phenomenon to be observed. In other words, when only the deformation of the gas container due to overpressure is to be observed, the deformation critical pressure can be the reference pressure. Alternatively, when the explosion of the gas container due to overpressure is to be observed, the explosion critical pressure may be the reference pressure.

The display unit 290 externally displays the first pressure value, the second pressure value, and the reference pressure measured from the first pressure sensor 251 and the second pressure sensor 253, Can be informed whether or not the pressure of the first gas container 211A is being applied to the first gas container 211A and the second gas container 211B.

As described above, the butane gas explosion visualization apparatus according to another embodiment of the present invention can apply the same overpressure to the first gas container having no safety device and the second gas container mounted to the gas combustor having the safety device , It is possible to effectively educate the difference in the phenomenon depending on the presence or absence of the safety device when overpressure is applied.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments, and that various changes and modifications may be made therein without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10, 20: butane gas explosion visualization device
201A: first chamber
201B: Second chamber
210: Gas Combustor
211A: first gas container
211B: Second gas container
213: Explosion prevention unit
221: first pressure portion
223: second pressure portion
230: compressor
241: First pressure valve
243: Second pressure valve
251: first pressure sensor
253: second pressure sensor
290:

Claims (6)

A first chamber;
A first gas container disposed inside the first chamber;
A first pressure portion disposed inside the first chamber and applying a first pressure to the first gas container;
A compressor connected to the first pressure portion to provide compressed air;
A first pressure valve disposed between the first pressure portion and the compressor to adjust the first pressure applied to the first gas container;
A second chamber disposed adjacent to the first chamber and having at least one side transparent;
A gas combustor disposed within the second chamber, the gas combustor including a second gas container mounted thereon and operated when pressure is applied to the mounted second gas container above a reference pressure;
A second pressure portion disposed in the second chamber and connected to the compressor to apply a second pressure to the second gas container by the compressed air provided from the compressor; And
And a second pressure valve disposed between the second pressure portion and the compressor to adjust the second pressure applied to the second gas container,
Wherein the first chamber is transparent at least on one side to visualize the exterior of the gas container exploding when the first pressure is applied to the first gas container above the explosion critical pressure.
delete The method according to claim 1,
Wherein the second pressure is the same pressure as the first pressure.
The method according to claim 1,
A first pressure sensor connected to the first pressure unit and measuring a magnitude of the first pressure; And
And a second pressure sensor connected to the second pressure unit and measuring a magnitude of the second pressure.
5. The method of claim 4,
And a display unit for externally displaying the magnitude of the first pressure and the magnitude of the second pressure.
The method according to claim 1,
And the second pressure portion applies the second pressure to the second gas container with the explosion prevention unit interposed therebetween.
KR1020170034947A 2017-03-20 2017-03-20 Butan gas explosion visualization apparatus KR101779184B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020170034947A KR101779184B1 (en) 2017-03-20 2017-03-20 Butan gas explosion visualization apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020170034947A KR101779184B1 (en) 2017-03-20 2017-03-20 Butan gas explosion visualization apparatus

Publications (1)

Publication Number Publication Date
KR101779184B1 true KR101779184B1 (en) 2017-09-19

Family

ID=60033596

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020170034947A KR101779184B1 (en) 2017-03-20 2017-03-20 Butan gas explosion visualization apparatus

Country Status (1)

Country Link
KR (1) KR101779184B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102283462B1 (en) * 2021-01-22 2021-07-29 서울특별시 education apparatus for experiencing methane explosion in sewer pipe
CN114783250A (en) * 2022-04-20 2022-07-22 伊犁师范大学 Physical experiment teaching equipment
KR102535498B1 (en) 2022-11-21 2023-05-26 이왕재 An apparatus for inflammability gas by remote control

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200220945Y1 (en) * 2000-11-13 2001-04-16 송기찬 An apparatus for making fire and gas explosion for the purpose of education
KR100690585B1 (en) 2006-03-28 2007-03-12 (주)미디어스페이스 The apparatus of compare experience with explostion-proof construction

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200220945Y1 (en) * 2000-11-13 2001-04-16 송기찬 An apparatus for making fire and gas explosion for the purpose of education
KR100690585B1 (en) 2006-03-28 2007-03-12 (주)미디어스페이스 The apparatus of compare experience with explostion-proof construction

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102283462B1 (en) * 2021-01-22 2021-07-29 서울특별시 education apparatus for experiencing methane explosion in sewer pipe
WO2022158732A1 (en) * 2021-01-22 2022-07-28 서울특별시 Equipment for sewer pipe methane gas explosion training
CN114783250A (en) * 2022-04-20 2022-07-22 伊犁师范大学 Physical experiment teaching equipment
CN114783250B (en) * 2022-04-20 2023-06-06 伊犁师范大学 Physical experiment teaching equipment
KR102535498B1 (en) 2022-11-21 2023-05-26 이왕재 An apparatus for inflammability gas by remote control

Similar Documents

Publication Publication Date Title
KR101779184B1 (en) Butan gas explosion visualization apparatus
US20200109999A1 (en) Apparatus for valve-seat inspection and pressure-resistance inspection for valves, and valve
JP2019510181A (en) Gas valve safety valve
JP5074546B2 (en) Glove leak inspection device
JP2018179840A (en) Air leak tester and air leak test method
CN107085320B (en) Method for measuring optical path difference of liquid crystal panel
BR112012027663B1 (en) multimode pressure relief valve
US20110220222A1 (en) System to control pressure in a test device
JP2004191105A (en) Gas leakage detection hole for inspecting airtightness of valve means
JP2005172735A (en) Liquid quantity measuring device
KR20200113982A (en) Performance test measurement equipment for safety valve
KR101021443B1 (en) Pressure and depressure control piston cylinder of pressure guage calibrating device
JP5429965B2 (en) Pressure regulator
RU2597415C2 (en) Explosion-proof membranes analysis plant
US20210239276A1 (en) Method for detecting leaks in a pressurised gas tank head and tank head for use of such a method
Fojtášek et al. Comparison and mathematical modelling of leakage tests
KR20170059035A (en) Pressure regulating appartus, and apparatus and method for test of switch including the same
US1023596A (en) Gas-regulator.
EP3455546B1 (en) A gas pressure regulator
US20060137748A1 (en) Expansion valve block with co-ordinated high-and low-pressure circuit control means
EP3707426B1 (en) Modular gas control attachment assembly for cylinders
JP6865710B2 (en) Gas meter
TW201303195A (en) Pressure regulator
KR101590612B1 (en) The leakage surveillance device for fire extinguishing agent
SU1765740A1 (en) Superimposed chamber

Legal Events

Date Code Title Description
GRNT Written decision to grant