CN101663520B - Slam shut safety device - Google Patents
Slam shut safety device Download PDFInfo
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- CN101663520B CN101663520B CN2008800125438A CN200880012543A CN101663520B CN 101663520 B CN101663520 B CN 101663520B CN 2008800125438 A CN2008800125438 A CN 2008800125438A CN 200880012543 A CN200880012543 A CN 200880012543A CN 101663520 B CN101663520 B CN 101663520B
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- Prior art keywords
- spring
- slam
- barrier film
- shut safety
- valve body
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- 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
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Mechanical Engineering (AREA)
- Feeding And Controlling Fuel (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A safety device for a gas distribution system includes a valve body, an upper casing attached to the valve body, the upper casing housing two springs. The two springs are co-axially located and separated by a casting tube. Further, the two springs are attached to a movable diaphragm that is exposed to gas system pressure. A snap ring flange is also attached to the valve body, the snap ring flange being used to secure the safety device to a main regulator in the gas distribution system. The valve body also includes a cam mounted within the valve body. A limit switch is directly connected to the cam such that the limit switch moves directly in response to movement of the diaphragm. Additionally, a reset pin extends from the valve body and interacts with the cam such that the cam may be reset from a closed position to an open position by moving the reset pin.
Description
Related application
The application requires in the rights and interests of the U.S. Provisional Application 60/925,599 of submission on April 20th, 2007, and its full content is incorporated this paper by reference into.The application requires in the foreign priority rights and interests of the french patent application FR0754624 of submission on April 20th, 2007, and its full content is incorporated this paper by reference into.
Technical field
Present disclosure relates generally to the safety installations that is used for gas distributing system, more specifically, relates to emergency cut-off (slam-shut) type safety valve.
Background technique
Gas distributing system, particularly natural gas distributing system are transported to Consumer along a series of pipelines and through a series of valves from the producer with gas usually.Each gas distributing system can comprise one or more modulating valve of the gas pressure in the control distribution system.Usually, gas under high pressure is transferred through system.Yet gas pressure must be reduced before being finally allocated to the Consumer.This decompression is accomplished in the pressure-reducing station that is arranged in local network usually.
Usually, said pressure-reducing station certain safety installations of comprising one or more pressure regulator valves and when pressure regulator valve lost efficacy, cutting off air-flow.The most at large, slam-shut safety valve is used to above-mentioned purpose.For example, the U. S. Patent 4,134,421 that is incorporated into this by reference discloses a kind of slam-shut safety valve that overvoltage protection is provided in pipeline.This slam-shut safety valve roughly is arranged on the upper reaches of pressure regulator valve, makes that this Emergeny Cutoff Valves can prevent that gas from arriving pressure regulator valve under the situation that pressure regulator valve lost efficacy.Slam-shut safety valve is to the gas pressure in minimum and maximum pressure tolerance monitoring pressure regulator valve downstream.If downstream pressure surpasses the one of any of maximum or minimum allowable amount, slam-shut safety valve is closed, and leads to the air-flow of pressure regulator valve and prevents that gas from leaking because of pressure regulator valve loses efficacy uncontrollably thereby cut off.
Summary of the invention
A kind of slam-shut safety valve that is used for gas distributing system comprises valve body, is connected to the last shell of said valve body, and the said shell of going up holds two springs.Said two coaxial settings of spring and separated by cast tube.Said two springs are connected to the movable barrier film that a side is exposed to gas system pressure.The snap ring flange is connected to said valve body, and said snap ring flange is suitable for said safety installations is fixed to the master selector in the said gas distributing system.Said valve body comprises the cam that is installed in this valve body.Limit switch is directly connected to said cam, makes directly the moving and moving of the said barrier film of response of said limit switch.Return pin interacts from said valve body extension and with said cam, makes that said cam can reset to open position from closed position through moving said return pin.
Description of drawings
The object of the invention, feature and advantage will become obviously after combining following advantages specification, and said accompanying drawing comprises:
Fig. 1 is the perspective view according to the slam shut safety device of the teaching structure of present disclosure;
Fig. 2 is the cut away view of the last shell of the slam shut safety device shown in Fig. 1;
Fig. 3 A is last shell and the sectional view of the barrier film between the valve body that is arranged on the slam shut safety device of Fig. 1;
Fig. 3 B is the sectional view of barrier film of Fig. 3 A of low-pressure structure;
Fig. 3 C is the sectional view of barrier film of Fig. 3 A of high voltage structures;
Fig. 4 is the perspective view that is used for the slam-shut safety valve of Fig. 1 is fixed to the snap ring flange of main inlet control valve;
Fig. 5 A is the forward sight cut away view of valve body of the slam shut safety device of Fig. 1, its outstanding especially return pin that is positioned at reset position that shows; With
Fig. 5 B is the forward sight cut away view of valve body of the slam shut safety device of Fig. 1, its outstanding especially return pin that is positioned at again latched position that shows.
Embodiment
Referring now to accompanying drawing,, Fig. 1 illustration goes out the slam shut safety device 10 according to the teaching structure of present disclosure.Particularly, this slam shut safety device 10 is connected to the master selector (not shown) in the gas distributing system.Slam shut safety device 10 comprises valve body 12, is connected to the last shell 14 of this valve body, is installed to snap ring flange 16, the limit switch 18 of a side of valve body 12 and the return pin 20 of stretching out from valve body.Slam shut safety device 10 is connected to the master selector (not shown) through fastening piece 22.Likewise, last shell 14 is connected to valve body 12 through fastening piece 26.Fastening piece 22,26 can be bolt, rivet, screw, or be suitable for parts are connected to the fastening piece of possible any other type of another parts.
Last shell 14 (Fig. 2) held pressing spring 30 and under-voltage spring 32.Lower limit (minimum) the tolerable gas pressure that under-voltage spring 32 is confirmed in the gas distributing system.Similarly, cross the upper limit (the highest) the tolerable gas pressure that pressing spring 30 is confirmed in the gas distributing system.Overvoltage and under- voltage spring 30,32 are set in the shell 14 with coaxial configuration (that is the central axes setting of two springs) roughly.Yet these springs needn't be by coaxial setting, and these springs can axially depart from each other.Interior cast tube 34 will be crossed pressing spring 30 and separate with under-voltage spring 32.Outer cast tube 36 centered on pressing spring 30 and protected pressing spring 30 and under-voltage spring 32 that the two avoids Effect of Environmental.Under-voltage spring 32 at one end is connected to diaphragm plate 37, at one end is connected to pressure ring 41 and cross pressing spring.Cross pressure ring 41 and can be connected to diaphragm plate 37.Diaphragm plate 37 all can be connected to barrier film 42 with mistake pressure ring 41, and this will discuss hereinafter in further detail.Barrier film 42 is exposed to system pressure in a side, and the opposite side of barrier film 42 is exposed to from the spring force of crossing pressing spring 30 and under-voltage spring 32.The part of barrier film 42 is movably, and can be displaced to the inside of valve body 12 or last shell 14 according to the system pressure along axis A.Axis A is substantially parallel or coaxial with the central axis of crossing pressing spring 30 and under-voltage spring 32.
In the opposite end of barrier film 42, cross that pressing spring 30 contacts respectively with under-voltage spring 32 or against overvoltage adjustable cap 44 and under-voltage adjustable cap 46.Overvoltage adjustable cap 44 and under-voltage adjustable cap 46 can along axis A towards with away from barrier film 42 displacements.In one embodiment, overvoltage adjustable cap 44 and under-voltage adjustable cap 46 can be respectively and outer cast tube 36 and interior cast tube 34 threaded joint.Particularly, overpressure cap 44 both can also can engage with the outer surface thread of interior cast tube 34 with the internal surface of outer cast tube 36.Underpressure cap 46 can with the internal surface threaded joint of interior cast tube 34.Overpressure cap 46 all can move along axis A with underpressure cap 44, to regulate the spring tension of pressing spring 30 and 32 pairs of diaphragm plates 37 of under-voltage spring.Distance between adjustable cap 44,46 and the diaphragm plate 37 is confirmed the overvoltage and the under-voltage set point of slam shut safety device 10.Compare with traditional Emergeny Cutoff Valves, the central axis of crossing pressing spring 30 and under-voltage spring 32 is set at the same side of barrier film 42.Be convenient to regulate with under-voltage spring 32 crossing pressing spring 30 with the same side that under-voltage spring 32 all is arranged on barrier film 42 with crossing pressing spring 30 from the outside of valve.In addition, can carry out independently of each other the adjusting of crossing pressing spring 30 and under-voltage spring 32.In other words, the user can only regulate pressing spring 30, and did not influence under-voltage spring 32, perhaps can only regulate under-voltage spring 32, and not influence pressing spring 30.Be set in traditional Emergeny Cutoff Valves of opposite side of barrier film at overvoltage and under-voltage spring, the adjusting of a spring is influenced the tension force of another spring, make spring not regulated independently of each other.And, at least one embodiment, will cross that pressing spring 30 and under-voltage spring 32 are coaxial to be arranged so that shell 14 compactnesses, be installed in narrow and small or limited position, space thereby be beneficial to.
Barrier film 42 (Fig. 3 A, Fig. 3 B, Fig. 3 C) comprises and being used for the outer O shape ring 50 of last shell 14 with valve body 12 sealings.Barrier film 42 also comprises the first and second concentric room structure 52a, 52b.O shape the ring 50 and first room structure 52a is separated in outerplanar zone 51.The first room structure 52a and the second room structure 52b are separated in midplane zone 53, and the second room structure 52b and central opening 54 are separated in inner plane zone 55.The first and second room structure 52a, 52b allow single barrier film 42 be used for low-pressure structure and high voltage structures the two.Low-pressure structure is shown among Fig. 3 B, and high voltage structures is shown among Fig. 3 C.When barrier film 42 was connected to diaphragm plate 37, central opening 54 can be admitted fastening piece (for example bolt).Like this and since barrier film 42 be suitable for high voltage structures and low-pressure structure the two, so reduced manufacture cost.In addition, stock control improves because of only storing a barrier film, and can realize higher quantity ordered owing to reduced stock's number of components and parts.
Low-pressure structure comprises low pressure diaphragm plate 38, and low pressure diaphragm plate 38 is a rigid plate, and this plate covers inboard room structure 52b, inner plane zone 55 and midplane zone 53 (Fig. 3 B), and allows outside room structure 52a and outerplanar zone 51 to keep movable.Likewise, high voltage structures comprises autoclave diaphragm plate 40, and autoclave diaphragm plate 40 is a rigid plate, and this plate covers outside room structure 52a and midplane zone 53 (Fig. 3 C), and allows inboard room structure 52b, inner plane zone 55 and outerplanar zone 51 to keep movable.Adopt this mode, low pressure diaphragm plate 38 confirms with autoclave diaphragm plate 40 which part of barrier film 42 keeps which part of movable and barrier film to be prevented from moving.
Slam shut safety device 10 is connected to the master selector (not shown) through snap ring flange 16 (Fig. 4).Snap ring flange 16 comprises a plurality of openings 56 that are used to admit fastening piece 22.Further, snap ring flange 16 comprises opening 58 along an edge.Because opening 58 can be out of shape and expand so that install, so opening 58 allows quick mounting.The symmetric property of snap ring flange 16 allows slam shut safety device 10 to be connected to the master selector (not shown) in possible any orientation, and can not cause the leakage of gas and water.
Refer again to Fig. 1, valve body 12 comprises the limit switch 18 that is connected to rotatable cam 62, and cam 62 comprises three cam arm 63a, 63b, 63c.Cam 62 is connected to barrier film 42 through plunger 64 at the first cam arm 63a place.Plunger 64 comprises to the plunger arm that extends below 65.Tie point 67 places of plunger arm 65 pivot axis skew on the first cam arm 63a and cam 62 are connected to cam 62.Along with plunger 64 response moves up even as big as the overpressure conditions of the power that overcame pressing spring 30 and produce, cam 62 is rotated counterclockwise (in the present embodiment).Along with cam 62 rotation, the breech lock (latch) that is connected to the first cam arm 63a is released, and emergency cut-off plug (not shown) moves to closed position, thereby cuts off the gas supply to master selector.The spring force that responds under-voltage spring 32 overcomes the under-voltage situation of system gas pressure, and plunger 64 moves down, and causes the rotation of cam 62 clockwise directions.Behind predetermined rotating amount, the breech lock that is connected to the first cam arm 63a is released, and the emergency cut-off plug moves to closed position, thereby cuts off the gas supply to master selector.Because limit switch 18 directly is connected to cam 62 through the second cam arm 62b, and the second cam arm 62b is connected to barrier film 42 through cam 62 and plunger 64, so the rotation of limit switch 18 through cam 62 detects moving of barrier film 42.Adopt this mode, the slight change of limit switch 18 response pressures and vertically moving, thus detect moving of barrier film 42, also be like this even return pin assembly 66 damages.
Valve body 12 also comprises the return pin assembly 66 that is used for again sealed cam 62.Return pin assembly 66 comprises release link 68, sealed plug 70, travel indicator 72 (Fig. 5 A, Fig. 5 B) and reset sleeve 74 again.Interaction between the 3rd cam arm 63c of release link 68 sealed again plugs 70 of response and cam 62 and can in reset sleeve 74, sliding.Rotate along with moving of cam 62 response barrier films 42, the first shoulder 71a of the sealed again plug 70 of the 3rd cam arm 63c contact, and order about again sealed plug 70 outside (to the left side of Fig. 1, Fig. 5 A and Fig. 5 B).This then makes release link 68 outwards move, and release link 68 contact travel indicator 72 (Fig. 5 A and Fig. 5 B).Travel indicator 72 can be formed by elasticity, deformable material.When release link 68 contact travel indicator 72, the core of travel indicator 72 outwards is out of shape (shown in Fig. 5 A), thereby produces cam 62 response overvoltages or under-voltage situation and the visual and appreciable indication that rotates.Travel indicator 72 provides the protection of avoiding water or other such environmental effects through in reset sleeve 74, forming sealing, thus protection release link 68.
In case mistake/under-voltage situation is corrected, return pin assembly 66 can be used for sealed cam 62 again.The user can be with the end (being arranged on the end in the travel indicator) of release link 68 internal displacement to valve body 12.Like this, sealed again plug 70 also can be shifted, and the second shoulder 71b of sealed again plug 70 can contact the 3rd cam arm 63c, rotates to latched position again thereby order about cam 62.
Although this paper shows some exemplary embodiment and details from illustration the object of the invention, it is apparent to those skilled in the art that under the situation that does not deviate from scope of the present invention, can carry out various changes to method and apparatus disclosed herein.
Claims (18)
1. slam-shut safety valve that is used for gas distributing system, this slam-shut safety valve comprises:
Valve body;
Be installed to the last shell on the said valve body;
Be arranged on said valve body and the said barrier film of going up between the shell; At least a portion of said barrier film can be displaced to the inside of said valve body and be displaced to said inside of going up shell; Said barrier film has first side that is exposed to gas system pressure; Said barrier film comprises outer O shape ring, outerplanar portion, first room structure, midplane portion, second room structure and inner plane portion, and said first room structure and second room structure are concentric;
Be arranged on said first spring and second spring of going up in the shell, said first spring and said second spring apply spring force to second side relative with said gas system pressure of said barrier film;
Be connected to the plunger of said first side of said barrier film;
Be installed in the cam in the said valve body revolvably, said cam has the first arm, and said the first arm contacts said plunger;
Engage the breech lock of said the first arm, said breech lock is suitable for being connected to the emergency cut-off valve plug;
Wherein said plunger towards or make said cam rotation and said breech lock unclamped away from said cam mobile.
2. slam-shut safety valve according to claim 1, the coaxial setting of longitudinal axis of wherein said first spring and said second spring.
3. slam-shut safety valve according to claim 1, wherein said cam comprise second cam arm and the 3rd cam arm, and said the 3rd cam arm is suitable for contacting return pin, and said return pin can move the said valve body of turnover.
4. slam-shut safety valve according to claim 3, wherein said return pin at one end comprises the plug that resets, the said plug that resets comprises first shoulder that is suitable for contacting said the 3rd cam arm.
5. slam-shut safety valve according to claim 4; Wherein travel indicator is installed in second end of said return pin, and said travel indicator can move to the engaged retracted position of the said breech lock of indication from indicating the released extended position of said breech lock with said return pin.
6. slam-shut safety valve according to claim 5, wherein said travel indicator is formed by elastic material.
7. slam-shut safety valve according to claim 1, wherein a plate is connected to said barrier film.
8. slam-shut safety valve according to claim 7, wherein said plate cover said first room structure and said midplane portion, and do not cover said second room structure, said outerplanar portion and said inner plane portion.
9. slam-shut safety valve according to claim 7, wherein said plate cover said inner plane portion, second room structure and said midplane portion, and do not cover said first room structure and said outerplanar portion.
10. slam-shut safety valve according to claim 1, wherein said cam comprises second arm, and said second arm is suitable for contacting limit switch, and said limit switch responds the rotation of said cam and vertically moves.
11. slam-shut safety valve according to claim 1 comprises the snap ring flange that is installed in the said valve body outside, said snap ring flange is suitable for said slam-shut safety valve is fixed to a control valve, and said snap ring flange comprises opening along an edge.
12. slam-shut safety valve according to claim 11, wherein said opening allow said snap ring flange to be out of shape during installation.
13. slam-shut safety valve according to claim 1 comprises first adjustable cap of an end relative with said barrier film that is arranged on said first spring.
14. slam-shut safety valve according to claim 13; Wherein said first adjustable cap is fixed to the said shell of going up by screw thread; And said first adjustable cap can be along the axis shift of said first spring, and the displacement of said first adjustable cap changes the size that is applied to the spring force on the said barrier film by said first spring.
15. slam-shut safety valve according to claim 13 comprises second adjustable cap of an end relative with said barrier film that is arranged on said second spring.
16. slam-shut safety valve according to claim 15; Wherein said second adjustable cap is fixed to the said shell of going up by screw thread; And said second adjustable cap can be along the axis shift of said second spring, and the displacement of said second adjustable cap changes the size that is applied to the spring force on the said barrier film by said second spring.
17. a slam shut safety device comprises:
Valve body;
Be installed to the last shell on the said valve body;
Be arranged on said valve body and the said barrier film of going up between the shell, said barrier film comprises outerplanar zone, first room structure, midplane zone, second room structure and inner plane zone;
Be installed in said first spring and second spring of going up the inside of shell; Said first spring and second spring are suitable for being connected to first plate that covers said first room structure and said midplane zone; Or being connected to second plate that covers said inner plane zone, said second room structure and said midplane zone, said first plate and second plate are suitable for being connected to said barrier film.
18. an assembling is used for the method for the slam-shut safety valve of gas distributing system, comprising:
Valve body is provided;
To go up shell and be connected to said valve body;
Barrier film is fixed on said going up between shell and the said valve body, and said barrier film comprises outerplanar zone, first room structure, midplane zone, second room structure and inner plane zone;
First spring and second spring are inserted said inside of going up shell;
Said first spring is connected to first plate, and said first plate covers said first room structure and said midplane zone; Perhaps
Said second spring is connected to second plate, and said second plate covers said inner plane zone, said second room structure and said midplane zone.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US92559907P | 2007-04-20 | 2007-04-20 | |
| US60/925,599 | 2007-04-20 | ||
| FR0754624A FR2915293B1 (en) | 2007-04-20 | 2007-04-20 | SAFETY DEVICE FOR A GAS REGULATOR AND GAS RETRACTOR COMPRISING SUCH A DEVICE |
| FR0754624 | 2007-04-20 | ||
| PCT/US2008/060718 WO2008131153A2 (en) | 2007-04-20 | 2008-04-18 | Slam shut safety device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210085178.1A Division CN102628518B (en) | 2007-04-20 | 2008-04-18 | Slam shut safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101663520A CN101663520A (en) | 2010-03-03 |
| CN101663520B true CN101663520B (en) | 2012-05-30 |
Family
ID=41790640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800125438A Active CN101663520B (en) | 2007-04-20 | 2008-04-18 | Slam shut safety device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5791740B2 (en) |
| CN (1) | CN101663520B (en) |
| RU (1) | RU2608846C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU220948U1 (en) * | 2023-05-16 | 2023-10-11 | Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" | SHUT-OFF VALVE FOR GAS PIPELINE |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8616521B2 (en) * | 2011-04-15 | 2013-12-31 | Emerson Process Management Regulator Technologies, Inc. | Fail safe retaining plug assembly for a slam-shut safety device |
| CN103133731B (en) * | 2011-11-30 | 2017-11-24 | 艾默生过程管理调节技术公司 | Cut-out safety device with valve bonnet |
| ITMI20131609A1 (en) * | 2013-09-30 | 2015-03-31 | Fpt Ind Spa | PROTECTION SYSTEM OF A TURBOCHARGER SYSTEM, IN PARTICULAR FOR THE PREVENTION OF A RELATIVE DAMAGE WHEN A PRESSURE OF A RELATIVE LUBRICATION OIL IS INSUFFICIENT |
| CN106369583B (en) * | 2016-10-18 | 2019-04-12 | 天津市华诺盛源科技有限公司 | A kind of boiler protection device |
| CN108413091A (en) * | 2018-04-28 | 2018-08-17 | 苏州福特曼机器人系统有限公司 | Gas pipeline self-closing valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1505861A (en) * | 1965-12-22 | 1967-12-15 | Kromschroeder Ag G | Diaphragm-controlled pressure regulator |
| US3429321A (en) * | 1968-01-02 | 1969-02-25 | American Meter Co | Safety valve actuator |
| DE8700583U1 (en) * | 1987-01-14 | 1987-02-26 | Johann Baptist Rombach Gmbh & Co Kg, 7500 Karlsruhe | Safety shut-off valve |
| US4974629A (en) * | 1989-07-19 | 1990-12-04 | Chang Zong Shi | Gas pressure regulator for saving resetting operation |
| CN1014171B (en) * | 1988-02-29 | 1991-10-02 | 费希尔控制国际有限公司 | Droop compensated direct acting pressure regulator |
| GB2297605A (en) * | 1995-02-04 | 1996-08-07 | Jeavons Engineering Limited | Shut-off assembly for a gas flow regulator |
| FR2786242A1 (en) * | 1998-11-24 | 2000-05-26 | Fiorentini Minireg Spa | LOW AND HIGH PRESSURE SHUT-OFF VALVE |
-
2008
- 2008-04-18 CN CN2008800125438A patent/CN101663520B/en active Active
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2012
- 2012-10-11 RU RU2012143380A patent/RU2608846C2/en active
-
2014
- 2014-01-06 JP JP2014000565A patent/JP5791740B2/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1505861A (en) * | 1965-12-22 | 1967-12-15 | Kromschroeder Ag G | Diaphragm-controlled pressure regulator |
| US3429321A (en) * | 1968-01-02 | 1969-02-25 | American Meter Co | Safety valve actuator |
| DE8700583U1 (en) * | 1987-01-14 | 1987-02-26 | Johann Baptist Rombach Gmbh & Co Kg, 7500 Karlsruhe | Safety shut-off valve |
| CN1014171B (en) * | 1988-02-29 | 1991-10-02 | 费希尔控制国际有限公司 | Droop compensated direct acting pressure regulator |
| US4974629A (en) * | 1989-07-19 | 1990-12-04 | Chang Zong Shi | Gas pressure regulator for saving resetting operation |
| GB2297605A (en) * | 1995-02-04 | 1996-08-07 | Jeavons Engineering Limited | Shut-off assembly for a gas flow regulator |
| FR2786242A1 (en) * | 1998-11-24 | 2000-05-26 | Fiorentini Minireg Spa | LOW AND HIGH PRESSURE SHUT-OFF VALVE |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU220948U1 (en) * | 2023-05-16 | 2023-10-11 | Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" | SHUT-OFF VALVE FOR GAS PIPELINE |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014098544A (en) | 2014-05-29 |
| RU2608846C2 (en) | 2017-01-25 |
| RU2012143380A (en) | 2014-04-27 |
| JP5791740B2 (en) | 2015-10-07 |
| CN101663520A (en) | 2010-03-03 |
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