CN88101490A - The stepped piston that is used for the safety relief valve of balanced type guide control - Google Patents
The stepped piston that is used for the safety relief valve of balanced type guide control Download PDFInfo
- Publication number
- CN88101490A CN88101490A CN198888101490A CN88101490A CN88101490A CN 88101490 A CN88101490 A CN 88101490A CN 198888101490 A CN198888101490 A CN 198888101490A CN 88101490 A CN88101490 A CN 88101490A CN 88101490 A CN88101490 A CN 88101490A
- Authority
- CN
- China
- Prior art keywords
- mentioned
- piston
- pressure
- pressure chamber
- valve
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 230000000694 effects Effects 0.000 claims description 3
- 230000006837 decompression Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
Images
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
-
- 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
- F16K17/10—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 with auxiliary valve for fluid operation of the main valve
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The main valve piston that balanced type guide controls safety relief valve is the stepped piston of different cross section, and it has dwindling the area end portion and being contained in the interior increased area end branch of pressure chamber of sealing principal pressure pipeline.Main line pressure is directed to pressure chamber by pilot valve, and this pressure acts on and forces piston to dwindle valve base sealing between area end and main line and the discharge pipe line on the increased area in the pressure chamber, and the pressure that releases pressure chamber up to pilot valve is opened main valve.The increased area end of piston divide with discharge pipe line in the backpressure sealing, the work pressure in offset pressure chamber of the pressure one that prevents backpressure and main line makes piston disengaging valve seat.
Description
The relevant Decompression valves of the present invention, the safety relief valve of particularly relevant balanced type guide control, this valve has a main valve, and main valve includes a stepped piston with different cross section, thereby does not need to install the anti-reverse-flow device.
Have different cross section Decompression valves in the form of piston a main valve piston is arranged, piston leans against on the valve seat, to seal a pressure pipeline or container, main valve piston is contained in a pressure chamber or the chamber slidably, pressure in the principal pressure pipeline enters pressure chamber by a pilot valve, in the ordinary course of things, the pressure in the pressure chamber equates with pressure in the principal pressure pipeline.Because the area of this piston in pressure chamber be greater than by the area that valve seat limited, so, as long as the pressure in the pressure chamber equates that with pressure in the main line pressure in the pressure chamber makes valve piston near valve seat.
The effect that is connected the pilot valve between main line and the pressure chamber is, when the pressure of main line reaches a predetermined value, with the pressure pressure release in the pressure chamber, the pressure release of pressure chamber makes the pressure of main line force piston to break away from valve seat, thereby the pressure that makes main line is let out to discharge pipe line, and when the pressure in the principal pressure pipeline was reduced to a predetermined value, pilot valve made the pressure chamber supercharging, thereby force piston to press to valve seat, close main valve.
The shortcoming of traditional Decompression valves piston is, be subjected to back-pressure effect in the discharge pipe line in the piston area of valve seat place discharge pipe line side, the pressure in contrast of this back-pressure and pressure chamber, because the piston area that is exposed in the main line adds that the piston area that is exposed in the discharge pipe line is substantially equal to the piston area in the pressure chamber, the discharge pipe line pressure that is higher than main line pressure adds that the pressure of main line will offset with the pressure in the pressure chamber and piston is lifted off a seat, thereby the pressure in the discharge pipe line is let out to main line, in order to prevent this from occurring, She Ji Decompression valves included an anti-reverse-flow device in the past, made main valve main valve under the high back-pressure situation of discharge pipe line still can keep sealing.
Decompression valves in prior art must have the anti-reverse-flow device, will inevitably increase the piston area that is exposed in the main line because reduce the piston area that is exposed in the discharge pipe line simply.Since be exposed in the main line piston area near the piston area in the pressure chamber, pressure difference can reduce to and make the poorly sealed of valve seat.
Therefore, in order to reduce cost and the complexity that traditional guide controls safety relief valve, the anti-reverse-flow device needn't be installed thereby must improve main valve.
The present invention is the safety relief valve of a balanced type guide control, and this valve has a main valve, and main valve has one and has the not stepped piston in cross section, and this valve needn't be installed the anti-reverse-flow device.
Stepped piston of the present invention has one to dwindle the area end portion, and the valve base sealing between principal pressure pipeline and discharge pipe line, and the stepped increased area end branch that piston makes progress is contained in the pressure chamber slidably.Pressure chamber comprises one by sleeve and the cylindrical cavity that top board limited that is contained on the main valve housing, the endoporus that this sleeve includes an increased diameter forms above-mentioned cavity to place the increased area end branch of piston, endoporus with a diameter reduction, the area end portion of dwindling of piston is mounted in it and is directed to valve seat, between the endoporus that dwindles area end and sleeve diameter reduction of piston, be provided with a sealing, in case the backpressure of going up in the discharge pipe line acts on the increased area end of piston in the pressure chamber.When main valve piston was located on the valve seat, valve seat was exposed in the backpressure in the piston area of discharge pipe line one side.Yet this area can be reduced to zero, remains piston area less than the increasing under the system pressure that is exposed in the pressure chamber because stepped piston is exposed to area in the main line at the valve seat place.Therefore, can reduce to be exposed to the piston area in the back-pressure of discharge pipe line significantly, and can not reduce the power that makes piston and valve base sealing, consequently no longer need to install other anti-reverse-flow device.
In order more fully to understand the present invention and further advantage thereof, below in conjunction with accompanying drawing, describe preferred embodiment of the present invention in detail with reference to the reference symbol that is marked, wherein:
Fig. 1 is the vertical cross section that the guide of a prior art controls safety relief valve, has wherein shown the main valve by the conventional method design;
Fig. 2 is the vertical cross section that a balanced type guide controls safety relief valve, has shown that wherein the present invention has the main valve of the stepped piston of different cross section.
Referring to Fig. 1, be a guide by conventional method design controls safety relief valve among the figure, wherein shown the problem that has been overcome by the present invention, safety relief valve 10 includes a principal pressure pipeline 12, is connected (not shown) with a pressurizing vessel or pipeline.Safety relief valve 10 also comprises a pressure discharge pipe 14 and is placed in valve piston 16 on the valve seat 18, so that sealing between principal pressure pipeline 12 and the pressure discharge pipe line 14.
Pressure in the principal pressure pipeline 12 passes in pressure chamber or the chamber 22 by pilot valve 20 by pressure pickup line road 19 again.Pressure chamber 22 is with sleeve 21, and top board 23 and piston 16 are the boundary.Piston 16 is contained in the sleeve 21 slidably.Helical spring 24 or other biased member can be set in the pressure chamber, and so that piston 16 is pressed to valve seat 18, the pressure P in the pressure chamber 22 acts on the area A of piston 16
2On, make the tight sealing of formation between piston 16 and the valve seat 18.A sealing is set, and for example O type seal ring 26 makes the pressure P in the pressure chamber 22
2With 12 sealings of pressure discharge pipe line.In the ordinary course of things, the pressure P in the principal pressure pipeline 12
1With the pressure P in the pressure chamber 22
2Equate.Therefore, because area A
2Greater than area A
1, the net pressure that acts on the piston 16 forces piston 16 and valve seat 18 sealings, in addition, and along with pressure P
1Increase, piston 16 acts on power on the valve seat 18 also along with increase, thereby keeps tight sealing.
When the pressure in the main line 12 surpassed predetermined limit value, pilot valve 20 worked, with the pressure P pressure release in the pressure chamber 22.Along with the pressure release of pressure chamber 22, the pressure P that acts in the main line on the area A forces piston 16 to lift off a seat 18, and main line 12 is communicated with discharge pipe line 14.When pressure P drops to predetermined value when following, pilot valve closing pressure chambers 22 20, thus piston 16 is got back on the valve seat 18.
As shown in Figure 1, the balance guide who designs by conventional method controls safety valve, in discharge pipe line one side of valve seat 18, the area A on the piston 16
3Be subjected to the backpressure P in the discharge pipe line 14
3Effect.Act on area A
3On pressure P
3With act on area A
1On pressure P
1Act on area A together with in the pressure chamber 22
2On pressure P
2Direction is relative.Because area A
1With area A
3Sum is substantially equal to area A
2, greater than the main line pressure P
1Backpressure P
3Will make piston 16 lift off a seat 18, make reverse discharge pressure P
3Feed main line 12.This is to do one's utmost to be avoided the phenomenon that takes place, and therefore this safety valve as shown in Figure 1 must be provided with an anti-reverse-flow device (not shown) that separates, and is not subjected to discharge pipe line 14 internal pressure P to guarantee the piston 16 and the sealing of valve seat 18
3The influence of value.
Safety relief valve of the present invention 30 does not as shown in Figure 2 need anti-stream device separately.Safety relief valve 30 includes 32, one discharge pipe lines 34 of a principal pressure pipeline and the step piston 36 with different cross section, and piston 36 is placed on the valve seat 38, makes sealing between principal pressure pipeline 32 and the pressure discharge pipe line 14.Pressure P in the main line
4Act on the area A of piston 16
4On, and by pressure pickup line road 39, pass in pressure chamber or the chamber 42 by pilot valve 40 again.Pressure chamber 42 is with sleeve 41, and top board 43 and piston 36 are the boundary, and piston 36 is contained in the sleeve 41 slidably.Sleeve 41 has the endoporus of an increasing, communicates with pressure chamber 42 to form pressure chamber 42 and an endoporus that dwindles.A helical spring 44 or other biased member can be set, so that piston 16 is pressed to valve seat 38 in pressure chamber 42.Pressure P in the pressure chamber 42
5Act on the area A of piston 36
5On, make the tight sealing of formation between piston 36 and the valve seat 38.A sealing is set, O type seal ring 26 for example, the pressure P when piston 36 moves back and forth in the sealing load chamber 42 in sleeve 41
5
Piston 36 of the present invention is designed to have the stepped shaft of different cross section, dwindles in the endoporus that dwindles that the cross section end portion is contained in sleeve 41 its area A
4Lean against on the valve seat 38; The increased area end branch has area A
5, this part is whole to be limited in the pressure chamber 42.A sealing 48 is arranged in addition, and sealing can comprise for example O type ring, and barrier film or bellows are to prevent the pressure P in the discharge pipe line 34
6Act on the piston of the increased area part in the sleeve 41.Opposite with the piston 16 in the safety relief valve shown in Fig. 1 10, the area A of the stepped piston 36 on discharge pipe line one side of valve seat 38
6Can be reduced to zero.Both made A
6Area be zero, area A
4Can be still less than area A
5, therefore act on area A in the pressure chamber 42
5On pressure P
5(be generally equal to pressure P
4) can provide a net pressure to keep stepped piston 36 and valve seat 38 tight seals.In addition, backpressure P
6Only act on the area A of very little (or being zero)
6On, with the pressure P in the renitency chamber 42
5Therefore, pressure P
6Must be far longer than the main line pressure P
4Shi Caihui makes piston 36 break away from valve seat 38.Consequently, stepped piston 36 can prevent pressure P
6Anti-inflow main line, and do not need other anti-reverse-flow device.
Although described the present invention according to specific embodiment above, obviously those skilled in the art can propose various changes and improvements, and the invention is intended to these changes and improvements are included in the described scope of back claim.
Claims (12)
1, a kind of safety relief valve includes:
The housing that connects principal pressure pipeline and discharge pipe line;
Be contained in the above-mentioned housing valve seat on the principal pressure pipeline;
Be contained in the above-mentioned housing, form the cylindrical sleeve of a pressure chamber;
Stepped piston with different cross section includes one and dwindles the area end portion, is located on the above-mentioned valve seat and an increased area end branch, is contained in slidably in the above-mentioned sleeve, and is reciprocating in above-mentioned pressure chamber;
Pressure in the above-mentioned principal pressure pipeline is guided to device in the above-mentioned pressure chamber, and the pressure in the principal pressure pipeline acts on above-mentioned piston increased area end and divides, and makes above-mentioned piston reduction face end portion and above-mentioned valve seat contact seal.
Device with the sealing of the back pressure in above-mentioned pressure chamber and the above-mentioned discharge pipe line.
2, according to the safety relief valve of claim 1, wherein above-mentioned valve seat on discharge pipe line one side, piston dwindle the area end portion be exposed to pressure chamber in the area of the backpressure that offsets of pressure be zero substantially.
3, according to the safety relief valve of right 1 or 2, wherein above-mentioned sleeve includes:
The endoporus of increased diameter forms above-mentioned pressure chamber; With
The endoporus of diameter reduction, the area end portion of dwindling of above-mentioned piston is mounted in it and extends to above-mentioned valve seat slidably.
4, according to the safety relief valve of claim 3, wherein above-mentioned seal arrangement includes first sealing, is arranged between the endoporus that above-mentioned piston dwindles area end portion and above-mentioned sleeve diameter reduction.
5, according to the safety relief valve of claim 4, wherein first sealing includes an O type seal ring.
6, according to the safety relief valve of claim 4 or 5, wherein above-mentioned seal arrangement includes second sealing, is arranged between the endoporus of above-mentioned piston increased area end branch and above-mentioned sleeve increased diameter.
7, according to the safety relief valve of claim 6, wherein second sealing includes an O type seal ring.
8, a kind of guide controls safety relief valve, is used for the pressure that the principal pressure pipeline is too high and lets out to discharge pipe line, includes:
The housing that has the cylindrical sleeve that forms a pressure chamber;
Be contained in the valve seat between interior principal pressure pipeline of above-mentioned housing and the discharge pipe line;
Stepped piston with different cross section, this piston have one to dwindle the area end portion, with above-mentioned valve base sealing and an increased area end branch, are contained in slidably in the above-mentioned sleeve, and be reciprocating in above-mentioned pressure chamber;
The pressure of above-mentioned principal pressure pipeline is guided to the pilot valve of above-mentioned pressure chamber, to force piston and above-mentioned valve seat contact seal;
Above-mentioned piston dwindle seal arrangement between area end portion and the above-mentioned sleeve, with the increased area end branch of sealing load chamber and above-mentioned piston, make it not be subjected to the effect of the backpressure of discharge pipe line.
9, guide according to Claim 8 controls safety relief valve, wherein above-mentioned sleeve comprises the endoporus of an increased diameter that forms above-mentioned pressure chamber and the endoporus of a diameter reduction, the increased area end branch of above-mentioned piston is mounted in it slidably, and extends to above-mentioned valve seat.
10, the guide according to claim 9 controls safety relief valve, and wherein above-mentioned seal arrangement includes an O type seal ring, is arranged between the endoporus that dwindles area end portion and sleeve diameter reduction of piston, seals when above-mentioned reciprocating motion of the pistons.
11, the guide according to claim 9 or 10 controls safety relief valve, wherein also includes one second seal arrangement, the increased area end that is arranged on piston divide and the endoporus of sleeve increased diameter between, when reciprocating motion of the pistons, seal.
12, the guide according to claim 11 controls safety relief valve, and wherein second device includes an O type seal ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US2880387A | 1987-03-23 | 1987-03-23 | |
| US028803 | 1987-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN88101490A true CN88101490A (en) | 1988-10-26 |
Family
ID=21845522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198888101490A Pending CN88101490A (en) | 1987-03-23 | 1988-03-18 | The stepped piston that is used for the safety relief valve of balanced type guide control |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS63254278A (en) |
| KR (1) | KR880011511A (en) |
| CN (1) | CN88101490A (en) |
| AU (1) | AU1320088A (en) |
| BR (1) | BR8801154A (en) |
| ES (1) | ES2006604A6 (en) |
| FR (1) | FR2613020A1 (en) |
| GB (1) | GB2202612A (en) |
| IT (1) | IT1219508B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100380033C (en) * | 2003-08-19 | 2008-04-09 | 查谦 | Back-pressure balancing minimum pressure valves |
| CN101220881B (en) * | 2007-12-18 | 2010-06-23 | 刘梦真 | Pressure breaking device |
| WO2010124661A1 (en) * | 2009-05-01 | 2010-11-04 | Yang Cong | Pressure regulating device, compressed air supply system and motor vehicle |
| CN101476564B (en) * | 2009-01-20 | 2010-12-01 | 曹康年 | Security induction valve |
| CN101839359B (en) * | 2009-11-18 | 2012-01-11 | 南京工程学院 | Variable-difference relief valve |
| CN101836020B (en) * | 2008-03-27 | 2012-11-14 | 艾拉斯科普库空气动力股份有限公司 | Minimum pressure valve |
| CN103223934A (en) * | 2012-01-25 | 2013-07-31 | 株式会社万都 | Pre-fill system to improve brake feel and method of increasing initial flux using the same |
| CN103644339A (en) * | 2013-11-25 | 2014-03-19 | 大连元利流体技术有限公司 | Pollution resistant pilot operated relief valve |
| CN106523750A (en) * | 2016-12-26 | 2017-03-22 | 苏州艾尔泰流体控制有限公司 | Pressure relief valve accelerator and pressure relief structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU88384A1 (en) * | 1993-07-16 | 1995-02-01 | Hydrolux Sarl | 2-way cartridge valve as a seat valve |
| CA2189613C (en) * | 1995-11-16 | 2004-07-20 | David William Birch | Pressure reduction valve |
| DE19727003A1 (en) * | 1997-06-25 | 1999-01-07 | Bosch Gmbh Robert | Hydraulically pilot operated pressure valve |
| US8870233B2 (en) | 2007-07-03 | 2014-10-28 | S.P.M. Flow Control, Inc. | Swivel joint with uniform ball bearing requirements |
| WO2010123889A2 (en) | 2009-04-20 | 2010-10-28 | Weir Spm, Inc. | Flowline flapper valve |
| WO2010141651A2 (en) | 2009-06-03 | 2010-12-09 | Weir Spm, Inc. | Plug valve indicator |
| WO2014028498A2 (en) | 2012-08-16 | 2014-02-20 | S.P.M. Flow Control, Inc. | Plug valve having preloaded seal segments |
| US9322243B2 (en) | 2012-08-17 | 2016-04-26 | S.P.M. Flow Control, Inc. | Automated relief valve control system and method |
| US9273543B2 (en) | 2012-08-17 | 2016-03-01 | S.P.M. Flow Control, Inc. | Automated relief valve control system and method |
| USD707332S1 (en) | 2013-03-15 | 2014-06-17 | S.P.M. Flow Control, Inc. | Seal assembly |
| USD707797S1 (en) | 2013-03-15 | 2014-06-24 | S.P.M. Flow Control, Inc. | Seal segment |
| WO2015002863A1 (en) | 2013-07-01 | 2015-01-08 | S.P.M. Flow Control, Inc. | Manifold assembly |
| RU2560651C2 (en) * | 2013-08-08 | 2015-08-20 | Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации | Dynamically stable drain safety valve |
| WO2016205208A1 (en) | 2015-06-15 | 2016-12-22 | S.P.M. Flow Control, Inc. | Full-root-radius-threaded wing nut having increased wall thickness |
| US10677365B2 (en) | 2015-09-04 | 2020-06-09 | S.P.M. Flow Control, Inc. | Pressure relief valve assembly and methods |
| CN108105399B (en) * | 2016-11-25 | 2019-10-15 | 环境保护部核与辐射安全中心 | Trigger device for safety valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB229147A (en) * | 1924-05-03 | 1925-02-19 | Babcock & Wilcox Ltd | Improvements relating to safety valves |
| GB267978A (en) * | 1926-03-20 | 1927-06-23 | Forges Chantiers Mediterranee | Safety valve |
| DE1078837B (en) * | 1956-06-22 | 1960-03-31 | Ludwig Rexroth | Device for maintaining a specified target pressure in hydraulic systems with a pre-control valve and a main valve |
| GB901061A (en) * | 1958-12-02 | 1962-07-11 | Von Roll Ag | Improvements in or relating to safety valves |
| US3083726A (en) * | 1959-09-04 | 1963-04-02 | Cameron Iron Works Inc | High and low pressure responsive cut-off valve |
| FR1263250A (en) * | 1960-04-07 | 1961-06-09 | Zenith Carburateur Soc Du | Safety device for pressurized fluid distribution installation, with a view in particular to protection against ruptured fuel lines |
| GB1116474A (en) * | 1966-06-14 | 1968-06-06 | Exni Instttut Metallorezhuschi | Safety valve |
| US3578019A (en) * | 1968-01-04 | 1971-05-11 | Marco Turolla | Relief valve unit for hydraulic pressure lines |
| US3608580A (en) * | 1969-12-18 | 1971-09-28 | Kelsey Hayes Co | Pilot-operated relief valve |
| US4075928A (en) * | 1974-05-31 | 1978-02-28 | Ross Operating Valve Company | Safety valve for fluid systems |
| US4462420A (en) * | 1982-06-14 | 1984-07-31 | Teledyne Farris Engineering | Safety pressure relief valve |
| US4586533A (en) * | 1985-07-01 | 1986-05-06 | Crosby Valve & Gage Company | Non-flowing modulating pilot operated relief valve |
-
1988
- 1988-03-01 FR FR8802551A patent/FR2613020A1/en active Pending
- 1988-03-02 GB GB08804944A patent/GB2202612A/en not_active Withdrawn
- 1988-03-14 BR BR8801154A patent/BR8801154A/en unknown
- 1988-03-17 AU AU13200/88A patent/AU1320088A/en not_active Abandoned
- 1988-03-18 IT IT47750/88A patent/IT1219508B/en active
- 1988-03-18 CN CN198888101490A patent/CN88101490A/en active Pending
- 1988-03-22 ES ES8800869A patent/ES2006604A6/en not_active Expired
- 1988-03-23 JP JP63067469A patent/JPS63254278A/en active Pending
- 1988-03-23 KR KR1019880003082A patent/KR880011511A/en not_active Application Discontinuation
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100380033C (en) * | 2003-08-19 | 2008-04-09 | 查谦 | Back-pressure balancing minimum pressure valves |
| CN101220881B (en) * | 2007-12-18 | 2010-06-23 | 刘梦真 | Pressure breaking device |
| CN101836020B (en) * | 2008-03-27 | 2012-11-14 | 艾拉斯科普库空气动力股份有限公司 | Minimum pressure valve |
| CN101476564B (en) * | 2009-01-20 | 2010-12-01 | 曹康年 | Security induction valve |
| WO2010124661A1 (en) * | 2009-05-01 | 2010-11-04 | Yang Cong | Pressure regulating device, compressed air supply system and motor vehicle |
| RU2526612C2 (en) * | 2009-05-01 | 2014-08-27 | Янг Конг | Pressure regulation device, compressed air supply system and automotive vehicle |
| CN101839359B (en) * | 2009-11-18 | 2012-01-11 | 南京工程学院 | Variable-difference relief valve |
| CN103223934A (en) * | 2012-01-25 | 2013-07-31 | 株式会社万都 | Pre-fill system to improve brake feel and method of increasing initial flux using the same |
| CN103223934B (en) * | 2012-01-25 | 2015-07-15 | 株式会社万都 | Pre-fill system to improve brake feel and method of increasing initial flux using the same |
| CN103644339A (en) * | 2013-11-25 | 2014-03-19 | 大连元利流体技术有限公司 | Pollution resistant pilot operated relief valve |
| CN106523750A (en) * | 2016-12-26 | 2017-03-22 | 苏州艾尔泰流体控制有限公司 | Pressure relief valve accelerator and pressure relief structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63254278A (en) | 1988-10-20 |
| ES2006604A6 (en) | 1989-05-01 |
| IT8847750A0 (en) | 1988-03-18 |
| BR8801154A (en) | 1988-10-25 |
| FR2613020A1 (en) | 1988-09-30 |
| KR880011511A (en) | 1988-10-28 |
| GB2202612A (en) | 1988-09-28 |
| GB8804944D0 (en) | 1988-03-30 |
| IT1219508B (en) | 1990-05-18 |
| AU1320088A (en) | 1988-09-22 |
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