WO2002075191A1 - Pressure relief device - Google Patents
Pressure relief device Download PDFInfo
- Publication number
- WO2002075191A1 WO2002075191A1 PCT/CA2002/000372 CA0200372W WO02075191A1 WO 2002075191 A1 WO2002075191 A1 WO 2002075191A1 CA 0200372 W CA0200372 W CA 0200372W WO 02075191 A1 WO02075191 A1 WO 02075191A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- pressure relief
- relief device
- inlet
- cavity
- Prior art date
Links
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
Definitions
- the present invention relates to a relief device which may be either thermally or pressure actuated to relieve pressure in pressurized containers when a pre-determined temperature or pressure in or around the container is exceeded.
- Apressure relief device comprising a body including an exterior surface, a cavity, an inlet, an outlet, and an aperture, each of the inlet, the outlet, and the aperture opening into the cavity, a temperature sensitive bonding element, and a valve, disposed within the cavity and extending through the aperture, including a sealing member and a cap, the cap beingjoinedto the exterior of the body by the temperature sensitive bonding element, and the sealing member being configured to seal the inlet when the cap is joined to the exterior surface of the body.
- a pressure relief device comprising a body including an exterior surface, a cavity, an inlet, an outlet, and an aperture, each of the inlet, the outlet, and the aperture opening into the cavity, and a valve, disposed within the cavity and extending through the aperture, including a sealing member and a temperature sensitive cap, the temperature sensitive cap being joined to the exterior of the body and configured to separate from the body above a predetermined temperature, and the sealing member being configured to seal the inlet when the temperature sensitive cap is joined to the exterior surface of the body.
- a pressure relief device comprising a body including a cavity, an inlet, and an outlet, each of the inlet and the outlet opening into the cavity, a first temperature sensitive bonding element, and a valve, disposed within the cavity, including a sealing member, shaft, and a valve bonding element, the shaft including a longitudinal axis and j oining the valve bonding element to the sealing member, the valve bonding element extending laterally outwards from the shaft and including a first valve bonding surface presenting a first planar surface, wherein the axis of the shaft is transverse to the first planar surface, and wherein the first valve bonding surface is joined to a first opposing surface of the body by the first temperature sensitive bonding element, wherein the first opposing surface is interposed between the first valve bonding surface and the valve seat, and wherein the sealing member is configured to seal the inlet when the valve is j oined to the body.
- a pressure relief device comprising a body including an exterior surface, a cavity, an inlet, and an outlet, each of the inlet and the outlet opening into the cavity, a temperature sensitive bonding element, a valve, disposed within the cavity, including a valve retainer and a sealing member, the valve retainer being coupled to the sealing member, the valve retainer being j oined to the body by the temperature sensitive bonding element, and the sealing member being biassed into a sealing relationship with the inlet.
- Fig. 1 is a sectional elevation view of a first embodiment of a pressure relief device of the present invention, in an unactuated condition;
- Fig. 2 is a sectional elevation view of a first embodiment of a pressure relief device of the present invention, in an actuated condition;
- Fig. 3 is a sectional elevation view of a second embodiment of a pressure relief device of the present invention, in an unactuated condition
- Fig. 4 is a third embodiment of a pressure relief device of the present invention, in an unactuated condition;
- Fig. 5 is a detailed sectional elevation view of a cap of the embodiment of the pressure relief device illustrated in Fig. 4;
- Fig. 6 is a sectional elevation view of a fourth embodiment of a pressure relief device of the present invention, in an unactuated condition
- Fig. 7 is a fourth embodiment of a pressure relief device of the present invention, in a temperature actuated condition
- Fig. 8 is a sectional elevation view of a fourth embodiment of a pressure relief device of the present invention, in a pressure actuated condition;
- Fig. 9 is a sectional elevation view of a fifth embodiment of a pressure relief device of the present invention, in an unactuated condition
- Fig. 10 is a fifth embodiment of apressure relief device of the present invention, in a temperature actuated condition
- Fig. 11 is a sectional elevation view of a fifth embodiment of a pressure relief device of the present invention in a pressure actuated condition.
- the present invention provides apressure relief device for venting of gases from a vessel or other container in the event of unacceptably high temperature conditions in the environment immediate to the vessel.
- the present invention provides a pressure relief device 10 comprising a body 12, a temperature sensitive bonding element
- the body 12 includes an exterior surface 18, a cavity 20, an inlet 22, an outlet 24, and an aperture 26. Each of the inlet 22, outlet 24, and aperture 26 open into the cavity.
- the valve 16 is disposed within the cavity 20 and extends through the aperture 26 and is joined to the exterior surface 18 of the ' body 12 by the temperature sensitive bonding element 14.
- the valve 16 includes a sealing member 28 configured to seal the inlet 22 from the outlet 24 by sealingly engaging a valve seat 30 provided at and defining the inlet 32, thereby preventing communication between the inlet 22 and the outlet 24, when the valve 16 is joined to the exterior surface 18 of the body 12.
- the valve 16 includes a cap 32.
- the cap 32 is joined to the exterior surface 18 of the body 12 by the temperature sensitive bonding element 14.
- the cap 32 includes a valve bonding surface 34, and the valve bonding surface 34 is joined to an opposing exterior surface 36 of the body 12 by the temperature sensitive bonding element 14.
- the temperature sensitive element 14 is interposed between the valve bonding surface 34 and the opposing exterior surface 36 of the body 12 to thereby bond the cap 32, and therefore the valve 16, to the exterior surface 18 of the body 12.
- the combination of the cap 32 and the temperature sensitive bonding element 14 functions as a temperature sensitive cap 38 which becomes unsecured relative to, or disengages from the exterior surface 18 of the body 12 above a predetermined temperature.
- valve bonding surface 34 of the pressure relief device 10 embodiment illustrated in Figs. 1 and 2 need not necessarily be planar.
- the valve bonding surface 34 can be curved.
- the temperature sensitive bonding element 14 comprises any material which forms a bond with each of the cap 32 and the body 12 below a predetermined temperature, and which undergoes physical and/or chemical changes above the predetermined temperature to cause weakening of the previously-formed bonds.
- the temperature-sensitive bonding element 14 comprises a low melt alloy or a fusible metal with characteristics to effect bonding with the surfaces of each of the cap 32 and the body 12.
- the temperature sensitive bonding element 14 can be a solder.
- the temperature sensitive bonding element 14 can also comprise a polymer.
- the temperature sensitive bonding element 14 is provided to join the cap 32 to the body 12. In this respect, the temperature sensitive bonding element
- the 14 includes a first surface bonded to the cap 32, and a second surface bonded to the body. Such bonding occurs under lower temperature conditions, such as ambient temperature conditions. At higher temperatures, the bonding between the temperature sensitive bonding element and each of, or either of, the cap 32 and the body 12 becomes weakened, thereby permitting the cap 32 to move away from the body 12, remotely from the inlet
- the valve 16 includes an annular groove 40 carrying the sealing member 28 including an o-ring 42 and a back-up o-ring 44.
- the sealing member 28 is configured to engage the valve seat 30 at the inlet 22, and thereby effect sealing of the inlet 22, and prevent communication between the inlet 22 and the outlet 24, except under abnormal operating conditions (i.e., undesirably high temperature conditions, whenjoinder between the cap 32 and the body 12 by the temperature sensitive bonding element 14 is weakened, and subsequently severed).
- a resilient member 43 such as a spring, can be provided and configured to bias the valve 16 and its sealing member 28 away from the valve seat 30 (i.e., the resilient member 43 biases the valve 16 towards an unseated position in relation to the valve seat 30).
- the resilient member 43 assists unseating of the valve 16 from the valve seat 30 when the cap 32 has become disengaged from the body 12, which is particularly helpful in the event of low pressure conditions in the associated vessel or container.
- the valve 16 is disposed within the cavity 20 and moveable within the cavity 20 upon disengagement of the cap 32 from the exterior surface 18 of the body 12.
- the valve 16 is sealingly disposed within the cavity 20 to prevent communication between the aperture 26 and either of the inlet 22 or the outlet 24.
- the valve 16 is sealingly disposed within the cavity 20 between (i) the inlet 22 and the outlet 24, and (ii) the aperture 26.
- the valve 16 includes a sealing member 46 disposed between (i) the inlet 22 and the outlet 24, and (ii) the aperture 26.
- Such sealing disposition of the valve 16 within the cavity 20 ensures venting of gases from the inlet 22 to the outlet 24 and then to a controlled location.
- the body 12 includes a retainer 48 or abutment configured to prevent the valve 16 from separating from the body 12, once the cap 32 disengages from the exterior surface 18 of the body 12.
- the valve 46 is free to be expelled from the aperture 26 by combined pressure and spring forces, and become a potentially dangerous projectile.
- the retainer 48 is disposed within the cavity 20 and functions as an abutment to physically engage the valve 16 and thereby limit movement of the valve 16 away from the valve seat 30.
- the valve 16 includes a shaft 50 including a longitudinal axis 52.
- the valve 16 is substantially moveable along the longitudinal axis 52 (the valve is either closely spaced apart from the cavity, or is sealingly disposed within the cavity).
- the shaft 50 is interposed between and joins the sealing member 28 to the cap 32.
- the shaft 50 includes a radially enlarged section 54 and first and second sections 56, 58 extending in opposite directions from the radially enlarged section 54.
- the first section 56 extends from the radially enlarged section to the sealing surface 28.
- the second section 58 extends from the radially enlarged section 54 to the cap 32.
- the radially enlarged section 54 includes an operative surface 60 which extends further radially outwards from the longitudinal axis 52 relative to the second section 58.
- the retainer 48 extends from a cavity wall 62 and presents a retainer abutment surface 64 including a transverse axis which is transverse to the operative surface 60 and is configured to interfere with and limit movement of the operative surface 60.
- the retainer 48 further includes a passage 66 within which the second section 58 of the shaft 50 is disposed and extends through to join the cap 32.
- the retainer passage 66 is configured to permit unobstructed movement of the second section 58 of the shaft 50 therethrough.
- the radially enlarged section 54 includes an annular groove 68 carrying the sealing member 46, such as an o-ring.
- the o-ring sealingly engages the cavity wall 62, thereby preventing communication between the aperture 26 and each of the inlet 22 and the outlet 24.
- the resilient member 43 is interposed within the cavity 20 and supported between the radially enlarged section 54 and the valve seat 30 (a shoulder surface provided in the cavity), to thereby urge the valve 16 away from the valve seat 30.
- Figures 1 and 2 illustrate an embodiment of the pressure relief device 10 of the present invention in two conditions.
- Figure 1 illustrates the pressure relief device 10 in an unactuated condition.
- Figure 2 illustrates the pressure relief device 10 in an actuated condition.
- the cap 32 in the unactuated condition, is joined to the exterior surface 18 of the body 12, and the sealing member 28 engages the valve seat 30 and thereby seals the inlet 22 from the outlet 24.
- valve shaft 50 extends through the passage 66 provided in the retainer 48, and the radially enlarged section 54 of the valve shaft 50 is spaced from the retainer 48.
- the pressure relief device 10 has become actuated upon unseating of the sealing member 28 from the valve seat 30. Unseating of the sealing member 28 from the valve seat 30 unseals the inlet 22, thereby effecting communication between the inlet 22 and the outlet 24. Communication between the inlet 22 and the outlet 24 facilitates pressure relief from the inlet 22 and any associated upstream vessel or container. Unseating of the sealing member 28 also necessarily entails movement of the sealing member 28, and therefore the valve 16, away from the valve seat 30. In this respect, upon actuation, the valve 16 moves through the cavity 50 until the radially enlarged section 54 becomes physically engaged to the retainer 48. Once engaged to the retainer 48, further movement of the sealing member 28, and therefore the valve 10, away from the valve seat 30 is prevented.
- Figures 3, 4 and 5 illustrate further embodiments 110, 210 of the pressure relief device of the present invention, similar to the embodiment illustrated in Figures 1 and 2.
- Like reference numerals refer to like elements.
- the bonding arrangements illustrated in the Figures 3, 4 and 5 embodiments can be optionally applied to the Figure 1 and 2 embodiment.
- the pressure relief device 110 in the Figure 3 embodiment is similar to the embodiment of the pressure relief device 10 in Figures 1 and 2 with the exception of the nature of the bonding arrangement of the cap 32 to the body 12.
- the valve bonding surface 134 of the cap 32 presents a planar surface such that the longitudinal axis 52 of the shaft 50 is transverse to the planar surface.
- the longitudinal axis 52 is perpendicular, or substantially perpendicular, to the planar surface presented by the valve bonding surface 34.
- the planar surface is joined to an opposing surface 112 of the body 12 by the temperature sensitive bonding element 14, wherein the opposing surface 112 is interposed between the valve bonding surface 134 and the valve seat 30.
- the pressure relief device 210 in the Figure 4 embodiment is similar to the pressure relief devices 10, 110 in the Figures 1 and 2 embodiment and the Figure 3 embodiment, with the exception of the nature of the bonding arrangement of the cap 32 to the body 12.
- the pressure relief device 210 of the Figure 4 embodiment includes a cap 32 with a first valve bonding surface 212 which presents a planar surface such that the longitudinal axis 52 of the shaft 55 is transverse to the planar surface.
- the longitudinal axis 52 is perpendicular, or substantially perpendicular, to the planar surface presented by the first valve bonding surface212.
- Theplanar surface is joined to an opposing first bonding surface 214 ofthe body 12 by a first temperature sensitive bonding element 216, wherein the first bonding surface 214 is interposed between the first valve bonding surface 212 and the valve seat 30.
- the shaft 50 ofthe valve 16 presents a second valve bonding surface 218 presenting a planar surface joined to an opposing second bonding surface 220 within the cavity ofthe body by a second temperature sensitive bonding element.222.
- the second valve bonding surface 218 includes a transverse axis which is transverse to the planar surface ofthe first valve bonding surface 212.
- the shaft 50 of the valve 16 is subject to pressure and spring forces which act on the cap 16 in a direction which urges the cap 32 to separate from the body 12. Such forces could potentially weaken and compromise the bonding between the temperature sensitive element 14 and each of, or either of, the cap 32 and the body 12.
- the bonding which would initially be weakened would be that nearest to the shaft 50.
- the shaft 50 is bonded to the body 12 to further distribute the forces being applied by the shaft 50.
- Figures 6, 7 and 8 illustrate a further embodiment ofthe pressure relief device of the present invention in unactuated ( Figure 6) temperature actuated ( Figure 7), and pressure actuated ( Figure 8) conditions.
- the pressure relief device in the Figures 6, 7 and 8 illustrate a further embodiment ofthe pressure relief device of the present invention in unactuated ( Figure 6) temperature actuated ( Figure 7), and pressure actuated ( Figure 8) conditions.
- a pressure relief device 310 comprising a body 312, a temperature sensitive bonding element 314, and a valve 316.
- the body 312 includes a cavity 318, an inlet 320, an outlet 322, wherein each ofthe inlet
- the valve 316 is disposed within the cavity 318 and includes a valve retainer 324 and a piston 326.
- the valve retainer 324 is joined to the body 312 by the temperature sensitive bonding element 314.
- the piston 326 includes a sealing member 328 configured to engage a valve seat 330 provided at, and defining, the inlet 320, thereby sealing the inlet 320 from communication with the outlet
- the valve 316 also includes a resilient member 332, such as a spring, interposed between, supported by, and coupled to each ofthe piston 326 and the valve retainer 324.
- a resilient member 332 such as a spring, interposed between, supported by, and coupled to each ofthe piston 326 and the valve retainer 324.
- the piston 326 is biassed or urged into sealing engagement with the valve seat 330 while also being coupled to the valve retainer 324.
- the resilient member 332 also biases or urges the valve retainer 324 away from the valve seat 322.
- the piston 326 carries the sealing member 328.
- the sealing member 328 is configured to engage the valve seat 330 at the inlet 320, and thereby effect sealing ofthe inlet 320, and prevent communication between the inlet 320 and the outlet 322, except under abnormal operating conditions (ie. undesirably high temperature conditions, when joinder between the valve retainer 324 and the body 312 by the temperature sensitive bonding element 314 is weakened, and subsequently severed, or high pressure conditions which effect unseating ofthe piston 326 from the valve seat 330).
- abnormal operating conditions ie. undesirably high temperature conditions, when joinder between the valve retainer 324 and the body 312 by the temperature sensitive bonding element 314 is weakened, and subsequently severed, or high pressure conditions which effect unseating ofthe piston 326 from the valve seat 330.
- the temperature sensitive bonding element 314 comprises any material which forms a bond with each ofthe cap and the body below a predetermined temperature, and which undergoes physical and/or chemical changes above the predetermined temperature to cause weakening of the previously-formed bonds.
- the temperature-sensitive bonding element comprises a low melt alloy or a fusible metal with characteristics to effect bonding with the surfaces of each ofthe valve retainer 324 and the body 312.
- the temperature-sensitive bonding element 314 comprises solder.
- the temperature-sensitive bonding element 314 can also comprise a polymer.
- the temperature sensitive bonding element 314 is provided to j oin the valve retainer 324 to the body 312.
- the temperature sensitive bonding element 314 includes a first surface bonded to the valve retainer 324 , and a second surface bonded to the body 312. Such bonding occurs under lower temperature conditions, such as ambient temperature conditions. At higher temperatures, the bonding between the temperature sensitive bonding element and each of, or either of, the valve retainer 324 and the body
- valve retainer 324 becomes weakened, thereby permitting the valve retainer 324 to move away from the body 312, remotely from the inlet, upon application of external forces to the valve 324.
- the valve 316 is disposed within the cavity 318.
- the valve retainer 324 is joined to. the wall 334 of the cavity 318.
- the cavity 318 is configured with sufficient space to receive and retain the valve 316 once actuated in the manner described below.
- the valve retainer 324 comprises an axially extending collar, which is joined along its length to the wall 334 of the cavity 318 by the temperature sensitive bonding element 314 interposed therebetween.
- the pressure relief device 310 can also be actuated (see Figure 8).
- the pre-set compressive forces exerted by the resilient member 332 will be exceeded by the pressure at the inlet 320.
- the increased pressure will unseat the piston 326 and cause opening of the inlet 320.
- communication between the inlet 320 and outlet 322 will be effected, thereby facilitating pressure relief from the inlet 320 (and associated vessel or container).
- the removal ofthe abnormal pressure conditions at the inlet 320 will permit the piston 324 to return to a seated position against the valve seat 330, thereby permitting re-use ofthe pressure relief device 310.
- gases will flow from the inlet 320 to the outlet 322, and gas pressure will be reduced at the inlet 320 as gaseous inventory in the associated vessel or container becomes depleted.
- FIGS 9, 10, and 11 illustrate a further embodiment ofthe pressure relief device of the present invention, similar to the embodiment illustrated in Figures 6, 7, and 8. Like reference numerals refer to like elements.
- the pressure relief device 410 in the Figures 9, 10, and 11 embodiment is similar to the embodiment ofthe pressure relief device in Figures 6, 7, and 8 with the exception of the nature of the bonding arrangement of the retainer 324 to the body 312. hi the
- the valve 316 includes a valve retainer 324 which is joined to the exterior surface 340 ofthe body 312.
- the valve retainer 324 includes a cap 342.
- the cap 342 is joined to the exterior surface 340 ofthe body 312 with a temperature sensitive bonding element 314.
- the bonding arrangement illustrated in the Figures 3 and 4 embodiments can be optionally applied to the Figures 9, 10, and
- the body 312 further includes an aperture 344 defined by the exterior surface 340 ofthe body 312.
- the valve 316 extends through the aperture 344 such that the cap 342 is joined to the exterior surface 340 by the temperature sensitive bonding element 314.
- the cap 342 includes a valve bonding surface 346, and the valve bonding surface 346 is joined to an opposing exterior surface 348 ofthe body 312 by the temperature sensitive bonding element 314.
- the temperature sensitive element 314 is interposed between the valve bonding surface 346 and the opposing exterior surface 348 ofthe body 312 to thereby bond the cap 342, and therefore the valve 316, to the exterior surface 340 of the body 312.
- the valve 316 is disposed within the cavity 318 and moveable within the cavity 318 upon disengagement ofthe cap 342 from the exterior surface 340 ofthe body 312.
- the valve 316 is sealingly disposed within the cavity 318 to prevent communication between the aperture 344 and either ofthe inlet 320 or the outlet 322.
- the valve 316 is sealingly disposed within the cavity 318 between (i) the inlet 320 and the outlet 322, and (ii) the aperture 326.
- the valve 316 includes a sealing member 328 disposed between (i) the inlet 320 and the outlet 322, and (ii) the aperture 326.
- the body 312 includes a body abutment 350 configured to prevent the valve 316, and particularly the valve retainer 324, from separating from the body 312, once the cap 342 disengages from the exterior surface 340 ofthe body 312. Without such an abutment 350, the valve 316, or at least the valve retainer 324, is free to be expelled from the opening by combined pressure and spring forces, and become a potentially dangerous projectile.
- the body abutment 350 is disposed within the cavity 318 and functions to physically engage the valve 316 and thereby limit movement ofthe valve 316 away from the valve seat 330.
- the valve retainer 324 includes a radially enlarged section 352 and a shaft 354.
- the shaft 354 extends from the radially enlarged section 352 and joins the cap 342 to the radially enlarged section 352.
- the valve 354 includes a longitudinal axis 356.
- the valve 316 is substantially moveable along the longitudinal axis 356 (the valve 316 is either closely spaced apart from the wall 334 of the cavity 318, or is sealingly disposed within the cavity 318, throughout its distance of travel).
- the radially enlarged section 352 includes an operative surface 358 which extends further radially outwards from the longitudinal axis 356 relative to the shaft section 354.
- the abutment 350 extends from the cavity wall 334 and presents an abutment surface 360 including a transverse axis which is transverse to the operative surface 358 and is configured to interfere with and limit movement of the operative surface 358.
- the abutment 350 further includes apassage 362 within which the shaft 354 of the valve retainer 324 is disposed and extends through to join the cap 342.
- the passage 362 is configured to permit unobstructed movement ofthe shaft 354 ofthe valve retainer 324 therethrough.
- the radially enlarged section 352 includes an annular groove 364 carrying a sealing member 366, such as an o-ring.
- the o-ring sealingly engages the cavity wall 334, thereby preventing communication between the aperture 344 and each ofthe inlet 320 and the outlet 322.
- the resilient member 332 is interposed between, coupled to, and supported by each ofthe radially enlarged section 352 ofthe valve retainer 324 and the piston 326.
- the valve retainer also includes a recess 368 for receiving the piston 326 when the piston 326 becomes unseated from the valve seat 330 during high pressure conditions, as described below.
- the recess 368 is axially aligned with the piston 324. hi the embodiment illustrated, the recess 368 is provided in the radially enlarged section 352 ofthe valve retainer 324.
- the temperature sensitive bonding element 314 remains bonded to each ofthe cap 342 and the exterior surface 340 of the body 312. Forces exerted by the resilient member 332 upon the piston 326 are sufficient to overcome any opposing forces exerted by the gas pressure at the inlet 320.
- the sealing surface 328 ofthe piston 326 remains seated against the valve seat 330, thereby sealing the inlet 320 and preventing any communication between the inlet 320 (i.e., from the vessel or storage container) and the outlet 322. If, however, temperature conditions exceed a maximum predetermined value (see
- the relief device 410 will also be actuated ( Figure 10).
- the pre-set compressive forces exerted by the resilient member 332 will be exceeded by the pressure at the inlet 320.
- the increased pressure will unseat the piston 326 and cause the piston 326 to move into the annular recess 368 of the valve retainer 324.
- communication between the inlet 320 and outlet 322 will be effected, thereby facilitating pressure relief from the inlet 320 (and corresponding vessel or container).
- the removal ofthe abnormal pressure conditions at the inlet 320 will permit the piston 326 to return to a seated position against the valve seat 330, thereby permitting reuse of the pressure relief device 410.
- gases will flow from the inlet 320 to the outlet 322, and gas pressure will be reduced at the inlet 320 as gaseous inventory in the associated vessel or container becomes depleted.
- the compressive forces ofthe resilient member 332 will again be sufficient to cause the piston 326 and its sealing member 328 to sealingly engage the valve seat 330 and seal the inlet 320.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Valve Housings (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02704534A EP1370789A1 (en) | 2001-03-20 | 2002-03-20 | Pressure relief device |
CA002436210A CA2436210A1 (en) | 2001-03-20 | 2002-03-20 | Pressure relief device |
US10/141,974 US6814097B2 (en) | 2001-03-20 | 2002-05-10 | Pressure relief device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2,341,334 | 2001-03-20 | ||
CA 2341334 CA2341334A1 (en) | 2001-03-20 | 2001-03-20 | Pressure relief device |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/141,974 Continuation US6814097B2 (en) | 2001-03-20 | 2002-05-10 | Pressure relief device |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002075191A1 true WO2002075191A1 (en) | 2002-09-26 |
WO2002075191B1 WO2002075191B1 (en) | 2003-01-16 |
Family
ID=4168651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2002/000372 WO2002075191A1 (en) | 2001-03-20 | 2002-03-20 | Pressure relief device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1370789A1 (en) |
CA (1) | CA2341334A1 (en) |
WO (1) | WO2002075191A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1418372A1 (en) * | 2002-11-08 | 2004-05-12 | Luxembourg Patent Company S.A. | Thermally activated relief valve |
US6814097B2 (en) | 2001-03-20 | 2004-11-09 | Teleflex Gfi Control Systems L.P. | Pressure relief device |
EP3828449A1 (en) * | 2019-11-27 | 2021-06-02 | SCHAKO Klima Luft Ferdinand Schad KG | Device for releasing an actuating element |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1068645A (en) * | 1965-02-22 | 1967-05-10 | Gas Council | Improvements relating to cut-off valves |
US4744383A (en) | 1987-04-29 | 1988-05-17 | Aluminum Company Of America | Thermally activated valve |
US4744382A (en) | 1987-04-29 | 1988-05-17 | Aluminum Company Of America | Combination thermal or pressure activated relief valve |
US5632297A (en) | 1995-09-26 | 1997-05-27 | Amcast Industrial Corporation | Piston-type thermally or pressure activated relief device |
US5791367A (en) * | 1996-01-25 | 1998-08-11 | Gas Research Institute | Pressure relief device |
FR2780477A1 (en) * | 1998-06-26 | 1999-12-31 | Thomson Marconi Sonar Sas | Obturator for remote controlled fluid vent |
US6125872A (en) * | 1998-11-10 | 2000-10-03 | Westinghouse Air Brake Company | Temperature activated diversion valve |
JP2000310346A (en) * | 1999-04-23 | 2000-11-07 | Masayuki Takahashi | Temperature limited safety relief valve for hot water supply device |
-
2001
- 2001-03-20 CA CA 2341334 patent/CA2341334A1/en not_active Abandoned
-
2002
- 2002-03-20 WO PCT/CA2002/000372 patent/WO2002075191A1/en not_active Application Discontinuation
- 2002-03-20 EP EP02704534A patent/EP1370789A1/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1068645A (en) * | 1965-02-22 | 1967-05-10 | Gas Council | Improvements relating to cut-off valves |
US4744383A (en) | 1987-04-29 | 1988-05-17 | Aluminum Company Of America | Thermally activated valve |
US4744382A (en) | 1987-04-29 | 1988-05-17 | Aluminum Company Of America | Combination thermal or pressure activated relief valve |
US5632297A (en) | 1995-09-26 | 1997-05-27 | Amcast Industrial Corporation | Piston-type thermally or pressure activated relief device |
US5791367A (en) * | 1996-01-25 | 1998-08-11 | Gas Research Institute | Pressure relief device |
FR2780477A1 (en) * | 1998-06-26 | 1999-12-31 | Thomson Marconi Sonar Sas | Obturator for remote controlled fluid vent |
US6125872A (en) * | 1998-11-10 | 2000-10-03 | Westinghouse Air Brake Company | Temperature activated diversion valve |
JP2000310346A (en) * | 1999-04-23 | 2000-11-07 | Masayuki Takahashi | Temperature limited safety relief valve for hot water supply device |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 14 5 March 2001 (2001-03-05) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6814097B2 (en) | 2001-03-20 | 2004-11-09 | Teleflex Gfi Control Systems L.P. | Pressure relief device |
EP1418372A1 (en) * | 2002-11-08 | 2004-05-12 | Luxembourg Patent Company S.A. | Thermally activated relief valve |
EP3828449A1 (en) * | 2019-11-27 | 2021-06-02 | SCHAKO Klima Luft Ferdinand Schad KG | Device for releasing an actuating element |
Also Published As
Publication number | Publication date |
---|---|
CA2341334A1 (en) | 2002-09-20 |
EP1370789A1 (en) | 2003-12-17 |
WO2002075191B1 (en) | 2003-01-16 |
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