Valve assembly mounting structure

Abstract

A valve arrangement has a support surface and a flexible anti-rotation member to secure the valve arrangement at a wall of an enclosure. The support surface supports the valve arrangement against an interior surface of the enclosure during a high-pressure event. The valve arrangement has a twist-to-lock attachment mechanism. The anti-rotation mechanism inhibits rotation of the valve arrangement in a release direction. The anti-rotation mechanism can be formed monolithically with the valve body or as a separate piece. For example, the anti-rotation mechanism can be formed as part of a particle arrester that mounts to the valve body.

Description

Attorney Docket No. 15720.1141W0U1VALVE ASSEMBLY MOUNTING STRUCTURECROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of Indian Provisional Application No. 202411067591, filed September 6, 2024, the disclosure of which is incorporated by reference in its entirety.BACKGROUND

[0002] An enclosure, such as a battery case enclosing a battery, may have a need to passively vent various gasses over the lifetime of the battery. Current battery ventilation modules may use a seal and seat within the device. Additionally, a battery case may be subject to an overpressure scenario in which the battery causes the pressure in the battery case to rise above a safe level, which may result in damage to or rupture of the battery case. Further, during an overpressure scenario, relief fluids may come into contact with a membrane or element which facilitates the ventilation; the composition of the relief fluids may be damaging to the materials of the membrane.SUMMARY

[0003] A valve arrangement mounts to an enclosure to enable the flow of fluids between an interior of the enclosure and an exterior of the enclosure. Some types of valve arrangements enable venting flow of the fluid. Other types of valve arrangements enable selective flow of the fluid during a high-pressure event within the enclosure (e.g., thermal runaway). Other types of valve arrangements enable selective flow of the fluid during a leak check being performed on the enclosure. In certain implementations, the valve arrangement is configured to enable some combination of venting, thermal runaway protection, and / or leak check functionality.

[0004] A valve body of the valve arrangement defines an insert portion configured to be inserted through an aperture defined in a wall of the enclosure. The insert portion of the valve body carries a support surface facing towards the second end of the valve body. An antirotation member is disposed between the support surface and an exterior end of the valve body. The anti-rotation member being flexible between an undeflected position and a deflected position.

[0005] In some implementations, the anti-rotation member is formed monolithically with the valve body. In other implementations, the anti-rotation member is formed on a particle arrester that is separately mounted to the valve body.Attorney Docket No. 15720.1141W0U1

[0006] In some implementations, the anti -rotation member includes a latch finger. In other implementations, the anti-rotation member has a wedge shape.

[0007] A variety of additional inventive aspects will be set forth in the description that follows. The inventive aspects can relate to individual features and to combinations of features. It is to be understood that both the forgoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the broad inventive concepts upon which the embodiments disclosed herein are based.BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings, which are incorporated in and constitute a part of the description, illustrate several aspects of the present disclosure. A brief description of the drawings is as follows:

[0009] FIG. 1 is a top perspective view of an example valve arrangement configured in accordance with the principles of the present disclosure.

[0010] FIG. 2 is a bottom perspective view of a first example implementation of the valve arrangement of FIG. 1 having a first type of flexible anti-rotation member.

[0011] FIG. 3 is a plan view of an example aperture defined through an enclosure wall to receive the valve arrangement of FIG. 2.

[0012] FIG. 4 shows the flexible anti-rotation member of FIG. 2 relative to a support surface of the valve body.

[0013] FIG. 5 is a cross-sectional view of a valve body of the valve arrangement of FIG. 2 with only a latch hook of the anti-rotation feature visible.

[0014] FIG. 6 is an enlarged view of the anti-rotation member of FIG. 4 latched into a notch defined in the enclosure wall.

[0015] FIG. 7 is a bottom perspective view of a second example implementation of the valve arrangement of FIG. 1 having a second type of flexible anti-rotation member.

[0016] FIG. 8 is a plan view of another example aperture defined through an enclosure wall to receive the valve arrangement of FIG. 7 or the valve arrangement of FIG. 12.

[0017] FIG. 9 shows the flexible anti-rotation member of FIG. 7 relative to a support surface of the valve body.

[0018] FIG. 10 shows the valve arrangement of FIG. 7 assembled at the enclosure and oriented in the locked rotational orientation.Attorney Docket No. 15720.1141W0U1

[0019] FIG. 11 shows an alternative design for the anti-rotation member of FIG. 7 allowing removal of the valve arrangement from the enclosure upon the application of a breakaway force.

[0020] FIG. 12 is a bottom perspective view of a third example implementation of the valve arrangement of FIG. 1 having a third type of flexible anti -rotation member carried by a separate particle arrester.

[0021] FIG. 13 shows a valve body of the valve arrangement of FIG. 12.

[0022] FIG. 14 is a top perspective view of the particle arrester of FIG. 12.

[0023] FIG. 15 is a bottom perspective view of the particle arrester of FIG. 12.

[0024] FIG. 16 is a top plan view of the particle arrester of FIG. 12 mounted at the enclosure aperture in an initial rotational position, wherein a remainder of the valve arrangement is hidden for ease in viewing the particle arrester.

[0025] FIG. 17 is a perspective view of the particle arrester and enclosure wall of FIG. 16.

[0026] FIG. 18 is a top plan view of the particle arrester of FIG. 12 mounted at the enclosure aperture in a locked rotational position, wherein a remainder of the valve arrangement is hidden for ease in viewing the particle arrester.

[0027] FIG. 19 is a perspective view of the particle arrester and enclosure wall of FIG. 18.

[0028] FIG. 20 is a bottom perspective view of the valve arrangement of FIG. 12 mounted at the enclosure aperture in a locked rotational position.DETAILED DESCRIPTION

[0029] Reference will now be made in detail to exemplary aspects of the present disclosure that are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0030] FIG. 1 shows a valve arrangement 100, 150, 152 configured to mount to an enclosure 102 at an aperture 104. The valve arrangement 100 includes a valve body 106 extending along an axis L between a first end 108 and a second end 110. The valve body 106 defines a passage 112 extending between a port 114 at the first end 108 and windows 116 at the second end 110. The valve body 106 defines a sealing portion 118 and an insert portion 120. The insert portion 120 extends from the sealing portion 118 to the first end 108 of the valve body 106.

[0031] A valve arrangement mounts to an enclosure to enable the flow of fluids between an interior of the enclosure and an exterior of the enclosure. Some types of valve arrangements enable venting flow of the fluid. Other types of valve arrangements enable selective flow ofAttorney Docket No. 15720.1141W0U1 the fluid during a high-pressure event within the enclosure (e.g., thermal runaway). Other types of valve arrangements enable selective flow of the fluid during a leak check being performed on the enclosure. In certain implementations, the valve arrangement is configured to enable some combination of venting, thermal runaway protection, and / or leak check functionality. Examples of such valve arrangements are disclosed in WO 2023 / 237234, the disclosure of which is hereby incorporated herein by reference in its entirety.

[0032] The valve assembly 100 is configured to secure to the enclosure 102 using a twist- to-lock connection. In certain implementations, a mounting arrangement 122 is disposed at the insert portion 120. The mounting arrangement 122 includes a support surface 124 disposed at the insert portion 120. The support surface 124 faces towards the second end 110 of the valve body 106. The mounting arrangement 122 also includes a ramped surface 126 disposed at the insert portion 120. The ramped surface 126 leads to the support surface 124. A stop 128 may be disposed at an opposite side of the support surface 124 from the ramped surface 126.

[0033] The valve arrangement 100, 150, 152 also includes an anti-rotation member 130, 160, 170 that allows rotation of the valve body 106 relative to the enclosure 102 in a first rotational direction. The anti-rotation member 130, 160, 170 inhibits rotation of the valve body 106 relative to the enclosure 102 in an opposite second rotational direction when the valve body 106 reaches a predetermined rotational position (e.g., a locked rotational position) relative to the enclosure 102. For example, the anti-rotation member 130, 160, 170 may snap into engagement with a catch surface 142 of the opening 104 when the valve body 106 reaches the predetermined rotational position. The anti-rotation member 130, 160, 170 includes a flexible body 132, 162, 172 that is offset at a gap G from the support surface 124 towards the second end 110 of the valve body 106 (e.g., see FIG. 4). In certain examples, the body 132, 162, 172 enables a free end 134, 164, 174 of the anti-rotation member 130, 160, 170 to move between an undeflected position and a deflected position.

[0034] When the valve assembly 100 is mounted at the enclosure 102, the insert portion 120 is inserted through the aperture 104 while the valve body 106 is oriented in an initial rotational position. Once inserted, the sealing portion 118 of the valve body 106 seats on an exterior surface of a wall 140 of the enclosure 102. An edge 144 of the wall 140 aligns with the gap G between the support surface 124 and the anti-rotation member 130. The valve assembly 100 is then twisted about the axis L in the first rotational direction from the initial rotational position towards a locked rotational position. During the twisting, the wall 140 of the enclosure 102 slides over the support surface 124 of the mounting arrangement 122. In certain examples, the valve assembly 100 is twisted until the edge 144 of the wall 140 abutsAttorney Docket No. 15720.1141W0U1 the stop 128. In certain examples, the valve assembly 100 is twisted until the anti-rotation member 130, 160, 170 engages a catch surface 146. In certain examples, the ramped surface 126 may assist in guiding the wall 140 to the support surface 124 during the twisting motion. In certain implementations, the anti-rotation member 130, 160, 170 is transitioned to the deflected position by the wall 140 (e.g., by the edge 144 of the wall 140) and then snaps into engagement with the catch surface 144 to inhibit movement of the valve body 106 in the second rotational direction. Engagement between the support surface 124 and an inner surface of the wall 140 inhibits pulling the valve body 106 away from the enclosure 102.

[0035] In certain implementations, the wall 140 of the enclosure 102 includes a tab 142 that extends into the aperture 104 (e.g., see FIGS. 3 and 8). When the valve body 106 is initially inserted through the hole 104, the mounting arrangement 122 passes through circumferential gaps between the tabs 142. An edge 144 of a tab 142 aligns with the gap G of a respective mounting arrangement 122. During twisting of the valve body 106, the edge 144 passes through the gap G until the edge 144 abuts or faces the stop 128. The anti-rotation member 130, 160, 170 snaps over the tab 142 or a portion of the tab 142 and engages a catch surface 146. In certain examples, the aperture 104 defines one or more notches 148 or detents that cooperate with detents 149 (FIG. 7) or notches on the valve body 106 to form a poka-yoke mechanism for inserting the valve arrangement 100.

[0036] FIGS. 2-6 illustrate a first example implementation of a mounting arrangement 122A including an anti-rotation member 130 formed by the valve body 106. The anti-rotation member 130 is aligned with the support surface 124 along the axis L. In certain examples, the free end 134 of the anti-rotation member 130 is circumferentially offset from the ramped surface 126 and disposed above the support surface 124. In certain examples, the flexible body 132 of the anti-rotation member 130 extends parallel with the support surface 124 when the free end 134 is disposed in the undeflected position. In certain examples, the free end 134 of the anti-rotation member 130 forms a latch hook having a catch surface 136 facing towards the stop 128. In certain examples, the free end 134 of the anti-rotation member 130 defines a ramped or otherwise contoured surface 138 that faces at least partially away from the stop 128.

[0037] In certain examples, the catch surfaces 146 at the aperture 104 of the enclosure 102 are offset from the edges 144 of the tabs 142 (e.g., see FIG. 3). For example, the catch surface 146 may be formed at a notch 145 in the tab 142. Accordingly, when the valve body 106 is twisted relative to the enclosure 102, the ramped surface 138 of the free end 134 of the antirotation member 130 rides over the edge 144 of a tab 142 at the aperture 104, thereby transitioning the free end 134 to the deflected position. The free end 134 rides over an exteriorAttorney Docket No. 15720.1141W0U1 surface of the tab 142 as the valve body 106 continues twisting relative to the enclosure 102 until the free end 134 aligns with the notch 145. The free end 134 drops into the notch 145 so that the catch surface 136 of the anti -rotation member 130 engages the catch surface 146 of the enclosure 102, thereby inhibiting rotation of the valve body 106 away from the locked rotational position.

[0038] FIGS. 7-11 illustrate a second example implementation of a mounting arrangement 122B including an anti-rotation member 160 formed by the valve body 106. The anti-rotation member 160 is laterally offset from the support surface 124 (e.g., along a circumference of the valve body 106). In certain examples, the free end 164 of the anti -rotation member 160 aligns with an edge of the ramped surface 126. In certain examples, the free end 164 of the antirotation member 160 is laterally offset from the ramped surface 126. In certain examples, the flexible body 162 of the anti-rotation member 160 extends parallel with the support surface 124 when the free end 164 is disposed in the undeflected position. In certain examples, the body 162 of the anti-rotation member 160 has a wedge shape tapering down to the free end 164. The free end 164 has a shoulder defining the catch surface 166.

[0039] In certain examples, the catch surfaces 146 at the aperture 104 of the enclosure 102 is defined by the edge 144 of the tab 142 (e.g., see FIG. 8). The catch surface 166 of the antirotation member 160 faces the catch surface 146 of the tab 142 when the free end 164 of the anti-rotation member 160 snaps over the edge 144 of the tab 142 during rotation of the valve body 106 relative to the enclosure 102 (e.g., see FIG. 10). In certain examples, a bottom of the flexible body 162 defines the ramped or otherwise contoured surface 168 that faces at least partially away from the stop 128. The ramped surface 168 may facilitate rotation of the valve body 106 and anti-rotation member 160 relative to the wall 140.

[0040] In certain implementations, the anti -rotation member 160 is configured to inhibit rotation of the valve body 106 in the second rotational direction absent an application of a break-away force. For example, in certain examples, the anti-rotation member 160 includes a second ramped or otherwise contoured surface 169 facing at least partially towards the stop 128. Upon an application of the break-away force, the second ramped surface 169 allows the free end 164 of the anti -rotation member 160 to ride over the edge 144 of the tab 142, thereby enable rotation of the valve body 106 in the second rotational direction relative to the enclosure 102. The catch surface 166 inhibits unintentional rotation in the second rotational direction (e.g., due to vibration) while the second ramped surface 169 allows intentional rotation in the second rotational direction (e.g., to remove the valve arrangement 150 from the enclosure 102).Attorney Docket No. 15720.1141W0U1

[0041] FIGS. 12-21 illustrate a third example implementation of a mounting arrangement 122C including an anti-rotation member 170 formed by a particle arrester 180. The particle arrester 180 is a separate piece from the valve body 106. In certain implementations, the particle arrester 180 is formed of a different material from the valve body 106. In certain examples, the particle arrester 180 is formed of a more thermally durable material than the valve body 106. In certain examples, the particle arrester 180 is formed of a more flexible material than the valve body 106. For example, the particle arrester 180 can be formed of metal while the valve body 106 is formed of plastic.

[0042] The particle arrester 180 includes a patterned surface 182 that extends across the port 114 at the first end 108 of the valve body 106 when the particle arrester 180 is assembled on the valve body 106. The patterned surface 182 provides one or more apertures aligned with the port 114 to enable fluid to pass between an interior of the enclosure 102 and the passage 112 of the valve body 106 through the port 114. In some examples, the apertures include regularly spaced perforations (e.g., circular perforations). In other examples, the apertures include elongated slots. In some examples, the elongated slots extend in parallel to each other. In other examples, the elongated slots extend in rings (e.g., interrupted rings). Other configurations are possible.

[0043] One or more side walls 184 extend upwardly from the patterned surface 182. When the particle arrester 180 is mounted at the valve body 106, the side walls 184 extend over external sides of the insert portion 120 of the valve body 106. When the valve arrangement 152 is mounted at the aperture 104 of the enclosure 102, the side wall(s) 184 extend through the aperture 104 from the patterned surface 182 within an interior of the enclosure 102 to an exterior of the enclosure 102. In certain examples, the side walls 184 have indented portions 188 that are recessed inwardly from a remainder of the side walls 184. In certain examples, the indented portions 188 are configured to extend circumferentially between the mounting arrangements 122C of the valve body 106 (e.g., see FIG. 12).

[0044] In certain implementations, the particle arrester 180 includes one or more latch fingers 190 configured to retain the particle arrester 180 at the insert portion 120 of the valve body 106 while the valve arrangement 152 is not mounted at the enclosure 102. For example, the one or more latch fingers 190 may engage (e.g., snap into) respective apertures 121 (e.g., see FIG. 13) defined in the valve body 106 at the insert portion 120 (e.g., see FIG. 12). In certain examples, the latch fingers 190 are defined by the indented portions 188 of the side walls 184. Accordingly, the particle arrester 180 and latch body 106 can be handled and installed at the enclosure 102 as a unit.Attorney Docket No. 15720.1141W0U1

[0045] One or more radial flanges 186 extend outwardly from the side walls 184 at opposite ends of the side walls 184 from the patterned surface 182. In certain examples, the radial flanges 186 extend outwardly from the indented portions 188 of the side walls 184. When the valve arrangement 152 is mounted at the enclosure 102, the radial flanges 186 extend over an exterior surface of the wall 140 of the enclosure 102. In certain examples, the radial flanges 186 support the particle arrester 180 at the aperture 104 of the enclosure wall 140 even without the valve body 106. In certain examples, the radial flanges 186 of the particle arrester 180 support or assist in supporting the valve body 106 at the aperture 104 of the enclosure 102.

[0046] In certain examples, the non-indented sections of the side walls 184 slide beneath the enclosure wall 140 during installation of the valve arrangement 152 (e.g., during rotation from the initial rotational position to the locked rotational position). The upper edge of the non-indented side walls 184 can provide support against the interior of the enclosure wall 140 when pressure is applied to the particle arrester 180 from within the enclosure 102. Accordingly, the patterned surface 182 of the particle arrester 180 will remain extending across the enclosure aperture 104 even if the valve body 106 melts or is otherwise damaged or destroyed by excessive heat during thermal runaway or other high-pressure event. Engagement between the radial flange(s) 186 and an exterior of the wall 140 inhibits the patterned surface 182 from falling further into the interior of the enclosure 102. Engagement between the interior of the wall 142 and the edges of the non-indented side walls 184 inhibit the patterned surface 182 from passing through the aperture 104 to the exterior of the enclosure.

[0047] In certain implementations, the anti-rotation members 170 are carried by the radial flanges 186. For example, each anti-rotation member 170 is carried by a respective one of the radial flanges 186. Accordingly, the anti-rotation member 170 will remain even if the valve body 106 is damaged and will continue to inhibit rotation. The anti-rotation members 170 inhibit the particle arrester 180 from rotating relative to the enclosure 102, thereby maintaining the non-indented side walls 184 of the particle arrester 180 beneath the enclosure wall 140 to maintain the patterned surface 182 of the particle arrester 180 at the enclosure aperture 104 even after the valve body 106 is damaged or destroyed.

[0048] In certain implementations, an anti-rotation member 170 includes a flexible body 172 cantilevered off the radial flange 188 to define a first ramped or contoured surface 178 extending at least partially towards the patterned surface 182. The anti-rotation member 170 defines a second ramped or contoured surface 179 at an end of the first ramped or contoured surface 178. The second ramped or contoured surface 179 extends at least partially away from the patterned surface 182 to an edge. In certain examples, the transition between the first andAttorney Docket No. 15720.1141W0U1 second ramped or contoured surfaces 178, 179 is disposed at the free end 174 of the antirotation member 170. In certain examples, the second ramped or contoured surface 179 defines the catch surface 176 of the anti-rotation member 170.

[0049] As shown in FIGS. 16-19, the valve arrangement 152 with the particle arrester 180 is inserted into the aperture 104 of the enclosure 102 in an initial rotational position (e.g., see FIGS. 16 and 17). In certain examples, the particle arrester 180 includes a poka-yoke feature (e.g., detent 196) that fits within notch 148 of the enclosure 102 when the particle arrester 180 is oriented in the initial rotational orientation. The radial flanges 186 extend over an external surface of the enclosure 102 to support the particle arrester 180. In certain implementations, the anti-rotation members 170 seat on the tabs 142 of the wall 140 of the enclosure 102. In certain examples, the anti-rotation members 170 are moved to their deflected positions by the tabs 142 when the particle arrester 180 is inserted into the opening 104.

[0050] As the valve arrangement 152 is rotated about the axis L towards the locked position, the tab 142 of the enclosure 102 slides within the gap G between the support surface 124 and the free end 174 of the anti-rotation member 170. Accordingly, the tab 142 is disposed between the support surface 124 and the second end 110 of the valve body 110. In some examples, the valve arrangement 152 rotates until the edge 144 of the tab 142 engages the stop 128 of the valve body 106. In other examples, the valve arrangement 152 rotates until the free end 174 of the anti-rotation member 170 slides over the tab 142 until the free end 174 snaps over the edge 144 of the tab 142. When the valve arrangement 152 is disposed in the locked rotational position, the catch surface 176 of the anti -rotation member 170 faces the catch surface 146 defined by the edge 144 of the tab 142. The catch surface 176 of the anti-rotation member 170 inhibits rotation in the second rotational direction of the particle arrester 180, and hence of the valve body 106, relative to the enclosure 102. In certain implementations, the second ramped or contoured surface 179 enables rotation in the second rotational direction, however, upon the application of a break-away force. Accordingly, the second ramped or contoured surface 179 enables intentional removal of the valve arrangement 152 from the enclosure 102 while inhibit unintentional removal.

[0051] Having described the preferred aspects and implementations of the present disclosure, modifications and equivalents of the disclosed concepts may readily occur to one skilled in the art. However, it is intended that such modifications and equivalents be included within the scope of the claims which are appended hereto.

Claims

Attorney Docket No. 15720.1141W0U1What is claimed is:

1. A valve assembly comprising: a valve body extending along an axis between a first end and a second end, the valve body defining a passage extending between the first and second ends, the vent body defining a sealing portion and an insert portion, the insert portion extending from the sealing portion to the first end of the valve body; a support surface disposed at the insert portion, the support surface facing towards the second end of the valve body; a ramped surface disposed at the insert portion, the ramped surface leading to the support surface; and an anti-rotation member disposed between the support surface and the second end of the valve body, the anti-rotation member being flexible between an undeflected position and a deflected position.

2. The valve assembly of claim 1, wherein the anti-rotation member is formed monolithically with the valve body.

3. The valve assembly of claim 2, wherein the anti-rotation member includes a latch finger.

4. The valve assembly of claim 2, wherein the anti-rotation member includes a flexible ramp.

5. The valve assembly of claim 1, further comprising a particle arrester, wherein the anti-rotation member is carried by the particle arrester.

6. The valve assembly of claim 5, wherein the particle arrester is formed of a different material from the valve body.

7. The valve assembly of claim 1, wherein the anti-rotation member is aligned with the support surface along the axis.Attorney Docket No. 15720.1141W0U18. The valve assembly of claim 1, wherein the anti-rotation member is laterally offset from the support surface.

9. The valve assembly of claim 8, wherein the anti-rotation member includes a free end that aligns with an edge of the ramped surface.

10. The valve assembly of claim 1, wherein a stop is disposed at an opposite side of the support surface from the ramped surface; and wherein the anti-rotation member includes a second ramped surface facing at least partially towards the stop.

11. A valve arrangement configured to mount to a wall of an enclosure at an aperture defined through the wall and leading between an interior of the enclosure and an exterior of the enclosure, the valve assembly comprising: a valve body extending along an axis between a first end and a second end, the valve body defining a passage extending between a port at the first end and a plurality of windows at the second end; and a particle arrester mounted to the valve body to be installable at the aperture of the wall as a unit, the particle arrester including a patterned surface extending across the port of the valve body, the patterned surface being disposed within the interior of the enclosure when the unit is installed at the aperture, the particle arrester having a first surface configured to extend along an interior surface of the wall of the enclosure and a second surface configured to extending along an exterior surface of the wall of the enclosure when the valve arrangement is mounted at the wall.

12. The valve arrangement of claim 11, wherein the particle arrester includes an antirotation device to maintain the particle arrester in a fixed rotational position relative to the wall.

13. The valve arrangement of claim 12, wherein the anti -rotation device includes a flexible body configured to snap over an edge of the enclosure when the valve body and particle arrester are rotated as a unit relative to the enclosure.Attorney Docket No. 15720.1141W0U114. The valve arrangement of claim 12, wherein the anti-rotation device defines a ramped or contoured surface configured to inhibit rotation in a first rotational direction absent an application of a predetermined break-away force.

15. The valve arrangement of claim 12, wherein the anti -rotation device includes a first anti-rotation member and a second anti-rotation member spaced apart along a circumference of the particle arrester.

16. A valve assembly configured to mount to an enclosure at an aperture, the valve assembly comprising: a valve body extending along an axis between a first end and a second end, the valve body defining a passage extending between the first and second ends, the vent body defining a sealing portion and an insert portion, the insert portion extending from the sealing portion to the first end of the valve body; a mounting arrangement disposed at the insert portion, the mounting arrangement including a support surface extending between a ramped surface and a stop; and an anti-rotation member configured to inhibit rotation of the valve body relative to the enclosure, the anti-rotation member being offset along the axis from the mounting arrangement, the anti-rotation member also being offset from the mounting arrangement along a circumference of the valve body, the anti-rotation member including a flexible body extending towards the mounting arrangement.

17. The valve assembly of claim 16, wherein the anti-rotation member is carried by the valve body.

18. The valve assembly of claim 16, wherein the anti-rotation member is carried by a separate particle arrester mounted to the valve body.

19. The valve assembly of claim 16, wherein the flexible body is shaped to enable intentional removal of the valve arrangement from the enclosure while inhibiting unintentional removal.

20. The valve assembly of claim 19, wherein the flexible body defines a ramped or contoured surface.

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