| 摘要 |
A venting valve comprises a cover including a flow path in fluid communication with an evaporative emissions system and a liquid discriminating and vapor permeable membrane connected to the cover. At least a portion of the outer surface of the membrane comprises a plurality of alternating curved crests and valleys. In other embodiments, the membrane comprises a first and second layer defining a gap therebetween, wherein at least a portion of the membrane is spirally wound. In other embodiments, the venting valve includes at least one protrusion configured to support and shape the membrane, wherein at least a portion of the membrane is curved.
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