Liquid vapor separator drain valve

A liquid vapor separator drain valve includes an outer housing defining upper and lower chambers separated by a divider. An upper housing coupled to the outer housing partitions the upper chamber into inner and outer chambers and defines an upper port for communication with a carbon canister. The outer housing defines an external port in communication with the outer chamber and for communicating with a fill limit valve. Upper and lower valves are positioned in the respective upper and lower chambers such that the valves and upper and lower chambers are arranged in a vertically stacked, concentric manner. The lower valve vents fuel vapor to the upper chamber in a rest position and seals a divider vent passage when liquid fuel reaches a lower threshold. The upper valve vents fuel vapor to the upper port and seals the upper port when liquid fuel reaches an upper threshold. 液体蒸汽分离器排放阀包括限定由分隔件分离的上部腔室和下部腔室的外部壳体。联接到外部壳体的上部壳体将上部腔室分成内部腔室和外部腔室并限定用于与碳罐连通的上部端口。外部壳体限定与外部腔室连通并用于与加注限制阀连通的外部端口。上部阀和下部阀定位在各自的上部腔室和下部腔室中，使得阀以及上部