Abstract: A valve assembly includes a housing having first and second body portions cooperating to enclose a cavity. The first body portion includes a cap having a nozzle that extends from the cap, and the nozzle defines an outlet. The first body portion includes a seat defining an orifice in fluid communication with the outlet and the cavity. A float is disposed inside the cavity. A seal is spaced from the seat when the float is in the initial position and the seal engages the seat when the float is in the displaced position. In certain configurations, the cap, the nozzle, and the seat are formed together as one piece. In certain configurations, a second side wall surrounds the float and extends across the window to obstruct direct fluid communication between the window and the float. A gap is unobstructed between a first side wall and the second side wall.

Abstract: A fill limit vent valve configured for use with a reductant tank includes a valve body, a float and a vapor permeable membrane. The valve body can define an inner chamber and has a valve outlet. The float has a float body configured to be received within the inner chamber and configured to sealingly engage the valve body. The vapor permeable membrane can be configured to permit vapor to pass through while inhibiting liquid from passing through. The float is movable between (i) an open position wherein vapor flows along a first flow path through the valve inner chamber and out of the valve body; and (ii) a closed position wherein the float sealingly engages the valve body and precludes vapor from flowing along the first flow path while allowing flow along a second flow path through the vapor permeable membrane and out of the valve body.

Abstract: A fill limit vent valve configured for use with a reductant tank includes a valve body, a float and a vapor permeable membrane. The valve body can define an inner chamber and has a valve outlet. The float has a float body configured to be received within the inner chamber and configured to sealingly engage the valve body. The vapor permeable membrane can be configured to permit vapor to pass through while inhibiting liquid from passing through. The float is movable between (i) an open position wherein vapor flows along a first flow path through the valve inner chamber and out of the valve body; and (ii) a closed position wherein the float sealingly engages the valve body and precludes vapor from flowing along the first flow path while allowing flow along a second flow path through the vapor permeable membrane and out of the valve body.