Abstract: Ventilation system for a fuel tank comprising a pump, an active liquid/vapor separator (LVS) that can be drained using the pump, in which a roll-over valve (ROV) that is normally open brings, by default, the internal volume of the LVS into communication with the pump and only blocks this communication when the level of fuel in the valve reaches a certain height or when the tank is tilted beyond a certain angle, or even overturned.

Abstract: Liquid tank venting system comprising a chamber that is inside the tank and that is equipped with a drainage device that comprises at least one opening made in the chamber and an elastomer-based non-return valve capable of sealing/freeing this opening, according to which this non-return valve is forced into a position for leaktight closure of the opening via a specific device starting from a certain liquid level in the tank.

Abstract: Method for manufacturing a plastic fuel tank equipped with an internal accessory such as a liquid/vapor separation capacity for a venting system according to which: a parison is molded by blow molding or thermoforming, the accessory is equipped with a metal part and is fastened to the internal wall of the tank at the same time as it is molded, the tank is removed from the mold and the position of the metal part is located, and an opening is made in the wall of the tank depending on the position of the metal part.

Abstract: Ventilation system for a fuel tank comprising a pump, an active liquid/vapor separator (LVS) that can be drained using the pump, in which a roll-over valve (ROV) that is normally open brings, by default, the internal volume of the LVS into communication with the pump and only blocks this communication when the level of fuel in the valve reaches a certain height or when the tank is tilted beyond a certain angle, or even overturned.

Abstract: Liquid tank venting system comprising a chamber that is inside the tank and that is equipped with a drainage device that comprises at least one opening made in the chamber and an elastomer-based non-return valve capable of sealing/freeing this opening, according to which this non-return valve is forced into a position for leaktight closure of the opening via a specific device starting from a certain liquid level in the tank.

Abstract: Method for manufacturing a plastic fuel tank equipped with an internal accessory—such as a liquid/vapor separation capacity for a venting system—according to which: a parison is moulded by blow moulding or thermoforming; the accessory is equipped with a metal part and is fastened to the internal wall of the tank at the same time as it is moulded; the tank is removed from the mould and the position of the metal part is located; and an opening is made in the wall of the tank depending on the position of the metal part. Liquid/vapor separation capacity for a venting system.