Vapour recovery system and vapour control method

A vapour recovery system for recovering vapour coming from a vehicle tank comprising:

• a valve configured for being positionable in a closed position, an open position creating a passageway with a first size, and one or more intermediate positions each creating a passageway with a size which is smaller than said first size;
• an actuator configured for operating said valve;
• an electronic controller configured for controlling said actuator to position said valve in a sequence of positions over time, wherein said sequence comprises at least one of said one or more intermediate positions during a time period, said time period being larger than 1 second;
• wherein the valve is arranged in a line of the vapour recovery system between a vapour outlet of the vehicle tank and the atmosphere;
• wherein the actuator is a stepper-motor based linear actuator;
• and
• wherein the controlling comprises selecting at least one intermediate position of said one or more intermediate positions, the selection consisting in selecting a number of steps to be set from a predetermined reference position.