Fuel dispensing device with vapour extraction

摘要

The invention relates to a method and device for extracting fuel vapour displaced during the simultaneous operation of at least two fuel-dispensing units using a gas pump device. Each fuel-dispensing unit comprises a vapour extraction conduit in which a control valve is arranged. The different vapour extraction conduits are connected to a single gas pump device. The underpressure to be created by the gas pump device and essential for discharge of the correct quantity of vapour is determined, whereafter the control valves are adjusted such that they each allow through the correct quantity of vapour at the specific underpressure.