Process and device for filling tanks

A method for filling tank(s) with pressurized gas via a filling station, comprising the steps of:

• providing several containers for storing gas under pressure and a fluidic circuit for transferring the gas from the containers to the tank(s) by pressure equalizing, the circuit comprising a first end to which the containers are connected in parallel and a second end equipped with a transfer pipe intended to be removably connected to the tank(s) for filling, the circuit comprising, and being arranged in series between the first end and the second end, a first isolation valve, a flow or pressure regulating member, and a second isolation valve;
• filling a first tank with the pressurized gas from the transfer pipe;
• filling a second tank with the pressurized gas from the transfer pipe, wherein at an end of the filling of the first tank and before the filling of a second tank, the first and the second isolation valves are closed in order to trap a reserve of gas under pressure in the circuit between the first and second isolation valves;
• and
• using the trapped reserve of gas to fill at least one of the containers.