Device and method for filling pressurized gas tanks

A device for filling pressurized gas tanks, comprising:

• a liquefied gas source containing liquefied gas;
• a storage buffer(s);
• and
• a transfer circuit, the transfer circuit comprising two parallel transfer lines each having an upstream end linked to the liquefied gas source, each of the two parallel transfer lines comprising a downstream end intended to be removably connected to a tank to be filled, each of the two transfer lines comprising:
• a pump for pumping the liquefied gas, a vaporizer line receiving the pumped liquefied gas from the pump, a vaporizer disposed in the vaporizer line for evaporating a first portion of the pumped liquefied gas, a branch line receiving a second portion of the pumped liquefied gas and allowing the second portion of liquefied gas to bypass the vaporizer, and at least one distribution valve, the at least one distribution valve being configured to control a flow of pumped liquefied gas and distributed between the vaporizer and the branch line, the storage buffer(s) being connected in parallel to each of the two parallel transfer lines via a set of valves, the two parallel transfer lines comprising first and second parallel transfer lines, wherein:
• the vaporizer line and the branch line of the first parallel transfer line split off from one another downstream of the pump of the first parallel transfer line and upstream of a mixing point where evaporated fluid from the vaporizer of the first parallel transfer line is mixed with the pumped liquefied gas in the branch line of the first parallel transfer line;
• and
• the transfer circuit comprises a connection duct linking the two parallel transfer lines at outlets of the two pumps, said connection duct comprising an isolation valve.