For launch pads with cryogenic fluid production capacity
Air Liquide's HELIAL and HYLIAL liquefiers enable the production of liquid helium and hydrogen respectively, directly on the launch pad.
Ariane 5's cryogenic stage requires huge quantities of helium: two fixed storage tanks with a capacity of 100,000 liters each were installed by Air Liquide in Kourou, in order to clean, condition, and to pressurize the rocket's tanks and cryogenic lines on the ground, before filling them with oxygen or liquid hydrogen. To prevent the loss of helium, which is highly volatile, the Kourou Space center boasts a HELIAL that recovers cool helium vapor in the tanks on the ground in order to reinject it in liquid form. HELIAL also helps to depressurize helium transportation tanks, to limit losses during transfer from the trailer to the storage tank.
Several space centers have acquired our HYLIAL to supply launch vehicles with liquid hydrogen. The Xichang center, in the Province of Sechuan, and the Wenchang center, on Hainan island, both acquired hydrogen liquefiers, allowing them to produce liquid hydrogen on site. Previously, the cryogenic fuel was transported to the space centers in special convoys over thousands of kilometers.