Today, 4th of March is World Engineering Day! where we can celebrate and shine a spotlight on the fantastic engineering work being carried out not just today, but every day!

Here we have Ste, one of our experienced mechanical engineers working closely with our design engineers, building several defueling modules, which are part of a series of leak detection systems designed for vacuum leak testing high pressure hydrogen fuel tanks.

The defueling modules form part of the degassing stations which are located outside of the leak test chambers. Defueling the high pressure vessels (HPVs) is performed firstly inside the leak test chamber, then at a certain set-point the HPV is automatically removed and positioned elsewhere so they can be degassed down to atmospheric pressure, external to the leak test chamber.

The longest element with vacuum leak testing high pressure vessels is defueling them back down to atmospheric pressure. So, to achieve a greater throughput most of the defueling occurs at external defuel stations.

Ste’s experience and skills are vitally important for building the critical hydrogen vessel leak testing systems that are integrated directly into the high volume automotive production line and where the integrity of the high pressure vessels has to meet specific industry standards and regulations.

For assistance with our advanced leak detection systems designed for testing hydrogen fuel tanks, please contact our experienced sales engineers by email at