DRIV HYDROGEN — warm flushing and first fill of hydrogen tanks at Kløfta
A one-of-a-kind hydrogen preparation facility.
New hydrogen tanks are delivered pressurised with an inert preservation gas, typically nitrogen. Prior to entering into service, this gas needs to be removed and replaced with clean hydrogen — through flushing. This is what we do.
At our hydrogen preparation plant at Kløfta, Norway, we provide hydrogen flushing at elevated temperatures — what we call Warm Flushing. This allows us to significantly reduce the amount of hydrogen required to remove the preservation gas and achieve the required hydrogen purity.
And instead of venting the hydrogen-rich off-gas, we capture it, recover its energy and feed that energy back into the process — maintaining the optimal flushing temperature.
Reduced hydrogen consumption — Energy recovery — Zero hydrogen venting
Our reformer delivers 240 kg of biohydrogen every day — ready to use now, not someday.
Results we can prove
Our daily operations
Three specialised services, delivered as one standardised product.
Let's talkWarm flushing & first fill
Biohydrogen production
Gas analysis
Over eight pressure cycles, the nitrogen content in the tank drops from 495 700 ppm to just 178 ppm. Purity climbs from 50.43 % to 99.982 % — comfortably below the 300 ppm requirement.
When can we take your container?
We handle it all — so you don't have to.
From nitrogen-filled tank to ready for hydrogen service — one standardised process at Kløfta.
Intake
Your tank arrives at Kløfta, factory-filled with nitrogen. We inspect it and get it ready for flushing.
Let's talk
Get in touch
Ready for hydrogen — today.
Send an enquiry and we'll come back with a schedule — usually within one working day.
Your questions, answered.
Everything you need to know about working with us. Still not sure? Get in touch — we'll sort it out in a quick call.
New Type IV tanks arrive filled with pressurised nitrogen, and the polymer liner can be permanently damaged if that pressure is released while the tank is cold. So we condition the tank warm in our ATEX-compliant workshop before flushing out the nitrogen with hydrogen in controlled cycles at 0.5–3 bar — a circular, emission-free flushing process that uses >90 % less hydrogen than the traditional method.
The process is standardised and predictable: 20 and 30 ft containers take 4 working days, 40 and 45 ft take 5. We confirm the schedule for every delivery as soon as your enquiry comes in.
A Gas Analysis Report for every fill, documenting impurities below 300 ppm, together with Flushing Quality Documentation — plus ADR transport documents, safety data sheets and agreements, all in one place on My Page.
Pricing depends on volume, container type and delivery scope. Send us an enquiry describing what you need, and we’ll come back with a concrete offer — usually within one working day. For context, our warm flushing saves >90 % of the hydrogen a cold flush would consume, and 5–12 tonnes of CO₂e per container depending on size.
We produce it ourselves — steam reforming certified biomethanol at Kløfta: 240 kg a day, at 83 % efficiency. It meets the EU sustainability criteria for renewable hydrogen, on par with green hydrogen.