Permeation and leak tightness
Hydrogen's molecular size defeats standard elastomer seals, requiring metal or specialised polymer sealing with helium leak verification.
Energy · Industry
Electrolyser, storage and fuel-cell filtration built around hydrogen's leak behaviour, embrittlement risk and purity thresholds.
- mbar·L/s helium leak rate
- 1×10⁻⁹
- Grade D purity achieved
- ISO 14687
- Total sulphur limit met
- 4 ppb
The constraint
Purity engineering for the smallest molecule there is.
Hydrogen breaks the assumptions built into conventional filtration. It leaks through seals that hold every other gas, it embrittles standard steels, and fuel-cell catalysts are poisoned by contaminants measured in parts per billion.
Standards we work to
- ISO 14687
- ISO 19880
- ASME B31.12
- SAE J2719
- EN 17124
Material embrittlement
High-strength steels lose ductility in hydrogen service; metallurgy and hardness limits are safety-critical decisions.
ISO 14687 purity thresholds
Fuel-cell grade hydrogen limits CO to 0.2 ppm and sulphur to 4 ppb — orders of magnitude beyond industrial gas practice.
Electrolyser KOH carryover
Alkaline electrolyte aerosol must be removed from the product stream without introducing new contaminants.
Applications
Where we filter in hydrogen & fuel cells
- 01Alkaline and PEM electrolyser feed water polishing
- 02Product hydrogen aerosol and particulate removal
- 03KOH and electrolyte carryover separation
- 04Refuelling station final filtration
- 05Fuel cell feed gas polishing
- 06Compression and storage protection
Recommended platforms
What we typically specify here
Proof
Hydrogen & Fuel Cells case studies
Next step
Send us your hydrogen & fuel cells stream data.
Our applications engineers work to the standards listed above every week. You will not be explaining your industry from first principles.
Or call +91 79 4890 2200 · sales@worldasatech.com