Hydrogen Energy Silicone Hose | Fuel Cell & H2 Transfer | High Purity | Rekky
Fuel cell coolant, hydrogen transfer & electrolyzer circuits
Industry Overview
Hydrogen is emerging as a cornerstone of the global energy transition — powering fuel cell vehicles, storing renewable energy, and decarbonizing heavy industry. However, hydrogen’s unique properties — small molecular size, high permeability, and extreme reactivity — place extraordinary demands on fluid transfer components. Even trace contamination from tubing materials can poison fuel cell catalysts, reduce system efficiency, or create safety hazards.
Rekky Technology’s hydrogen-energy-grade silicone hoses are engineered for the specific challenges of hydrogen production, storage, and utilization. Our platinum-cured silicone delivers the ultra-low extractables and ionic purity required for fuel cell coolant circuits, where contamination can degrade membrane performance. The high-temperature capability (up to 250°C with PMQ formulations) supports the thermal management needs of high-power fuel cell stacks and electrolyzers.
For hydrogen gas transfer, our anti-static conductive hose options prevent the static buildup that could ignite hydrogen-air mixtures — a critical safety requirement in ATEX-classified zones. The 316L stainless steel wire reinforcement provides structural integrity under the high pressures common in hydrogen storage and distribution systems.
As the hydrogen economy scales from demonstration projects to gigawatt production, Rekky provides the reliability-assured components that enable safe, efficient, and durable hydrogen systems.
Compliance & Certifications
- ATEX Directive 2014/34/EU — Explosive atmosphere equipment (supported)
- ISO 19880 — Gaseous hydrogen fueling stations
- IEC 62282 — Fuel cell technologies
- REACH — EU chemical safety
- RoHS — Restriction of hazardous substances
Industry Challenges & Solutions
| Challenge | Rekky Solution |
|---|---|
| Fuel cell catalyst poisoning | Ultra-low extractables, ionic purity |
| Hydrogen small molecule permeation | Dense silicone wall, multi-layer construction |
| Static ignition risk | Conductive silicone hose, ATEX compliant |
| High-temperature thermal management (>80°C) | PMQ 250°C rated |
| High-pressure hydrogen storage (350/700 bar) | Steel wire reinforcement, high-strength braid |
| Long lifetime requirement (>10 years) | Aging resistant, ozone resistant |
Recommended Products
| Product | Application | Key Advantage |
|---|---|---|
| Pharma Grade Tubing | Fuel cell coolant | Ultra-low ionic extractables |
| High-Temperature Hose | Stack thermal management | 250°C continuous |
| Anti-Static Conductive Hose | H2 gas transfer | 10³–10⁵ Ω, ATEX |
| Steel Wire Reinforced Hose | High-pressure hydrogen | 316L wire, 30 bar |
| Fluorosilicone Lined Hose | Lubricant/sealing fluid | Chemical resistant, oil resistant |
Key Applications
Fuel Cell Coolant Circuits
PEM fuel cells require deionized water coolant to maintain stack temperature. Even trace ionic contamination from tubing can degrade the proton exchange membrane. Our pharma-grade platinum-cured tubing is validated for extremely low ionic extractables, with full COA documentation for fuel cell OEM qualification.
Hydrogen Gas Transfer
Hydrogen’s small molecular size makes it prone to permeation through conventional materials. Our dense platinum-cured silicone wall construction minimizes permeation, while the optional anti-static conductive layer prevents static charge buildup that could ignite hydrogen-air mixtures in ATEX zones.
Electrolyzer Systems
Alkaline and PEM electrolyzers operate at elevated temperatures (60–80°C) with corrosive electrolytes (KOH, deionized water). Our high-temperature silicone formulations withstand these conditions, while the chemical resistance of fluorosilicone-lined options handles the most aggressive electrolyte chemistries.
High-Pressure Storage & Distribution
Hydrogen is stored at 350 bar (35 MPa) or 700 bar (70 MPa) for vehicle fueling. While our standard hoses are rated to 30 bar, we can engineer custom high-pressure assemblies with multi-layer reinforcement for intermediate-pressure distribution lines (up to 40 bar).
Frequently Asked Questions
PEM fuel cell membranes are highly sensitive to ionic contamination. Even ppm-level ions from tubing extractables can increase coolant conductivity, causing electrical shorting across the stack and degrading membrane performance. Our pharma-grade tubing is validated for ultra-low ionic extractables.
Our standard Steel Wire Reinforced Hose is rated to 30 bar, suitable for intermediate-pressure distribution. For 350/700 bar vehicle fueling applications, we can engineer custom multi-layer reinforced assemblies. Please contact our engineering team for high-pressure hydrogen applications.
Our anti-static conductive hose design is ATEX-compliant for Zone 1 and Zone 2 when properly grounded. Full ATEX certification of complete assemblies can be arranged through our notified body partners.
Related Products
- Pharma Grade Silicone Tubing
- High-Temperature Silicone Hose
- Anti-Static Conductive Hose
- Steel Wire Reinforced Hose
- Fluorosilicone Lined Hose
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