Hydrogen boosting, 30 to 150 Bar.

Why hydrogen needs purpose-built compression

Hydrogen is the smallest, lightest molecule in industrial gas handling, and it behaves accordingly — it diffuses through seals that hold other gases without issue, and it embrittles many common metals over time through a process where absorbed hydrogen atoms reduce the ductility and fracture toughness of the metal lattice. A compressor built for air or nitrogen and simply re-rated for hydrogen inherits both problems. The Hydrogen Gas Boosting Station is designed around hydrogen from the outset: every wetted surface, seal, and drive-isolation feature reflects that starting point.

Hydraulic drive with glycol medium

The compression stroke is driven hydraulically, using a glycol medium rather than the gas itself, at 500W to 750W of electrical input. This gives smooth, controlled double-acting compression cycles across the 30 Bar to 150 Bar range, without the pulsation and wear characteristics of a direct-drive reciprocating gas compressor. An open barrier between the glycol drive circuit and the gas path is a deliberate design choice: it prevents the drive fluid from ever contaminating the hydrogen stream, so gas purity is maintained for the life of the unit.

Hydrogen-specific materials engineering

Every component in contact with hydrogen — cylinder bores, valve bodies, fittings — is specified in brass, with NBR (nitrile) rubber used for seals and elastomeric components. This combination is chosen specifically to mitigate hydrogen embrittlement, which is a real and well-documented failure mode in ferrous alloys exposed to hydrogen under pressure and cyclic loading. The cylinder stroke components themselves are specified in corrosion-resistant steel able to withstand the pressure and cyclic stress of continuous compression duty.

Cooling and thermal stability

Compressing any gas generates heat, and hydrogen's high specific heat ratio makes this more pronounced than with heavier gases. The HGBS includes a dedicated cooling circuit to manage the heat generated during compression, keeping the whole system within safe operating temperature limits and preventing thermal degradation of seals and drive fluid during continuous operation.

Safety mechanisms for reliable operation

Two safety layers are built into the standard configuration. First, a relief valve on the glycol circuit automatically releases excess pressure to prevent the system exceeding its 150 Bar rating, protecting both equipment and personnel. Second, redundant fail-safe controls continuously monitor system conditions and trigger an automatic emergency shutdown the moment an anomaly is detected — without requiring operator intervention to arrest a fault condition.

A twin-cylinder configuration for combined H₂/O₂ duty

The standard unit is built around two cylinder legs sharing a single base, hydraulic drive, and control panel: a hydrogen leg on a 100 mm stroke, and a second, oxygen-rated leg on a 50 mm stroke. This arrangement suits sites that need to boost both gases from a common skid — for example, facilities running water electrolysis, where hydrogen and oxygen are produced together and both may need compression for storage or downstream use. Each leg carries its own gauges and isolation, so the two gas streams remain independently controlled even though they share a drive.

Applications across the hydrogen value chain

The HGBS's combination of low power draw, compact skid footprint, and hydrogen-safe construction makes it suited to a range of duties: compressing hydrogen for refuelling-station dispensing infrastructure, supplying industrial gas distribution networks, providing controlled pressure for R&D work on hydrogen storage and fuel cells, and supporting renewable energy projects that store hydrogen generated from surplus wind or solar power. In chemical processing, the same unit boosts hydrogen for hydrogenation reactions requiring high-pressure gas supply.

For related hydrogen infrastructure, Neometrix's Dynamic High-Pressure Hydrogen Leak Test Rig validates hydrogen cylinder and component integrity up to 1000 Bar, the Burst Chamber for Hydrogen Cylinder Testing provides destructive test capability for hydrogen storage cylinders, and the Hydrogen Piston Engine Test Bench supports H₂ dual-fuel engine development — together covering the compression, safety-testing, and end-use sides of hydrogen infrastructure.