A hydrogen compressor raises H2 pressure for electrolysis output, fuel cell refueling, industrial recovery, and chemical processing. Hydrogen's wide explosive range (4-75% in air) and low ignition energy make conventional oil-lubricated compression dangerous — discharge temperatures above the autoignition threshold can trigger ignition. RAYDAFON's water-injected screw design solves this by keeping the compression chamber below 45°C — a fundamental safety barrier that oil-lubricated alternatives cannot match. At the same time, water seals the rotor clearances, so no oil ever contacts the H2 stream and 99.999% purity is maintained.
Medium-pressure range optimized for water-injected screw compression of H2 gas.
Water injection keeps the compression chamber far below hydrogen's ignition threshold.
Zero oil contact means the 99.999% (5N) hydrogen purity is preserved end-to-end.
Hydrogen has the widest explosive range of any common industrial gas (4-75% in air), the lowest ignition energy (0.017 mJ — less than a static spark), and a very high flame speed. Traditional oil-lubricated compressors operate at 80-100°C discharge temperature — dangerously close to the autoignition threshold — and carry oil that can be ignited by static discharge. Water injection eliminates both risks simultaneously.
The RD-H2 series uses a single-screw air end with two symmetrically arranged star wheels. Water is injected directly into the compression chamber through spray holes on the air end shell. Because water absorbs compression heat instantly, the operating temperature of the air end is typically below 45°C — well below hydrogen's autoignition temperature. The water also forms a hydrodynamic film between the screw and star wheel, preventing metal-to-metal contact and eliminating the need for oil. The gas-water mixture is then separated in a stainless steel barrel: water settles to the bottom and recirculates, while the pure hydrogen exits through the minimum pressure valve at the top.
| Parameter | Specification |
|---|---|
| Working Pressure | 4-45 bar (0.4-4.5 MPa) |
| Flow Range | 5-59 m³/min |
| Compression Type | Single-screw, water-injected |
| Air End Temperature | Below 45°C (near-isothermal) |
| H2 Purity Maintained | 99.999% (5N) |
| Wetted Material | 304 food-grade stainless steel |
| Cooling | Water-cooled with closed-loop recirculation |
| Control | PLC with HMI; Modbus / Ethernet IP |
| Voltage | 380V / 440V (customizable) |
| Certifications | CE, ISO 9001 |
Water-injected hydrogen compressors serve industries where hydrogen purity, safety, and reliability are all non-negotiable. The 4-45 bar pressure range covers most medium-pressure H2 handling requirements in electrolysis, fuel cell, and industrial gas processes.
Hydrogen produced at 30 bar from a PEM stack often needs a boost before storage or pipeline injection. The RD-H2 compresses electrolysis output without degrading 5N purity.
Hydrogen recirculation and pressure boosting in fuel cell power plants require oil-free compression at controlled temperature. Water injection delivers both.
Refineries and chemical plants recover hydrogen from process off-gas and boost it back into the hydrogen network. See special gas range →
Hydrogen atmosphere furnaces require stable, pure H2 supply at 4-30 bar. Oil contamination would compromise the metallurgical process.
Hydrogenation, ammonia synthesis, and methanol production rely on high-purity H2 at controlled pressure. Water injection preserves the process catalyst.
Renewable hydrogen projects compress H2 for injection into the natural gas grid or storage caverns. The RD-H2 handles variable load from renewable electrolysis. See gas generator →
Compression into tube trailers, stationary vessels, or salt caverns requires a reliable medium-pressure H2 compressor with minimum downtime.
Pilot-scale hydrogen systems and research laboratories require small-flow H2 compression at variable pressure with complete purity preservation.
| Application | Recommended Pressure | Typical Flow |
|---|---|---|
| PEM electrolysis output boost | 15-45 bar | 5-30 m³/min |
| Fuel cell recirculation | 4-15 bar | 5-20 m³/min |
| Industrial H2 recovery | 10-40 bar | 20-59 m³/min |
| Metallurgical heat treatment | 4-20 bar | 5-15 m³/min |
| Chemical / ammonia synthesis feed | 20-45 bar | 20-59 m³/min |
| Power-to-gas grid injection | 15-40 bar | 10-40 m³/min |
| Hydrogen storage / tube trailer | 20-45 bar | 5-25 m³/min |
Pricing depends on working pressure, flow capacity, cooling configuration, and material selection. Share your application parameters and RAYDAFON will respond with a factory-direct quote within 12 hours.
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