HDRX-R500 — 500 bar hydrogen regulator
Development programme — configuration quotations open · qualification units planned 2027 Q2
The HDRX-R500 is the 500 bar (7,250 psi) supply class of the MEYER HDRX-R series: for 500 bar systems and forward-looking platforms — maximum energy density per cylinder volume. Two-stage pressure reduction for constant delivery from full cylinder to empty; outlet 0.2–10 barg set to your fuel cell and held to ±0.1 bar as standard.
| Supply (inlet) | 500 bar · 7,250 psi |
|---|---|
| Outlet | 0.2 – 10 barg · set to order · ±0.1 bar standard |
| Regulation | Two-stage (constant delivery pressure as the cylinder empties) |
| Body / size | 316 stainless steel (embrittlement-safe) · Ø 65 mm · ~245 g target |
| Connections | M18×1.5 cylinder side · M8×1.25 outlet (others on request) |
| Cylinder side | 500 bar system architectures |
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Fitted configurations at 500 bar
| Fuel cell | Configuration |
|---|---|
| IE-SOAR 650W (legacy) | HDRX-R500-2S-SS-O0.5-F10 |
| IE-SOAR 800W Gen2 | HDRX-R500-2S-SS-O0.9-F15 |
| IE-SOAR 1.2kW (legacy) | HDRX-R500-2S-SS-O0.5-F18 |
| IE-SOAR 2.4kW | HDRX-R500-2S-SS-O0.9-F50 |
| Aerostak A-250 | HDRX-R500-2S-SS-O0.7-F5 |
| Aerostak A-500 | HDRX-R500-2S-SS-O0.7-F8 |
| Aerostak A-800 | HDRX-R500-2S-SS-O0.7-F12 |
| Aerostak A-1000 | HDRX-R500-2S-SS-O0.7-F17 |
| Aerostak A-1500 | HDRX-R500-2S-SS-O0.7-F26 |
| Aerostak A-2000 | HDRX-R500-2S-SS-O0.7-F30 |
| Protium-300 | HDRX-R500-2S-SS-O0.55-F5 |
| Protium-1000 | HDRX-R500-2S-SS-O0.7-F16 |
| Protium-2500 | HDRX-R500-2S-SS-O0.7-F40 |
| Protium-3000 | HDRX-R500-2S-SS-O0.7-F48 |
| 600U / 600U-HV | HDRX-R500-2S-SS-O1-F10 |
| 1200U | HDRX-R500-2S-SS-O1-F19 |
Frequently asked questions
- What is the HDRX-R500?
- A two-stage high-pressure hydrogen regulator with a 500 bar (7,250 psi) supply rating — for 500 bar systems and forward-looking platforms — maximum energy density per cylinder volume.
- What outlet pressures are available?
- 0.2–10 barg, set to your fuel cell's inlet specification at order and held to ±0.1 bar as standard; any custom setpoint in that range.
- Which fuel cells does it fit?
- Any stack in its outlet range — fitted configurations are published for Intelligent Energy IE-SOAR, H3 Dynamics Aerostak, Spectronik Protium and Honeywell UAV fuel cells.
Helium service
The HDRX-R500 is also configured for helium — airship and aerostat top-up, automated balloon-launch stations and laboratory service, with an SS 316 wetted path that is inert in helium. See the helium regulator page or configure for helium.