Positioned between the stack and the hydrogen ejector in the recirculation loop
Fuel Cell Gas-Liquid Separator
Cyclone + baffle · ≥ 95 % water removal · 1200 SLPM
Hydrogen circuit
Overview
Positioned on the hydrogen recirculation line, it separates, collects and stores the liquid water carried out of the stack with the recirculated hydrogen, then discharges it through a drain valve once the level is reached. The dewatered hydrogen re-enters the circulation loop, preventing faults caused by excessive water content and raising both hydrogen utilisation and stack safety.
Key features
- High separation efficiency — ≥ 95 % water removal on the hydrogen circuit
- Large flow capacity up to 1200 SLPM with low pressure drop
- Compact aluminium alloy construction, easy to integrate on-board
- Automatic discharge — N₂ valve and heated drain valve on a timed cycle
- Wide operating window — 0 – 3.5 bar, −30 to +95 °C, valve response < 30 ms
Specification
Technical data
Model selection
| Circuit | Model | Application | Pressure | Max. flow | Separation | Medium temp. | Interfaces |
|---|---|---|---|---|---|---|---|
| Hydrogen circuit | FSQ-100A | 10 – 100 kW | 0 – 3.5 bar | 1200 SLPM | ≥ 95 % | −30 ~ +95 °C | Φ20 / Φ12.7 |
| Air circuit | KFS-10 | Small-power stack | 0 – 3.5 bar | 2000 SLPM | ≥ 85 % | −40 ~ +120 °C | Φ32 / Φ38 |
Main body — technical parameters
| Parameter | Value |
|---|---|
| Permissible gases | H₂, N₂, air and their H₂O mixtures |
| Pressure range | 0 – 3.5 bar |
| Stack power rating | 10 – 100 kW |
| Medium temperature | −30 – +95 °C |
| Water storage volume | ≥ 40 – 80 mL |
| Body material | Aluminium alloy |
| Separation efficiency | ≥ 95 % |
| Max. flow rate | 1200 SLPM (H₂ 78 / N₂ 7 / H₂O 15 %) |
| Altitude | ≤ 3000 m |
| Mounting | Vertical, 4 × Φ6.5 mm, M6 bolts at 10 ± 2 N·m |
| Warranty | 5 years body, 1 year valves |
Valve and interface parameters
| Parameter | Value |
|---|---|
| Hydrogen inlet / outlet | Φ20 mm barb fitting / Φ20 mm barb (customisable) |
| Drain / exhaust outlet | Φ12.7 mm barb fitting |
| N₂ valve | 24 VDC (18–32 V), 10 W, Φ2 mm, < 30 ms |
| Drain valve | 24 VDC (18–32 V), 13 W, Φ1.5 / 2.5 mm, heating 45 W |
| Valve connector | TE 282080-1 · MG641101-5 · solenoid TE 282104-1, non-polar |
Application
Where it is used
Dry hydrogen flows to the ejector; separated water drains from the bottom port
More in hydrogen circuit
Related reading
From the engineering notes
Background on the design decisions behind this component — all articles.
What a fuel cell stack expects from its balance of plant
A stack presents four interfaces — hydrogen, air, coolant and DC bus. Match each one with the right parts and integration gets much simpler.
Fuel Cell Gas-Liquid Separator — product brochure (PDF)
Full specifications, model selection tables and engineering notes. Two pages, English.
Download PDF
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