APPLICATION
Green hydrogen — alkaline electrolyser lye circulation
KOH lye circulation around the electrolyser stack — hot caustic, continuous duty, purity-critical.
The typical duty
| Fluid | Potassium Hydroxide (≤50%), 30% |
|---|---|
| Temperature | 85 °C |
| Flow | 40 m³/h |
| Head | 35 m |
| Viscosity | ≈ 2 cP |
What the selector says at this duty
| Primary answer at this duty | Fluoroplastic-Lined Centrifugal Pump (PTFE/PFA/FEP lined) — Strong acids (HCl, dilute H2SO4, mixed acids) where no metal survives economically |
|---|---|
| Typical wetted materials | PTFE / FEP lined |
The answer above is the tool's own output at the duty shown — run your actual numbers through it; your duty point may move the answer. The full report adds the alternatives worth quoting in parallel.
What to watch
- Load ranges of 30–120% are part of the duty definition, not an afterthought
- See the site's lye-circulation technical article for the draft manufacturing conditions
Related reading
Your duty differs from the typical one? The selector on the home page maps your fluid, temperature and duty point to a pump type and wetted materials — free. Pick "Green hydrogen — alkaline electrolyser lye circulation" in the Industry dropdown and the typical duty is pre-filled for you to adjust.
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