- Sealless, magnetic-drive centrifugal pump with hermetically sealed containment shell—no leakage, long service life
- Lined with PTFE/PFA (4 mm)—ideal for aggressive or hazardous chemicals
- Hollow PTFE impeller on ceramic shaft, supported by silicon carbide sleeve and thrust bearings—ensures excellent lubrication and dry-run tolerance
- Containment shell in carbon-fibre/PTFE or zirconium oxide—prevents eddy-current losses
- Explosion-proof motor (EEx e II T3 standard)—suitable for hazardous environments
| Parameter | Specification |
|---|---|
| Brand | GEKO Pumpen |
| Casing material | Cast iron (GGG‑40.3) with 4 mm PTFE/PFA lining |
| Impeller | PTFE closed impeller with curved blades |
| Shaft & Bearings | Ceramics shaft; SiC sleeve + thrust bearings |
| Magnetic drive | Permanent magnet coupling (cobalt–samarium) |
| Containment shell | Carbon-fibre + PTFE or zirconium oxide |
| Min. flow rate (Qₘᵢₙ) | 0.5 m³/h |
| Max. flow (Qₘₐₓ) | Up to 200 m³/h (50 Hz) |
| Max. head (Hₘₐₓ) | Up to 90 m (50 Hz) |
| Max. pressure | Up to 16 bar @150 °C |
| Max. temperature | 150 °C (optional higher on demand) |
| Motor options | Explosion-proof 3-ph, EEx e II T3 / ATEX |
| Standards | DIN EN 22858, ISO 2858 |
Geko Pumpen’s GEKONORM NM Series are high-integrity magnetic-drive centrifugal pumps designed for the safe, leak-free handling of aggressive or dangerous chemicals under DIN EN 22858 standards . The sealless design eliminates shaft seals entirely and ensures hermetic containment, making it ideal for critical applications in chemical, pharmaceutical, and environmental engineering.
Key flow of operation:
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The 4 mm PTFE- or PFA-lined casing resists aggressive media.
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The PTFE impeller is mounted on a hollow ceramic shaft—this design features dual silicon carbide bearings and thrust support to ensure constant internal circulation, enabling safe dry-run and preventing bearing failure.
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The permanent magnet coupling (made from cobalt–samarium) ensures durable, maintenance-free power transmission.
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The containment shell, built from carbon-fibre/PTFE or zirconium oxide, avoids eddy currents and maximizes efficiency.
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Models are available either in pull-out (bare-shaft) or close-coupled (monobloc) versions with explosion-proof motors, suited for harsh chemical environments.
With min. flow of 0.5 m³/h, max capacity up to 200 m³/h and head to 90 m, plus max operating temp 150°C and pressure 16 bar, the NM series delivers tight containment, robustness, and compliance with FDA and ATEX requirements.
