Delfin 452 AIREX 1/2D-2/2G INERT 7V
Pneumatic ATEX combi vacuum with INERT neutralisation bath -- 7 venturi, Zone 21 dust + Zone 1 gas (IIB), 15 L total tank in AISI 304
- Refineries with lead dust and gas zones (Zone 1 IIB)
- Chemical plants with pyrophoric powders and organic vapours
- Ammunition manufacturing with gas and dust zones simultaneously
- Process plants where electric motor is not permitted regardless of technology
- Pharmaceutical production with reactive powders and gas zones
- ATEX Directive 2014/34/EU -- II 1/2D Ex h IIIC T85°C Da/Db -- II 2/2G Ex h IIB T6 Gb/Gb
- EN 17348:2022 (harmonized March 2023)
- IEC 60335-2-69 (industrial vacuums)
Delfin 452 AIREX 1/2D-2/2G INERT 7V
The Delfin 452 AIREX 1/2D-2/2G INERT 7V is the combination of two advanced technologies: pneumatic venturi drive (no electric motor, no ignition source) and INERT neutralisation bath (reactive metallic dust inactivated instantly). Double ATEX-certified: II 1/2D for dust (Zone 21 with internal Zone 20) and II 2/2G IIB for gas (Zone 1 externally and internally, gas group IIB). 7 venturi units deliver 150 m³/h airflow at 3700 mmH₂O vacuum, with air consumption of 729 nl/min at 6 bar. Full AISI 304 stainless steel construction, 15-litre INERT tank (10 L liquid + 5 L material). Used where both gas and dust risk and reactive metallic powder occur simultaneously -- typically in refineries and chemical plants.
Applications
- Refineries with lead dust and gas zones (Zone 1 IIB)
- Chemical plants with pyrophoric powders and organic vapours
- Ammunition manufacturing with gas and dust zones simultaneously
- Process plants where electric motor is not permitted regardless of technology
- Pharmaceutical production with reactive powders and gas zones
Technical specifications
| ATEX marking | II 1/2D Ex h IIIC T85°C Da/Db -- II 2/2G Ex h IIB T6 Gb/Gb |
|---|---|
| Internal / external zone | 20 / 21 |
| Motor type | 7 venturi-enheder, pneumatisk drift (trykluft) |
| Duty cycle | Continuous |
| Airflow | 150 m³/h |
| Vacuum | 363 mbar (3700 mmH₂O) |
| Container | 15 L |
| Sound pressure | 68 dB(A) |
| Filter class | H class |
| Filter type | HEPA H14 (EN 1822-5), 99,995 % MPPS, 11.000 cm² filterflade |
| Primary filter | Stjerne/taske polyester ANT M PTFE antistatisk, 20.000 cm², diameter 420 mm |
| Cleaning system | Manuel filterrensning |
| Collection system | INERT neutralisation bath |
| Material | AISI 304 rustfrit staal (helkonstruktion) |
| Air consumption | 729 nl/min |
| Supply pressure | 6 bar |
| Air supply hose | Ø 12 mm |
| Venturi units | 7 pcs |
| Inlet | Ø 50 mm |
| Dimensions (L × W × H) | 700 x 550 x 1270 mm |
| Weight | 50 kg |
INERT TECHNOLOGY — EN 17348:2022
What is an INERT vacuum cleaner?
Delfin's INERT vacuum cleaners are built to collect reactive metallic dust — the kind of dust that can self-ignite or react violently with oxygen, heat or water. Instead of collecting dust dry in a bag or container, the vacuum channels it directly into a neutralising liquid bath (typically water with a passivating agent added), where the reactive metal particle is inactivated on the spot. That is the difference between a controlled process and a vacuum that can itself become the ignition source.
Tested to EN 17348:2022
The INERT range is certified and performance-tested to EN 17348:2022, the harmonized European standard for industrial vacuum cleaners in ATEX zones. The test confirms that the neutralisation system actually inactivates reactive dust under real operating conditions — not merely in a lab setup. Combined with HEPA H14 final filtration (99.995 % efficiency at MPPS per EN 1822-5), the exhaust is clean down to the finest health-hazardous particles.
Typical applications
INERT vacuums are used at shooting ranges (lead dust and primer residue from cartridges), in ammunition manufacturing, for 3D printing with metal powders (aluminium and titanium are highly reactive when finely divided), in light-metal machining in aerospace and defense, and at process plants where pyrophoric powders such as zirconium and magnesium are handled. Some models are ACD-certified (IEC 60335-2-69 Annex AA) for non-ATEX-classified areas, others are ATEX-certified for Zone 20, 21 or 22 — but they all share the same neutralising liquid bath and the same uncompromising filtration.
INERT versus conventional HEPA filtration
A conventional HEPA vacuum retains particles in a filter but leaves them dry and potentially reactive. With reactive metallic dust that is not enough — the particle may react with oxygen (exothermic oxidation) or moisture (hydrolysis of certain metal hydrides) and disrupt the collection process itself. INERT technology solves this by inactivating the particle at the moment of collection: dust is immersed in the liquid before it can react, and the HEPA H14 filter then captures any residual aerosol before exhaust.
Questions and answers
What does INERT mean in this context?
INERT denotes a vacuum cleaner with a neutralising liquid bath in the collection tank. Dust is channelled directly into the liquid and inactivated immediately, so it cannot react with oxygen, heat or sparks. The technology is developed for reactive metallic dust (aluminium, titanium, magnesium, zirconium, lead dust from shooting ranges), where conventional dry collection would itself be an ignition source.
Is the INERT system tested to EN 17348:2022?
Yes. The entire Delfin INERT range is performance-tested to EN 17348:2022 -- the harmonized European standard for industrial vacuum cleaners in ATEX zones. The test confirms that the neutralisation bath actually inactivates reactive dust under real operating conditions, not just in a lab setup. Documentation available on request.
What types of dust is INERT technology intended for?
Reactive metallic dust: aluminium and aluminium alloys, titanium, magnesium, zirconium, fine iron powder, lead dust and primer residue from shooting ranges, and pyrophoric powders from aerospace and defense. For non-reactive dust (organic process dust, plastics, etc.) the INERT technology adds no further safety -- a standard ATEX or ACD model without liquid bath is selected instead.
How does the HEPA H14 final filter work together with the liquid bath?
The neutralisation bath inactivates dust at the moment of collection, but there will always be a fine aerosol fraction that passes the liquid surface. The HEPA H14 filter captures 99.995 % of particles down to 0.3 micrometres per EN 1822-5 (MPPS method) before exhaust. The combination secures both safe collection (no reactive dry particle) and clean exhaust (no health-hazardous aerosol). The filter is Included/Incluso as standard on all INERT models.
Why pneumatic venturi AND INERT simultaneously?
The two technologies solve different problems. Venturi drive eliminates electrical ignition sources in gas and dust zones -- no motor, no brushes, no power cable. The INERT bath eliminates the dust's own flammability -- reactive metallic dust is inactivated in the liquid before it can contact oxygen. Together they cover the scenario where both the environment and the dust itself pose ignition risk: the refinery that also handles lead dust from a shooting range, or the pharmaceutical plant producing reactive powders in a Zone 1 gas area. It is the most cautious dust collection Delfin offers.
What does gas group IIB mean in practice?
Gas group IIB covers most industrial hydrocarbons and ethylene -- but NOT hydrogen and acetylene (which require IIC). IIB is sufficient for most refinery scenarios, chemical plants and pharmaceutical facilities. If you work with hydrogen or acetylene, choose an IIC-certified model (e.g. the DM AIREX 1/2D-2/2G INERT 19V or 25V). Note that the double protection against gas and dust does NOT provide a higher safety margin against hydrogen -- the gas group is an absolute boundary.