Delfin DM AIREX 1/2D-2/2G INERT 25V
Pneumatic ATEX combi vacuum with INERT neutralisation bath -- 25 venturi (highest airflow in INERT range), 44 L tank, Zone 21 dust + Zone 1 gas IIB
- Largest central suction installations at refineries and petrochemicals
- Chemical production lines with high dust volume and multiple suction points
- Largest ammunition facilities with Zone 1 gas + Zone 21 dust
- Process plants where the 19V version cannot cover the airflow demand
- Pharmaceutical factories with high production tempo and INERT requirement
- 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 DM AIREX 1/2D-2/2G INERT 25V
The Delfin DM AIREX 1/2D-2/2G INERT 25V is the flagship of the INERT AIREX series: 25 venturi units deliver 590 m³/h airflow at 5000 mmH₂O vacuum -- the highest airflow among all INERT models. Double ATEX-certified (II 1/2D for dust and II 2/2G IIB for gas), 44-litre neutralisation tank in AISI 304, and HEPA H14 final filtration. Air consumption is 2500 nl/min at 6 bar, requiring significant compressed-air infrastructure. Built for the largest central suction installations in refineries and chemical production lines, where gas, dust and reactive metallic powder risk must all be handled simultaneously.
Applications
- Largest central suction installations at refineries and petrochemicals
- Chemical production lines with high dust volume and multiple suction points
- Largest ammunition facilities with Zone 1 gas + Zone 21 dust
- Process plants where the 19V version cannot cover the airflow demand
- Pharmaceutical factories with high production tempo and INERT requirement
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 | 25 venturi-enheder, pneumatisk drift (trykluft) |
| Duty cycle | Continuous |
| Airflow | 590 m³/h |
| Vacuum | 490 mbar (5000 mmH₂O) |
| Container | 44 L |
| Sound pressure | 74 dB(A) |
| Filter class | H class |
| Filter type | HEPA H14 (EN 1822-5), 99,995 % MPPS, 26.000 cm² filterflade |
| Primary filter | Stjerne/taske polyester ANT M PTFE antistatisk, 30.000 cm², diameter 500 mm |
| Cleaning system | Manuel filterrensning |
| Collection system | INERT neutralisation bath |
| Material | AISI 304 rustfrit staal (helkonstruktion, undtagen vognstel) |
| Air consumption | 2500 nl/min |
| Supply pressure | 6 bar |
| Air supply hose | Ø 12 mm |
| Venturi units | 25 pcs |
| Inlet | Ø 50 mm |
| Dimensions (L × W × H) | 620 x 620 x 1600 mm |
| Weight | 80 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.
When is the 25V necessary over the 19V?
The 25V version has 27 % higher airflow (590 vs 465 m³/h) against 63 % higher air consumption (2500 vs 1530 nl/min). Vacuum and tank size are identical. Choose the 25V if: (1) airflow is the bottleneck in the plant's central suction, (2) the compressed air installation can sustain 2500 nl/min without pressure drop, and (3) the higher operating cost can be justified by the investment. Otherwise the 19V is the more economical choice with the same ATEX certification.
What are the compressed air infrastructure requirements?
The 25V version requires an industrial compressor capable of delivering 2500 nl/min continuously at 6 bar -- typically a 40-50 kW screw compressor with a buffer tank of at least 500-1000 litres. The supply hose is 12 mm ID, but for longer runs a larger diameter (15-18 mm) is recommended to avoid pressure drop. Always use a compressed air filter and cooler upstream to protect the venturi nozzles against oil, water and particles.