Delfin 452 AIREX 7V 1/3D
Pneumatic ATEX vacuum for Zone 22 with internal Zone 20 -- 7 venturi, 45 L tank, star-pocket filter M-class antistatic
- Production with fine, dusty powder where large filter area reduces interruptions
- Cleaning after grinding, machining or painting in Zone 22
- Filling lines and dosing systems at pharmaceutical and food plants
- Concrete and cement plants with dust zones (where electric motors are not wanted)
- Mobile cleaning tasks in facilities with limited three-phase power capacity
- ATEX Directive 2014/34/EU -- II 1/3D Ex h IIIC T80°C Da/Dc
- EN 17348:2022 (harmonized March 2023)
- IEC 60335-2-69 (industrial vacuums)
Delfin 452 AIREX 7V 1/3D
The Delfin 452 AIREX 7V 1/3D occupies the middle ground in the AIREX family: 45-litre tank and a star/pocket filter of 20,000 cm² -- a markedly larger filter area than the cartridge models, which gives longer operating intervals and lower air load per cm² of filter. Same notified-body-certified ATEX II 1/3D marking and the same 7 venturi units as the smaller models. Built in painted steel, with manual shake-cleaning of the pocket filter. Particularly used where dust is fine and filter clogging would otherwise disrupt production frequently.
Applications
- Production with fine, dusty powder where large filter area reduces interruptions
- Cleaning after grinding, machining or painting in Zone 22
- Filling lines and dosing systems at pharmaceutical and food plants
- Concrete and cement plants with dust zones (where electric motors are not wanted)
- Mobile cleaning tasks in facilities with limited three-phase power capacity
Technical specifications
| ATEX marking | II 1/3D Ex h IIIC T80°C Da/Dc |
|---|---|
| Internal / external zone | 20 / 22 |
| Motor type | 7 venturi-enheder, pneumatisk drift (trykluft) |
| Duty cycle | Continuous |
| Airflow | 150 m³/h |
| Vacuum | 363 mbar (3700 mmH₂O) |
| Container | 45 L |
| Sound pressure | 68 dB(A) |
| Filter class | H class |
| Filter type | HEPA H14 (EN 1822-5), 99,995 % ved MPPS, 11.000 cm² filterflade |
| Primary filter | Antistatisk polyester klasse ANT M (star/lommefilter, 20.000 cm², diameter 420 mm). Option: PTFE klasse M antistatisk. |
| Cleaning system | Manuel ryste-rensning af lommefilter |
| Collection system | Plastic bag |
| Material | Malet staal (AISI 304 som option) |
| Air consumption | 729 nl/min |
| Supply pressure | 6 bar |
| Air supply hose | Ø 12 mm |
| Venturi units | 7 pcs |
| Inlet | Ø 80 mm |
| Dimensions (L × W × H) | 580 x 630 x 1190 mm |
| Weight | 46 kg |
Questions and answers
Why pneumatic venturi drive instead of an electric motor?
Venturi units have no moving parts, no brushes and no motor windings. That eliminates two things at once: a potential ignition source in an explosive atmosphere, and the maintenance burden of motor, bearings and cooling. The vacuum can run continuously for as long as compressed air is supplied, and there are no electrical components to certify or inspect. The trade-off is air consumption -- venturi makes most sense where compressed air is already available (production plants, refineries, pharmaceutical facilities).
What does the II 1/3D marking mean?
The marking reads as two digits: "1" is the internal category (Zone 20 inside the vacuum -- continuous dust atmosphere in the collection tank), and "3" is the external category (Zone 22 in the surrounding room -- rare or short-term dust atmosphere). "D" stands for dust. The internal Zone 20 certification is exactly what EN 17348:2022 has raised the bar on, and it is only obtained through notified-body certification.
What compressed-air installation is required?
The unit requires clean, dry compressed air at 6 bar with a 12 mm ID supply hose. Air consumption at full load is 729 nl/min, which corresponds to a mid-range industrial compressor, so the installation must be able to sustain this. Always fit an air filter upstream to protect the venturi nozzles.
Why a star/pocket filter instead of cartridge or sacco?
The pocket filter has 20,000 cm² of filter area -- more than three times the cartridge filter on the MTL 301 AIREX and four times the sacco filter on the 802 WD AIREX. This means lower air load per cm², longer intervals between cleanings and better performance on fine dust. The trade-off is slightly more effort to replace and manual shake-cleaning, whereas the sacco model is just a bag swap.
Is it certified to EN 17348:2022?
Yes. All AIREX models are certified by a notified body (IMQ / IECEx) to EN 17348:2022, the harmonized standard for industrial vacuum cleaners handling combustible dust in ATEX zones. The certificate covers both internal category 1 (Zone 20) and external category 2 or 3 depending on the model. Documentation available upon request.
How is the dust collected?
Dust is collected in a 45-litre tank lined with a plastic bag. When full, the bag is closed and disposed of without the operator coming into direct contact with the dust. After the primary filter sits an HEPA H14 filter (99.995 % efficiency at MPPS per EN 1822-5) as the final stage, so the exhaust is clean even for fine or health-hazardous particles.