Depureco FOX 3 DEX 1/2D
- Single operator station in Zone 21 with HEPA exhaust
- Paper, cellulose, wood dust and coarse filler (cyclone catches the coarse fraction)
- Polymer and plastics production with mixed grain sizes
- Laboratory or R&D environment where the machine itself must sit in Zone 21
- Replacement of 1/3D unit when an area is reclassified to Zone 21
- ATEX Directive 2014/34/EU -- II 1/2D Ex htc IIIC T140°C Da/Db
- EN 17348:2022 (harmonized March 2023)
- IEC 60335-2-69 (industrial vacuums)
Depureco FOX 3 DEX 1/2D
The FOX 3 DEX 1/2D is the entry point to the Zone 21 class: same FOX chassis with internal cyclone pre-separation as its 1/3D sibling, but with ATEX II 1/2D Ex htc IIIC T140°C Da/Db -- meaning the exterior is cleared for Zone 21, not just Zone 22. 2.2 kW side-channel blower, 100 L AISI 304 container, 80 mm tangential inlet, 320 m3/h at 200 mbar. The H14 absolute filter (28,000 cm2) is included as standard -- not an option, as it is on the 1/3D variant. Well suited for a single operator station in Zone 21 where dust has mixed grain sizes and HEPA-grade exhaust is needed without detours.
Applications
- Single operator station in Zone 21 with HEPA exhaust
- Paper, cellulose, wood dust and coarse filler (cyclone catches the coarse fraction)
- Polymer and plastics production with mixed grain sizes
- Laboratory or R&D environment where the machine itself must sit in Zone 21
- Replacement of 1/3D unit when an area is reclassified to Zone 21
Technical specifications
| ATEX marking | II 1/2D Ex htc IIIC T140°C Da/Db |
|---|---|
| Internal / external zone | 20 / 21 |
| Motor type | Three-phase side-channel blower (2.2 kW) with internal cyclone pre-separation |
| Duty cycle | Continuous |
| Airflow | 320 m³/h |
| Vacuum | 200 mbar (2039 mmH₂O) |
| Container | 100 L |
| Sound pressure | 73 dB(A) |
| Filter class | M class |
| Filter type | Antistatic polyester star filter, class M, 24,000 cm2, manual cleaning + H14 absolute filter 28,000 cm2 (included) |
| Primary filter | Antistatic polyester star filter, class M, 24,000 cm2 |
| Cleaning system | Manuel filterrens |
| Collection system | Detachable container |
| Material | Painted steel construction, AISI 304 dust container |
| IP class | IP65 |
| Power | 2.2 kW |
| Voltage | 400 V / 50-60 Hz |
| Inlet | Ø 80 mm |
| Dimensions (L × W × H) | 660 x 1200 x 1510 mm |
| Weight | 142 kg |
Questions and answers
Why choose 1/2D over 1/3D when the price is higher?
The 1/2D marking (Da/Db external) means the exterior of the machine may also stand in Zone 21 -- that is, areas where an explosive dust cloud may occur during normal operation. 1/3D (Da/Dc) assumes the machine exterior only stands in Zone 22, where dust clouds occur only rarely and briefly. If your ATEX zoning has identified Zone 21 outside the machine, 1/2D is a requirement, not a choice. In doubt: consult your ATEX document or call us.
What extra do I get compared to the FOX 3 DEX 1/3D?
Two concrete differences: (1) ATEX II 1/2D Da/Db instead of II 1/3D Da/Dc -- so the exterior may stand in Zone 21. (2) The H14 absolute filter (28,000 cm2) is included as standard, whereas it is optional on 1/3D. Motor, cyclone, container, suction and dimensions are identical -- the difference lies in certification and the filter baseline. The part code is A087 for 1/2D versus A115 for 1/3D.
Can I retrofit the absolute filter onto an existing 1/3D unit myself?
Technically yes -- the filter housing is the same. But you do not gain 1/2D certification on a 1/3D unit by adding a filter. The ATEX marking is on the nameplate and derives from the whole machine's construction, not individual components. If the external zone is Zone 21, the machine must be a factory-certified 1/2D unit.
How much hose can I pull with 2.2 kW?
Rule of thumb: 320 m3/h at 200 mbar sustains one 80 mm collection point with 3-5 m hose for dust up to about 1 mm grain size. Beyond 5 m hose or finer dust (<50 micron), vacuum becomes the limiting factor -- choose the FOX 7.5 (240 mbar) or FOX 10 (280 mbar). Branching to two simultaneous points is possible only if each point is active less than 50% of the time.
Is the FOX 3 DEX 1/2D suitable for organic dust like flour and sugar?
Yes, especially with cyclone pre-separation. Organic dust typically has an ignition temperature above 200°C (sugar about 360°C, wheat flour about 380°C), so the T140°C margin is ample. 1/2D certification is relevant if dust accumulates outside the machine during normal operation -- typically at belt transfers, sieving or bag opening stations. Grounding of hose and chassis is mandatory.