Depureco FOX 3 SP DEX 1/2D
- Continuous 24/7 operation with minimal operator load
- Fixed installation in Zone 21 where manual filter cleaning is impractical
- Low-staffing environments (evening/night shift)
- Fine dust where a star filter would clog in a few hours
- Production where filter cleaning must happen without interrupting flow
- ATEX Directive 2014/34/EU -- II 1/2D Ex htc IIIC T140°C Da/Dc
- EN 17348:2022 (harmonized March 2023)
- IEC 60335-2-69 (industrial vacuums)
Depureco FOX 3 SP DEX 1/2D
The FOX 3 SP DEX 1/2D combines Zone 21 certification with SP self-cleaning: a 90,000 cm2 cartridge filter with automatic reverse jet cleaning requires no manual intervention -- the machine maintains itself throughout operation. ATEX II 1/2D Ex htc IIIC T140°C Da/Dc (the external EPL drops to Dc because of the reverse-jet pulse), H14 HEPA filter included. 2.2 kW, 320 m3/h at 200 mbar, 100 L container, 80 mm inlet. The choice for continuous operation in Zone 21 without operator intervention in filter maintenance.
Applications
- Continuous 24/7 operation with minimal operator load
- Fixed installation in Zone 21 where manual filter cleaning is impractical
- Low-staffing environments (evening/night shift)
- Fine dust where a star filter would clog in a few hours
- Production where filter cleaning must happen without interrupting flow
Technical specifications
| ATEX marking | II 1/2D Ex htc IIIC T140°C Da/Dc |
|---|---|
| Internal / external zone | 20 / 21 |
| Motor type | Sidekanalblaeser 3-fase (2.2 kW) med intern cyklon-forseparation |
| 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 | Cartridge antistatisk polyester klasse M, 90.000 cm2, reverse jet cleaning (automatisk) + H14 absolutfilter 28.000 cm2 (inkluderet) |
| Primary filter | Cartridge antistatisk polyester klasse M, 90.000 cm2 |
| Cleaning system | Automatisk reverse jet cleaning |
| Collection system | Detachable container |
| Material | Lakeret staalkonstruktion, AISI 304 stoevbeholder |
| 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 1860 mm |
| Weight | 142 kg |
Questions and answers
Why does the SP variant carry ATEX Da/Dc when the machine is otherwise 1/2D?
It's a Depureco design choice: the reverse-jet pulse creates a brief pressure rise inside the filter housing that falls outside the normal duty envelope for Da/Db. So Depureco certifies the SP variant as II 1/2D Da/Dc -- internally Zone 20 and externally Zone 22 at EPL level, but still with the 1/2D category mark because all other 1/2D construction requirements are met. The question is whether that is acceptable for your zone classification. For most Zone 21 installations the answer is yes, because the reverse-jet event is short and controlled, and external Dc is sufficient when internal Da is verified. Verify with your ATEX officer.
How quickly does the reverse-jet system clean the filter?
The reverse-jet pulse lasts about 100-200 milliseconds per cartridge and targets one cartridge at a time in sequence. The whole cartridge pack is cleaned every 30-60 seconds under normal operation. The pressure source is an internal compressed-air reservoir (fed by an external 6 bar compressor). Filter pressure drop stays constant at around 30-50 mbar -- compare with the star filter on the FOX DEX, where pressure drop can rise to 150+ mbar before manual cleaning is performed.
Does the FOX SP need a compressed-air supply?
Yes. The reverse-jet system needs 6 bar dry compressed air -- typically from an external compressor with air filtration and oil-free conditioning. Consumption: about 150-200 litres/hour under normal operation. Compressed-air connection is 1/4'' or 3/8'' BSPT depending on model. If compressed air is not available, choose the standard FOX DEX (manual cleaning) instead.
Can I retrofit SP onto an existing FOX DEX?
No. SP and DEX variants have different filter housings -- the cartridge pack requires a larger chamber and taller chassis (1860 mm height versus 1510 mm on DEX). And the ATEX marking differs (Da/Dc versus Da/Db). They are two separate products, not an accessory. If you start with DEX and later want automatic cleaning, consider whether FOX 3 DEX 1/2D + a planned filter-cleaning routine can solve it before you invest in a new SP machine.