Depureco DF 22 DEX 3/3G
- Fixed installation in gas-classified Zone 2 (internal and external)
- Dust collection in plants where the surroundings may also contain flammable gas or vapour
- Process venting on refinery and chemical plants
- Collection of technical dust in environments with periodic gas risk
- Dust collector in plants where dual certification (gas + dust) is specified
- ATEX Directive 2014/34/EU -- II 3/3G Ex h IIB T3 Gc/Gc
- EN 17348:2022 (harmonized March 2023)
- IEC 60335-2-69 (industrial vacuums)
Depureco DF 22 DEX 3/3G
The Depureco DF 22 DEX 3/3G is a stationary dust collector certified for gas-classified Zone 2 (ATEX II 3/3G Ex h IIB T3 Gc/Gc). A 2.2 kW ATEX-certified centrifugal fan delivers up to 1,400 m3/h at 350 mmH2O vacuum through a 24,000 cm2 star filter in antistatic polyester M class. The variant is used in plants where the surrounding environment may contain flammable gas or vapour (gas group IIB, T3), even though the process itself is dust-based -- typically refinery, petrochemical and chemical production. 65 L detachable AISI 304 bin. Grounding included.
Applications
- Fixed installation in gas-classified Zone 2 (internal and external)
- Dust collection in plants where the surroundings may also contain flammable gas or vapour
- Process venting on refinery and chemical plants
- Collection of technical dust in environments with periodic gas risk
- Dust collector in plants where dual certification (gas + dust) is specified
Technical specifications
| ATEX marking | II 3/3G Ex h IIB T3 Gc/Gc |
|---|---|
| Internal / external zone | 2 / 2 |
| Motor type | 3G ATEX-certificeret centrifugalventilator, 2,2 kW |
| Duty cycle | Continuous |
| Airflow | 1400 m³/h |
| Vacuum | 34.3 mbar (350 mmH₂O) |
| Container | 65 L |
| Sound pressure | 73 dB(A) |
| Filter class | M class |
| Filter type | Stjernefilter antistatisk polyester klasse M, 24.000 cm2 (IFA/BGIA M-PES per EN 60335-2-69) |
| Primary filter | Stjernefilter antistatisk polyester klasse M, 24.000 cm2 |
| Cleaning system | Manuel filterrens |
| Collection system | Detachable container |
| Material | AISI 304 rustfrit staalbeholder + lakeret staal-filterhus |
| IP class | IP55 |
| Power | 2.2 kW |
| Voltage | 400 V / 50-60 Hz |
| Dimensions (L × W × H) | 660 x 800 x 1630 mm |
| Weight | 120 kg |
Questions and answers
What does the ATEX marking II 3/3G Ex h IIB T3 Gc/Gc mean?
The model is EU type-approved under ATEX directive 2014/34/EU for stationary operation in gas-classified Zone 2 (internal and external). 'Ex h' is the construction protection type per EN ISO 80079-36/37. 'IIB' covers gas group IIB (e.g. ethylene, acetaldehyde). 'T3' is the temperature class (maximum surface temperature 200 degrees C). 'Gc/Gc' is the EPL code for gas Zone 2. This variant is used in plants where the surrounding environment may contain flammable gas or vapour.
How does the DF 22 DEX 3/3G differ from the other variants in the same kW class?
Depureco offers DF 22 DEX in three variants with the same chassis, same fan (2.2 kW) and same bin -- but different certification and filter configurations. **DEX 1/3D variant** has a star filter and manual filter cleaning; it covers dust Zone 22 external + Zone 20 internal. **SP ATEX variant** has 3x cartridge filter (90,000 cm2) and automatic reverse-jet cleaning for high dust loads -- dust Zone 22 external. **DEX 3/3G variant** is certified for gas Zone 2 instead (II 3/3G), for plants where the surrounding environment has gas risk even though the process is dust-based. All three share the same chassis construction but have different product codes.
Which filter option should I choose for fine-particle emissions?
The standard configuration is the star filter M class (24,000 cm2, antistatic polyester). For fine-particle emissions or emission requirements below 0.1 mg/m3, Depureco offers a HEPA H13 secondary filter option (120,000 cm2 fibreglass). The combination gives a filter stack that meets requirements for hazardous, pharmaceutical or metallic fine dust. A PTFE antistatic membrane option (38,000 cm2) is also available for dusts with high binding properties.
Can the DF 22 DEX 3/3G be installed outdoors or in humid environments?
Yes -- IP55 enclosure and insulation class F make it suitable for outdoor installation under a canopy or in humid production environments. Operating temperature range is -20 to +40 degrees C per catalogue. For permanent outdoor installation, the GX option (AISI 304 stainless steel filter chamber + bin) is recommended as corrosion protection. Ensure that grounding is maintained and drainage from the filter housing works in case of condensation.
Does Particulair handle installation?
Yes. We offer both installation and commissioning of central ATEX plants and mobile solutions, and ensure that the equipment is installed correctly, documented and adjusted to your environment. Installation is carried out in collaboration with your own electrical and piping trades -- we deliver the plant, the ATEX documentation and the technical commissioning, and we verify grounding, safety valve and pipe sizing before start-up. See 'About Particulair' for our geographic coverage.
What does service and maintenance look like after delivery?
We stay around. Particulair offers service agreements on both central plants and mobile solutions, ensuring that all equipment is continuously maintained and complies with applicable requirements -- including ATEX inspection, filter replacement and annual servicing. A typical service agreement covers scheduled inspections, spare parts access and documentation maintenance. Contact us for a specific agreement tailored to your plant and duty cycle.