Delfin MTL 3533 1/2D
ATEX Zone 21 vacuum cleaner for pharmaceutical and biotech production
The Delfin MTL 3533 1/2D is a powerful three-phase industrial vacuum cleaner designed for the safe collection of combustible or conductive dust in Zone 21 areas. Its stainless steel tank, antistatic filters and integrated H14 final filtration make it ideal for pharmaceutical, biotech, laboratory and food production environments where both hygiene and explosion safety are essential.
- Zone classification: II 1/2D Ex h IIIC T160°C Da/Db.
- Motor: Three-phase 400 V – 4 kW side channel blower (IP65).
- Filters: Antistatic polyester class M + HEPA H14 99.995% (EN 1822-5, MPPS method).
- Capacity: 45 L AISI 304 stainless steel tank with manual filter cleaning.
- Compliant with EN 17348 and EN IEC 62784:2018 for Zone 22 safety.
Technical construction
The integrated side channel blower ensures stable suction up to 2600 mm H₂O with an airflow of 320 m³/h. The antistatic polyester filter (20,000 cm²) efficiently captures dust and can be cleaned manually without compressed air. A final HEPA H14 filter with 27,100 cm² surface area, tested according to EN 1822 (99.995% MPPS), guarantees maximum filtration efficiency. The system is built on a solid steel frame and can be equipped with the antistatic D50 accessory kit TA.0201.0000.
Safety and certification
- ATEX marking: II 1/2D Ex h IIIC T160°C Da/Db.
- Zone 20 inside (Da) and Zone 21 outside (Db) – fully compliant with EN 17348.
- All electrical components are IP65 dust-tight and Ex Dust Tight certified.
- Tank and filter chamber in AISI 304 – all non-metallic parts ATEX-tested.
Technical note
When handling combustible or conductive dust in Zone 21, potential equalization, grounding resistance, and dust-tightness are crucial. The MTL 3533 1/2D meets EN 17348 and can safely collect combustible dust directly inside its internal Zone 20. Always use antistatic or conductive hoses and tools (below 10⁶ Ω). HEPA filter integrity should be tested regularly, and manual filter cleaning should follow manufacturer recommendations.
Need advice on ATEX vacuum systems?
We help you choose the right Zone 21 certified system, documentation and conductive accessories.
FAQ
What does II 1/2D (Zone 20/21) mean?
The certification ensures maximum protection inside the vacuum (Zone 20) and increased protection outside (Zone 21).
Can it be used in food or pharmaceutical production?
Yes – all dust-contact parts are made of AISI 304 stainless steel and easy to clean.
What filter class does it use?
HEPA H14 with 99.995% efficiency (EN 1822-5, MPPS method).
How is the filter cleaned?
Manually, using the external handle – no compressed air required.
Can I use standard hoses?
Only ATEX-certified antistatic hoses and conductive accessories are recommended.
Related links
Technical specifications
| Parameter | Value |
|---|---|
| ATEX marking (Int/Ext) | II 1/2D Ex h IIIC T160°C Da/Db |
| Zone classification | 20 (internal) / 21 (external) |
| Voltage / Frequency | 400 V – 50 Hz (3~) |
| Power / Current | 4 kW / 7.4 A |
| Max vacuum | 2600 mm H₂O |
| Max airflow | 320 m³/h |
| Inlet diameter | Ø 80 mm |
| Tank capacity | 45 L – AISI 304 stainless steel |
| Primary filter | Antistatic polyester M – 20,000 cm² / Ø 420 mm |
| Filter cleaning | Manual |
| HEPA final filter | H14 – 27,100 cm² – 99.995 % (MPPS) |
| Noise level | 69 dB(A) |
| Protection class | IP 65 |
| Material | AISI 304 stainless tank / steel frame with ESD parts |
| Dimensions (L×W×H) | 93 × 58 × 116 cm |
| Weight | 85 kg |
| Standards | EN 17348, EN IEC 62784:2018, EN 1822-5 |
| Accessories | Antistatic D50 kit TA.0201.0000 (optional) |
