Delfin DG 300 HD PN ACD
ACD industrial vacuum cleaner for combustible dust in non ATEX-classified areas
The Delfin DG 300 HD PN ACD is a high-performance three-phase industrial vacuum cleaner designed for continuous collection of combustible or hazardous dust in ordinary (non-ATEX-classified) areas. The unit is tested according to IEC 60335-2-69 Annex AA (ACD – Applied for Combustible Dust) and equipped with a fully automatic filter cleaning system using compressed air (PN – Pneumatic Cleaning). The integrated compressor ensures effective filter cleaning during operation, while the H14 HEPA filtration and ATEX-certified cleaning system provide reliable safety and air purity even under heavy-duty use.
- ACD classification according to IEC 60335-2-69 Annex AA – for combustible dust handling outside ATEX zones.
- Motor: three-phase 400 V – 25 kW – 78 dB(A) – with PTC thermal protection and IP65 electrical rating.
- Filter: four antistatic cartridge filters (polyester M-class) + HEPA H14 final filter (99.995%).
- Automatic PN cleaning system with compressed air – integrated compressor included.
- Container: 220 L – painted steel standard / optional AISI 304 stainless steel.
- Filter surface: 260,000 cm² (primary) + 103,500 cm² (HEPA H14 99.995%).
Technical construction
The DG 300 HD PN ACD is equipped with a powerful side channel blower for continuous 24/7 operation, providing a vacuum of up to 4,000 mm H₂O (continuous 3,100 mm H₂O) and an airflow of 2,050 m³/h. The four cartridge filters are cleaned automatically by compressed air pulses during suction, maintaining constant airflow and filtration efficiency. The robust steel structure features forklift intakes and large wheels for easy movement. It can be used as a central vacuum system or as a fixed unit serving multiple operators simultaneously.
Safety and filtration
- Antistatic M-class primary filter and H14 HEPA final filter according to EN 1822-5.
- ATEX-certified filter cleaning system with compressed air cleaning (PN).
- Electrical protection IP65 and PTC thermal motor sensor for overheating control.
- Integrated compressor allows continuous operation without suction loss.
Technical note
The Delfin DG 300 HD PN ACD is an ACD-classified vacuum cleaner intended for environments where dust is combustible, but the atmosphere is not classified as an ATEX zone. It complies with IEC 60335-2-69 Annex AA for containment, filtration, and safe handling of combustible dust. The pneumatic cleaning system maintains full suction power during operation and is particularly suitable for heavy-duty applications such as metal dust, pharmaceutical production, and chemical processing. The stainless steel version (AISI 304) is recommended for hygienic or corrosive environments.
Unsure about ACD vs. ATEX?
Read how IEC 60335-2-69 (Annex AA) differs from ATEX, and when ACD vacuums can safely be used for combustible dust applications.
FAQ
What does PN mean?
PN stands for pneumatic cleaning – automatic filter cleaning using compressed air during suction to maintain consistent vacuum performance.
Is the DG 300 HD PN ACD ATEX certified?
No, it is ACD-classified and designed for non-zoned environments. Only the filter cleaning system is ATEX certified.
What is the difference between AUT and PN?
AUT is mechanical cleaning, while PN uses compressed air during suction – ideal for continuous operation and heavy dust loads.
Can it be used as a central vacuum system?
Yes – with its 25 kW side channel blower and 2,050 m³/h airflow, it supports multi-user operation.
What filter class does it have?
HEPA H14 (99.995%) according to EN 1822-5, MPPS method.
Related links
Technical specifications
| Specifications | Data |
|---|---|
| ACD classification | IEC 60335-2-69 Annex AA – Applied for Combustible Dust |
| Voltage / Frequency | 400 V – 50 Hz (3~) |
| Power / Current | 25 kW / 46 A |
| Electrical protection | IP 65 – PTC motor protection |
| Max vacuum | 4,000 mm H₂O (3,100 mm continuous) |
| Max airflow | 2,050 m³/h |
| Inlet diameter | Ø 120 mm |
| Container capacity | 220 L – steel / optional AISI 304 stainless steel |
| Primary filter | 4 × cartridges – antistatic polyester M-class |
| Filter surface (primary) | 260,000 cm² / Ø 780 mm |
| Cleaning system | PN – automatic compressed air cleaning (integrated compressor) |
| HEPA filter | H14 – 103,500 cm² – 99.995% (MPPS) |
| Noise level | 78 dB(A) |
| Dimensions (L×W×H) | 92 × 220 × 220 cm |
| Weight | 825 kg |
| Accessories | Conductive hoses and tools (optional) |
