Delfin DM2 INERT 1/2D

ATEX Zone 21 vacuum cleaner with inert liquid bath for reactive and explosive dust

The Delfin DM2 INERT 1/2D is a powerful ATEX-certified industrial vacuum cleaner designed for the collection and neutralization of explosive and reactive dusts in Zone 21 environments. The system uses an inert oil bath that immediately encapsulates and cools the collected material, eliminating ignition risk. Certified by a Notified Body according to EN 17348, it is used in our solution “When a moment’s mistake turns explosive”, where inert technology prevents small handling errors from turning into explosive events.

• Zone classification: II 1/2D Ex h tb IIIC T80°C (Int) / T95°C (Ext) Da/Db
• Certified for Zone 20 (internal) / Zone 21 (external)
• 37 L inert oil bath – neutralizes reactive and gunpowder dust
• Twin bypass motors – single-phase 230 V / 2.2 kW – low noise level (74 dB(A))
• Airflow 430 m³/h • Vacuum 2250 mm H₂O • Inlet Ø 50 mm
• Container 100 L – AISI 304 stainless steel – INERT tank with 37 + 7 L capacity
• Filtration: Antistatic polyester M (30,000 cm²) + HEPA H14 (26,000 cm²)
• Manual filter cleaning with clogging indicator

Technical construction

The DM2 INERT 1/2D is equipped with two independent bypass motors that ensure strong and constant suction when handling high-density reactive dusts. The integrated INERT tank mixes the collected material with a neutral, non-conductive oil that displaces oxygen (< 10%) and prevents oxidation and self-ignition. The M-class antistatic star filter protects the motors, while the HEPA H14 filter provides final separation with 99.995% efficiency according to EN 1822-5.

Safety and certification

• ATEX Zone 21 (external) / Zone 20 (internal) – Certified LCIE DM2INERTZ21-001
• Complies with EN 17348 and EN IEC 62784:2018 for combustible and reactive dust
• Ex tb IP64 powerhead – dust-tight and fully grounded
• 37 L inert oil bath + 7 L safety volume for reactive materials
• Delivered with ATEX kit TA.1309.0000 and INERT tank included

Technical note

The DM2 INERT 1/2D is designed for high-risk applications where reactive dusts such as magnesium, aluminum, titanium, or unburned gunpowder can ignite under dry vacuuming. By submerging particles directly in oil, the system neutralizes heat and static charges, creating an oxygen-depleted, inert environment inside the collection tank. This technology plays a critical role in our “When a moment’s mistake turns explosive” solution, ensuring safety when handling combustible and reactive dust mixtures in Zone 21.

FAQ

When should an INERT vacuum cleaner be used?
When handling reactive dusts that can self-ignite or react under dry vacuuming – such as magnesium, aluminum, titanium, or gunpowder.

How is the dust neutralized?
It is collected directly into oil, which cools and isolates the particles while removing oxygen and static charge.

Is it suitable for Zone 21 areas?
Yes – the model is certified for Zone 20 (internal) / Zone 21 (external) and tested to EN 17348.

How is the filter cleaned?
Manually via the integrated shaking system with a clogging indicator.

Related links

• ATEX ABC
• Know your Ohm – Know your ATEX risk
• When a moment’s mistake turns explosive