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- Antistatic Class M + polypropylene 2nd stage + liquid separator
- Accessory tool kit + 2-in hose — ATEX docs on request
Industrial Vacuum Cleaners, Additive Manufacturing Solutions, ATEX-rated units, Combustible-dust certified, For Reactive Metal Powders, Fume & filtration, Metal-safe vacuums
Delfin Mistral 451 BL Inert Vacuum – Reactive Metal Powder for 3D Printing | Immersion Separation
Immersion-separation industrial vacuum for reactive metal powder — aluminium, titanium and similar alloys — in 3D printing and powder handling. Captures powder under liquid so it's never a dry, ignition-sensitive cloud. ATEX-rated, antistatic, single-phase.
- ✓ For reactive AM powder (Al, Ti, Mg) — the safe alternative to a dry vacuum
- ✓ Two-stage antistatic filtration + grounded construction · ATEX docs on request
- ✓ In US stock · ships in 2 business days · genuine Delfin unit
$11,391
Price held 7 days after order.
Ships from US stock in 2 business days
Genuine Delfin · ATEX docs on request
What your safety officer actually checks
What your safety officer actually checks
Wet capture for reactive metal, honestly matched
Reactive metal powder — aluminium, titanium, magnesium — is dangerous to collect dry. The Mistral 451 BL Inert uses immersion separation to capture it under a liquid bath, so it never forms a dry, airborne, ignition-sensitive cloud, backed by ATEX-rated antistatic construction. It is the unit for reactive AM alloys. If your metal is non-reactive but combustible, we route you to the dry D2 ATEX unit instead of an inert one you don't need.
An applications engineer on the line
Questions on alloy reactivity, immersion liquid, or ATEX documentation for your reactive-metal AM line? A named applications engineer answers directly — most replies under 4 hours, NDA standard. We run metal AM powder handling in our own California shop.
About this product
The Delfin Mistral 451 BL Inert is the safe way to vacuum reactive metal powder — aluminium, titanium and similar alloys — in 3D printing and powder-handling environments. Instead of collecting dry powder in a bag, it uses immersion separation: the powder is drawn in and captured under a liquid bath, so it is never left as a dry, airborne, ignition-sensitive cloud. Combined with ATEX-rated, antistatic construction, that makes it the unit for depowdering and clean-down around LPBF and DMLS printers running reactive alloys. A 1.1 kW motor, 2-inch inlet and 2-gallon liquid separator handle the job on standard single-phase power.
Why teams choose the Mistral 451 BL Inert
What a safety officer checks before vacuuming reactive metal powder.
Immersion separation for reactive powder
Powder is captured under a liquid bath rather than a dry bag, so aluminium and titanium fines are never left as an airborne, ignition-sensitive cloud.
ATEX-rated, antistatic build
Conductive, grounded construction and an antistatic Class M filter (IEC 60335-2-69) keep static from accumulating around reactive metal powder.
Two-stage filtration
A 22 ft² antistatic star primary filter is backed by a polypropylene second-stage filter, so fine reactive powder is captured through the full path.
Single-phase & mobile
A 1.1 kW motor on standard single-phase power, with a 2-gallon liquid separator and 1-gallon dry capacity, on casters to move to the printer. 77 dB(A).
How immersion separation works
Why reactive powder needs a wet-capture unit, not a dry ATEX vacuum.
Step 01
Draw the powder in
Reactive metal powder — aluminium, titanium — is picked up through the 2-inch inlet during depowdering or clean-down.
Step 02
Immerse under liquid
The powder is separated into a liquid bath rather than a dry container, so it is wetted immediately and never forms a dry cloud.
Step 03
Store & dispose safely
The powder stays under liquid for safe handling and disposal, with antistatic, grounded construction throughout the path.
Technical specifications
| Specification | Mistral 451 BL Inert |
|---|---|
| Certification | ATEX – inert / immersion separation |
| Voltage | 115 V (single phase) |
| Power consumption | 1.1 kW |
| Max water lift | 90.6 in |
| Max airflow | 121.8 CFM (207 m³/h) |
| Suction inlet | 2 in |
| Liquid (oil) capacity | 2 gal |
| Dry capacity | 1 gal |
| Primary filter | Star – IEC 60335-2-69 antistatic polyester, Class M |
| Filter surface area | 22 ft² |
| 2nd-stage filter | Polypropylene |
| Cleaning system | Manual |
| Noise level (EN ISO 3744) | 77 dB(A) |
| Country of origin | Italy |
Where it fits
Reactive metal powder in additive manufacturing and the lab.
Titanium AM powder
Ti-6Al-4V and other reactive titanium alloys
Aluminium AM powder
AlSi10Mg and other reactive aluminium alloys
LPBF / DMLS depowdering
Clean-down around reactive-alloy metal printers
Powder handling labs
Safe capture of reactive fines in R&D
Magnesium alloys
Reactive magnesium powder requiring inert capture
Spill & EHS cleanup
Certified housekeeping around reactive-metal AM
Not sure the inert Mistral is the right unit?
Combustible but non-reactive dust, a smaller ATEX unit, or high-volume pickup.
Non-reactive / combustibleMistral 451 BL D2View unit →
Smaller ATEXMistral 300 BL D2Compare →
High volumeDG 70Compare →
Smaller ATEXMistral 300 BL D2Compare →
High volumeDG 70Compare →
Tell us the alloy, particle size and where the powder is generated — an applications engineer confirms whether the inert Mistral is right for your reactive metal, or points you to the D2 unit for non-reactive combustible dust. Typical reply under 24 hours, NDA standard.
Why source through Additive Plus
- We run metal AM powder handling in our own California shop — we match the capture method to your alloy’s reactivity, not to a catalog line.
- Genuine Delfin unit with US-based support, ATEX documentation on request, and consumables (filters, liquid) in stock.
- Honest fit check — if your metal is non-reactive, we tell you and route you to the dry D2 unit instead of an inert one you don’t need.
- Ships from US inventory · sub-24h engineer response · NDA standard on every project.
| Brand | Delfin |
| Voltage | 115 V |
| Power Consumption | 1,1 kW |
| Max Water Lift | 90.6 in |
| Max Airflow | 121.8 (207) CFM (m³/h) |
| Suction Inlet | 2 in |
| Oil Capacity | 2 gal |
| Dry Capacity | 1 gal |
| Noise Level (EN ISO 3744) | 77 dB(A) |
| Primary Filter Type | Star |
| Material - Efficiency | IEC 60335-2-69 Antistatic Polyester - Class M |
| Filter Surface Area | 22 ft² |
| 2nd Stage Filter | Polypropylene |
| Cleaning system | Manual |
| Country of origin | Italy |
Handling reactive metal powder?
ATEX documentation Alloy reactivity checkHandling & disposal guidance
We supply the ATEX documentation, confirm whether your alloy needs inert capture, and advise on safe handling and disposal of reactive metal powder — just ask when you order.
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In stock
· 2 Business DaysFrom teams running the Mistral 451 Inert
Unedited feedback from AM safety and production leads.
★★★★★
We depowder titanium next to the LPBF machines — the immersion capture means we're not moving dry reactive powder around in a bag.
PS
Priya S. AM Safety Lead · Aerospace AM
★★★★★
The inert unit was non-negotiable for our aluminum line. Additive Plus supplied the ATEX paperwork our auditor wanted.
TH
Tom H. Process Engineer · Metal AM
★★★★★
Straight advice — they confirmed our alloy was reactive and steered us to this over the cheaper dry unit. Right call.
IM
Ines M. EHS Manager · Powder metallurgy
Common questions
Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What is the Mistral 451 BL Inert designed for?
The Mistral 451 BL Inert is an industrial vacuum for the safe capture of reactive metal powder — aluminium, titanium and similar alloys — in 3D printing and powder-handling environments. Rather than collecting dry powder in a bag, it uses immersion separation to capture the powder under a liquid bath, keeping it wetted and inert. It is designed for depowdering and clean-down around LPBF and DMLS printers running reactive alloys. For non-reactive but combustible dust, use the dry ATEX D2 unit instead.
How does immersion separation make reactive powder safe?
Reactive metal powders can ignite when they are fine, dry and airborne. The Mistral 451 BL Inert draws the powder in and separates it into a liquid bath instead of a dry container, so the powder is wetted on capture and never accumulates as a dry cloud or dry cake. Combined with antistatic, grounded construction that prevents static build-up, this removes the main ignition pathways. The powder then stays under liquid for safer handling and disposal.
Which metals count as reactive and need this unit?
Reactive metal powders include aluminium (for example AlSi10Mg), titanium (for example Ti-6Al-4V) and magnesium alloys — powders that can react with air or moisture and are dangerous to collect dry. These need the inert immersion Mistral. Non-reactive metal powders such as stainless steel and nickel alloys can be handled with the dry ATEX D2 unit. If you are not certain how your alloy is classified, send Additive Plus the material and particle size and an engineer will confirm which unit is appropriate.
How is it different from the Mistral 451 BL D2?
Both are metal-safe Delfin vacuums, but for different hazards. The Mistral 451 BL Inert captures reactive metal powder — aluminium, titanium — under liquid by immersion separation, so it is never exposed to air. The Mistral 451 BL D2 is a dry ATEX vacuum for combustible dust and non-reactive metal powder such as stainless and nickel, using antistatic construction to avoid ignition. Choose the inert unit for reactive metals and the D2 for non-reactive/combustible dust; an engineer can confirm which your alloy needs.
Is it ATEX-rated, and can you supply documentation?
Yes. The Mistral 451 BL Inert is built with ATEX-rated, antistatic and grounded construction for use around reactive metal powder, and Additive Plus can supply the relevant documentation on request — what an EHS team or safety auditor needs to justify the unit for a reactive-powder area. We can also help confirm your alloy's reactivity and advise on handling and disposal of the immersion liquid. Ask us when you order and we will include the paperwork.
What are the suction and capacity specs?
The Mistral 451 BL Inert runs a 1.1 kW motor delivering 121.8 CFM (207 m³/h) of airflow at 90.6 in of water lift through a 2-inch inlet. It has a 2-gallon liquid (oil) separator capacity and 1-gallon dry capacity, with a 22 ft² antistatic Class M star primary filter and a polypropylene second-stage filter. That airflow is tuned for controlled depowdering of reactive metal rather than bulk high-volume pickup. Measured noise is 77 dB(A) per EN ISO 3744.
What maintenance and consumables does it need?
Plan to top up or change the immersion liquid, empty the captured powder under controlled conditions, and reorder the antistatic Class M primary filter and polypropylene second-stage filter on a schedule set by your usage. Filter cleaning is manual. Additive Plus stocks genuine Delfin filters and consumables in the US so you can reorder without downtime, and can recommend a maintenance and disposal schedule appropriate to your reactive alloy.
Place your order, or talk to an engineer first
Order Delfin Mistral 451 BL Inert Vacuum – Reactive Metal Powder for 3D Printing | Immersion Separation direct, or talk to materials engineer