Delfin MTL 451 EX ATEX Zone 21 Industrial Vacuum for Combustible Dust
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A larger ATEX Zone 21 vacuum for heavier combustible dust loads
The Delfin MTL 451 EX is a single phase industrial vacuum for collecting non-reactive combustible dust where the area outside the machine is classified Zone 21. It has a 45 litre AISI 304 stainless steel tank, a 20,000 cm² antistatic Class M filter with a manual cleaning system, and an 80 mm suction inlet. The powerhead is Ex tb dust tight rated to IP64.
What each feature does for your site
- Category 1/2D marking, Zone 20 inside and Zone 21 outside — the machine is marked for the more demanding Zone 21 classification, so it can work in areas where dust clouds are expected in normal operation.
- Ex tb dust tight powerhead, IP64 — the motor head is certified for combustible dust atmospheres, so the machine can run in the area rather than outside it.
- Anti-spark, static dissipative accessories and non-metallic parts — these parts are tested for ignition risk, so hoses and tools do not become a source of static discharge.
- 20,000 cm² antistatic Class M star filter with manual cleaning — a large filter area with an operator-triggered clean, so airflow recovers without stripping the machine down.
- Standard H14 absolute filter — a second stage at 99.995% efficiency (MPPS, EN 1822-5), so less fine dust returns to the workplace air.
- 45 litre AISI 304 stainless steel tank — a non-combustible, easy-to-clean tank, so you hold more per load and clean down easily between dust types.
- 80 mm suction inlet — a wide inlet takes larger hoses and tools, so heavier dust moves quickly with less blockage.
Technical specifications
- Marking: II 1/2D Ex h tb IIIC T80°C (internal) / T95°C (external) Da/Db
- Hazardous location: Zone 20 internal, Zone 21 external (Category 1/2D)
- Voltage: 115/230 V, 50/60 Hz, single phase
- Power / current: 1.1 kW / 8 A
- Max vacuum: 2,250 mmH₂O
- Max airflow: 215 m³/h
- Suction inlet: 80 mm
- Capacity: 45 litres, AISI 304 stainless steel
- Primary filter: star type, polyester antistatic Class M (IEC 60335-2-69), 20,000 cm², 420 mm diameter
- Air load on filter: 108 m³/m²/h
- Filter cleaning: manual
- H14 absolute filter: standard, 20,600 cm², 99.995% on the MPPS method (EN 1822-5)
- Noise level: 74 dB(A) (EN ISO 3744)
- Dimensions: 55 x 69 x 147 cm
- Weight: 57 kg
- Accessories: accessory kit included
High reach cleaning in the same zone
Dust settles on beams, ducting and rafters as well as the floor. A certified high reach kit such as the SpaceVac 50 mm ATEX Pro kit or the SpaceVac ATEX Pro kit lets crews clean overhead surfaces from the ground in a Zone 21 area. This machine has an 80 mm inlet, so contact us and we will confirm the correct adaptor before you order.
Who it suits
Food, flour and sugar processing, timber and woodworking, pharmaceutical, chemical and plastics sites with a Zone 21 classification and larger volumes of dust. For a smaller unit, see the Delfin MTL 201 EX.
Frequently asked questions
Can I use it in a Zone 22 area?
Equipment marked for Zone 21 can also be used where Zone 22 is specified. Confirm the requirement with your safety officer or hazardous area assessor before ordering.
What does the 1/2D marking mean?
The first number is the protection category for the inside of the machine and the second is for the outside. 1/2D means Zone 20 inside and Zone 21 outside. The D means dust.
What dust can it collect?
The dry type is for non-reactive combustible dust such as flour, sugar, wood and plastics dust. It is not for reactive or self-igniting dusts such as aluminium or titanium. Delfin makes wet type vacuums with an inert neutralising system for those, so contact us if that is your dust.
Can it pick up liquids?
No. This model is for dry dust only. If you need an ATEX machine that also collects non-flammable liquids, see the Delfin MTL 801 WD EX.
Is the filter cleaned automatically?
No. The filter is cleaned manually. If you want built-in Dustop filter cleaning, see the Delfin MTL 201 EX.
What power supply does it need?
It runs on 115 or 230 V single phase and draws up to 8 A.
How much does freight cost?
At 57 kg this machine ships as freight. Send us your delivery postcode and we will quote it.