ATEX Zone 21 • Delfin • Mobile compact high-capacity
Delfin MTL201 1/2D LP
Mobile dust collector certified for ATEX Zone 21 with Longopac continuous bags for dust-free emptying. Compact design. H14 HEPA filter included. Third-party certified — ideal for continuous collection of hazardous dust without operator exposure during emptying.
- ATEX Zone 21 third-party certified per EN 17348:2022
- Category 1/2D — approved for both Zone 1 gas and Zone 21 dust
- Longopac continuous bags for dust-free emptying without operator exposure
- H14 HEPA absolute filter for 99.995% particle retention
- Single-phase vacuum motor — flexible power supply (115/230 V)
- Compact and mobile — 70 kg, 215 m³/h airflow
Features and Technology
The Delfin MTL201 1/2D LP is a mobile dust collector designed for permanent installation in ATEX Zone 21 areas. Zone 21 means explosive dust-air mixtures can occur 10-1,000 hours per year under normal operation — a higher risk than Zone 22 requiring more robust construction. The unit is third-party certified per EN 17348:2022 and EU Directive 2014/34/EU as category 1/2D, meaning it is approved for both gas (Zone 1) and dust (Zone 21) explosive atmospheres.
The central innovation of the MTL201 1/2D LP is the Longopac continuous bag system for dust-free emptying. The bag rolls continuously during collection, and when full, the system automatically advances to the next layer without manual handling of hazardous dust. This completely eliminates operator exposure during emptying — critical in Zone 21 environments. The H14 HEPA filter ensures 99.995% particle retention even at very high concentrations. The single-phase vacuum motor provides flexibility for different power supplies (115/230 V).
The compact design (80 x 66 x 157 cm, 70 kg) makes the unit mobile and easy to position in different areas. With 215 m³/h airflow and 2,250 mmH₂O maximum vacuum, it is ideal for continuous collection of hazardous dust from process equipment, silos, and other Zone 21 sources. The 20 L collection hopper is sized for efficient emptying without frequent handling.
Technical Specifications
| Parameter | Value |
|---|---|
| ATEX certification | II 1/2D Ex h tb IIIC T80°C (Int) / T95°C (ext) Da/Db |
| ATEX category | EX 21 1/2D — Zone 21 external / Zone 20 internal |
| Zone approval | Zone 1 gas + Zone 21 dust |
| Standard | EN 17348:2022 DT — Combustible dust collection |
| Motor type | Single-phase vacuum motor — Ex tb IP64 |
| Power | 1.1 kW |
| Current | 8 A |
| Voltage | 115/230 V, 50/60 Hz, single-phase |
| Max airflow | 215 m³/h |
| Max vacuum | 2,250 mmH₂O |
| Inlet | Ø80 mm (LP variant with larger inlet) |
| Filter type | H14 HEPA absolute filter — 99.995% at MPPS |
| Filter medium | Star/pocket filter, polyester ANT M |
| Filter surface | 30,000 cm², Ø500 mm |
| HEPA filter surface | 26,000 cm² |
| Filter cleaning | Manual |
| Emptying system | Longopac continuous bags — included |
| Hopper | Conductive powder-coated collection container |
| Tank capacity | 20 L |
| Noise level | 74 dB(A) per EN ISO 3744 |
| IP class | IP64 (vacuum head) |
| Dimensions (W x D x H) | 80 x 66 x 157 cm |
| Weight | 70 kg |
| Accessories included | Accessory kit TA.0527.0000 |
Frequently Asked Questions
ATEX Zone 21 means explosive dust-air mixtures can occur 10-1,000 hours per year under normal operating conditions. This is a higher risk level than Zone 22 and requires more robust and heavier construction. The MTL201 1/2D LP is a Zone 21 unit — higher rated than most standard industrial vacuums available on the market.
Longopac continuous bags use a roll-bag design where the bag advances automatically as dust collects. When a section fills, the system moves to the next layer without manual handling. This system ensures dust-free emptying without the operator ever touching the collected hazardous material — ideal for dangerous dust types.
Dust-free emptying minimizes operator exposure to hazardous dust during the emptying process. With the Longopac system, emptying occurs automatically and safely without inhalation risk or skin contact. This is especially critical in Zone 21 areas with combustible dust where even minimal exposure can pose serious health and safety risks.
An H14 HEPA filter is the highest-class absolute filter that retains 99.995% of particles as small as 0.3 micrometers at maximum particle size (MPPS). It ensures that even microscopic and dangerous particles do not escape with the exhaust air. The MTL201 1/2D LP includes the H14 HEPA filter as standard at no additional cost.
Yes. The MTL201 1/2D LP is third-party certified by IMQ, an accredited notified body under ATEX Directive 2014/34/EU. You receive complete EU documentation, certification, and technical file confirming Zone 21 and II 1/2D classification. IECEx approval (Da/Db) ensures international recognition. Installation must follow ATEX guidelines.
The MTL201 1/2D LP includes Longopac continuous bags for dust-free emptying, is fully ATEX Zone 21 certified (1/2D category), and comes with H14 HEPA filter as standard. It is specifically designed for continuous collection of hazardous dust with a focus on operator safety during emptying. Standard MTL201 lacks this specialization and certification.
The Longopac system completely eliminates manual dust handling. The bag advances automatically as dust collects, and the operator never contacts the collected material. This minimizes inhalation risk and exposure to combustible dust, which is essential in Zone 21 environments where safety and regulatory compliance are paramount.
Need Zone 21 certification?
Contact our ATEX specialists to discuss your Zone 21 application and receive a detailed configuration, Longopac emptying strategy, and pricing based on your specific needs.
