NORRES AIRDUC® PUR 351 EC (MD)
Conductive PUR hose for ATEX zone 20-22 – MD
NORRES AIRDUC® PUR 351 EC (MD) is a medium-duty, electrically conductive PUR hose for ATEX zones 20-22. Developed for safe transport and extraction of abrasive powders, granulates, and gases in explosive environments, zone 20-22. Designed with conductive Pre-PUR® and spiral wire—used in industrial vacuum cleaners, vacuum systems, mines, silos, and for ventilation in explosion zones.
Read more about ATEX and zone classification.
Heavy-duty ATEX hose for throughput
AIRDUC® PUR 351 EC (MD) offers good abrasion resistance, resists oil, gasoline, and chemicals, and retains flexibility at low temperatures (−40 to +90°C). The hose handles industrial dust, granulates, gases, and bulk materials in ATEX zones. Static electricity and grounding are assured with spiral wire and conductive polyester.
Read about Ohm's importance for ATEX safety.
Certified safety in Ex environments
This hose is approved for ATEX zones 20, 21, and 22 (inside and aspiration), surface resistance < 10³ Ω according to ATEX 2014/34/EU and TRGS 727. Designed for safe transport of combustible dust, powder, and gases under ATEX regulation.
See how weak links can cause explosion hazards.
Flexible performance and temperature resistance
The hose has a medium profile, and the wall system ensures optimal bending radius and low weight. Available in various diameters and lengths—and can be customized on request. Complies with RoHS and REACH.
Do you need advice?
Contact us for guidance on selecting conductive PUR hose for ATEX zone 20-22 (MD), fittings, and safe grounding.
Technical note
TRGS 727 requires electrically conductive material (< 10⁶ Ω) for pneumatic transport of combustible dust. AIRDUC® PUR 351 EC (MD) meets all ATEX requirements and offers reliability in zone 20, 21, and 22. The hose has optimal abrasion layer and reinforcement and is tested for ATEX use.
FAQ: Conductive PUR hose for ATEX zone 20-22 MD
Which environments is it suitable for?
Used for industrial vacuum cleaners, vacuum systems, mines, silos, and transport of industrial dust and granulate in ATEX zones 20-22.
Is it ATEX approved?
Yes, the hose is certified for Zone 20, 21, and 22 according to ATEX 2014/34/EU and TRGS 727.
Can it be grounded?
Yes, the spiral wire and conductive wall system ensure ESD and ATEX zone management.
Is the hose food-approved?
No, AIRDUC® PUR 351 EC (MD) is only for industrial materials, not food contact.
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Technical specifications
| Internal diameter (mm) | External diameter (mm) | Pressure (bar) | Vacuum (bar) | Bending radius (mm) | Weight (kg/m) | Stock dimensions (m) | Production lengths (m) | Order No. |
|---|---|---|---|---|---|---|---|---|
| 25 | 32.00 | 2.445 | 1.000 | 23.00 | 0.20 | 10 | - | 351-0025-1003 |
| 30 | 38.00 | 1.945 | 1.000 | 26.00 | 0.26 | 10 | - | 351-0030-1003 |
| 32 | 40.00 | 1.830 | 1.000 | 27.00 | 0.28 | 10 | - | 351-0032-1003 |
| 38 | 46.00 | 1.550 | 1.000 | 31.00 | 0.32 | 10 | - | 351-0038-1003 |
| 40 | 48.00 | 1.475 | 1.000 | 32.00 | 0.34 | 10 | - | 351-0040-1003 |
