NORRES AIRDUC® PUR 350 AS (MD)
Antistatic PUR hose for ATEX Zone 22 and industrial extraction
NORRES AIRDUC® PUR 350 AS (MD) is a flexible and highly durable antistatic polyurethane hose (Pre-PUR®) designed for conveying, extraction and ventilation in industrial environments with explosion risk due to combustible dusts.
It is ideal for the transport of dust, powder, granulates and vapours in chemical, electronics, printing, surface treatment and textile industries.
Flexible and robust construction
The AIRDUC® profile consists of an embedded spring steel wire (1) and an antistatic ester-PUR wall (2) with a smooth inner surface (3), providing low weight, high flexibility and excellent airflow.
The hose is microbe-resistant, oil- and chemical-resistant, and flame-retardant according to UL94-V2 and DIN 4102-B1.
Temperature range: −40 °C to +90 °C (short-term up to +125 °C).
Wall thickness approx. 0.7 mm.
Approvals and standards
Antistatic according to ISO 8031 (electrical and surface resistance < 10⁹ Ω).
Suitable for ATEX Zone 22 (inside for dust) as well as Zone 1 and 2 (for gases and vapours) according to TRGS 727 and ATEX 2014/34/EU.
Complies with RoHS and REACH and meets the safety requirements of the German Wood Trade Association (BG Holz).
Standard: DIN 26057 Type 2.
Applications
Typical applications include:
- Extraction and conveying of dust, powder and granulates in ATEX Zone 22
- PCB and printing machines (air supply and exhaust)
- Extraction from spray booths, blasting systems and grinders
- Ventilation in cleanrooms and semiconductor production
- Connection to compressors, vacuum pumps and blowers
- Industrial sweepers and cleaning systems
Recommended accessories
For safe installation and proper grounding, the following NORRES accessories are recommended:
- CLAMP 213 / 217 / 210 – stainless steel hose clamps for industrial use
- CONNECT 245 AS / 246 AS – antistatic couplings for ATEX applications
- CONNECT 270-271 – standard stainless steel couplings
- CONNECT 240 + 241 AS – transition and connection fittings
Need technical advice?
Contact us for guidance on selection, installation and integration of flexible antistatic hoses for extraction, ventilation and process systems.
FAQ: NORRES AIRDUC® PUR 350 AS (MD)
What is the hose used for?
For extraction and conveying of dust, powder and granulates in ATEX Zone 22.
Is it flame-retardant?
Yes – it meets UL94-V2 and DIN 4102-B1.
Is it electrically conductive?
No – the hose is antistatic (< 10⁹ Ω) and suitable for Zone 22, not for Zone 20.
Related links
Technical specifications
| Inside diameter (mm) | Outside diameter (mm) | Pressure (bar) | Weight (kg/m) | Length (m) | Order no. |
|---|---|---|---|---|---|
| 25 | 32.0 | 2.45 | 0.20 | 5–15 | 350-0025-1002 |
| 32 | 39.0 | 1.93 | 0.25 | 5–15 | 350-0032-1002 |
| 38 | 45.0 | 1.64 | 0.29 | 5–15 | 350-0038-1002 |
| 50 – 51 | 57.0 | 1.25 | 0.38 | 5–15 | 350-0050-1002 |
| 65 | 70.0 | 0.97 | 0.48 | 5–15 | 350-0065-1002 |
| 75 – 76 | 82.0 | 0.84 | 0.55 | 5–15 | 350-0075-1002 |
| 100 – 102 | 107.0 | 0.64 | 0.85 | 5–15 | 350-0100-1002 |
| 125 – 127 | 132.0 | 0.51 | 1.05 | 5–15 | 350-0125-1002 |
| 150 – 152 | 157.0 | 0.43 | 1.28 | 5–15 | 350-0150-1002 |
| 200 – 203 | 207.0 | 0.32 | 1.70 | 5–15 | 350-0200-1002 |
| 250 | 257.0 | 0.26 | 2.11 | 5–15 | 350-0250-1002 |
Recommended operating limits for pressure and vacuum. Bending radius measured through the inner hose curve. Subject to technical modifications. All values at 20 °C.
