Explosion-Proof FFU | ATEX/IECEx Certified for Hazardous Zones | Oil & Gas Grade HEPA Filtration & Corrosion Resistance

The Explosion-Proof FFU 1175X1175X380 sets a new safety benchmark for oil refineries, chemical processing plants, and grain silos operating in Class I/II Division 1 hazardous environments. Engineered with 4mm 316L stainless steel housing and ATEX/IECEx-certified brushless EC motors, this FFU delivers 3000 CMH airflow with 99.999% H14 HEPA efficiency while withstanding explosive dust, flammable vapors, and salt spray corrosion. Its pressurized purge system and intrinsically safe circuitry ensure compliance with NFPA 496 and IEC 60079-0/11 standards, providing zero-ignition-risk air control for Zone 0/1/2 and Zone 20/21/22 areas.

Key Features

1. Robust & Fireproof Construction: Galvanized aluminum with UL.1 fireproof certification ensures durability and safety in high-risk environments.

2. Explosion-Proof Motor: BT4-rated motor paired with a 500mm aluminum alloy impeller guarantees stable airflow for hazardous areas.

3. Ultra-High Efficiency H14 Filtration: Non-partitioned HEPA filter (1170×1170×69 mm) achieves 99.999% efficiency at 0.3μm particles, exceeding ISO Class 100 standards.

4. Precision Group Control: Adjustable airflow (0.45–0.75 m/s) with synchronized group operation for large-scale cleanroom systems.

5. Energy-Optimized Performance: Wide power range (250–370W) balances high airflow demand with operational efficiency.

6. Ultra-Low Noise Operation: Maintains 45–58 dB noise levels (tested 1.5m below filter), ideal for noise-sensitive labs.

7. Vibration-Free Design: ≤5μm peak vibration ensures compatibility with precision instrumentation.

Application Scenarios

Pharmaceutical cleanrooms requiring ISO Class 100 (H14) particulate control for sterile manufacturing.

Electronics manufacturing with stringent airflow uniformity and explosion-proof requirements.

Biotechnology facilities demanding group-controlled airflow, ultra-low noise, and fireproof safety.

FAQ :
1,Q: How does the pressurized purge system prevent explosive gas ingress in Zone 0 areas?
A: The system maintains +25Pa constant overpressure inside the FFU using inert gas (N2), blocking external flammable gases. Combined with leakage rate <0.05%, it exceeds IEC 60079-2 requirements for Category 1G/1D equipment.
2,Q: Can this FFU handle corrosive offshore oil rig environments?
A: Absolutely. The 316L stainless steel + PTFE coating passes:
ISO 9227 C5-M corrosion resistance (2000hr salt spray)
NACE MR0175 compliance for H2S-rich oil/gas fields
-40°C to +120°C operational range for Arctic/desert extremes
3,Q: Why is dual ATEX/IECEx certification critical for global projects?
A: Dual certification ensures:
EU compliance (ATEX Directive 2014/34/EU) for European refineries
International acceptance (IECEx) for Middle East/APAC markets
Simplified approvals with unified Ex ia IIC T4/T135°C ratings