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.
Parameter Name | Value |
Material | High-quality galvanized aluminum (UL.1 fireproof grade) |
Fan System | BT4 explosion-proof motor + 500mm aluminum alloy impeller |
Filtration | Aluminum frame non-partition HEPA filter (1170×1170×69 mm),
Efficiency: 99.999% @0.3μm (H14), Initial resistance: ≤110Pa ±10% |
Air Speed | 0.45–0.75 m/s ±5% (group control) |
Noise Level | 45–58 dB ±5dB (static test 1.5m below filter) |
Power Supply | 220V, 50Hz |
size | 1175×1175×380 mm |
Air Volume | 2000 CMH |
Certifications | ISO 14644-1,ISO 9001,CE |
| Parameter/Feature | Our Product | Market Average | Advantages |
|---|
| H13 Filter Pleat Count | 315 pleats | 260 pleats | Larger filtration area, improving filtration efficiency and dust
holding capacity. |
| HEPA Filter | - | - | Increased thickness of filtration media enhances filtration
effectiveness and lifespan. |
| Pleat Height | 50 mm | 38 mm | Thicker filtration media improves filtration performance and
longevity. |
| Protective Mesh Brand | High-quality 9N brand | Generic brands | Superior support and protection, ensuring structural stability. |
| Frame Thickness | 1.0 mm | 0.7 mm | Stronger frame for enhanced durability and reduced deformation
risks. |
| Potting Process & Materials | 50 units per batch, Fuming AB adhesive, produced with CNY 400k
potting machines | Standard processes | Tight, uniform sealing prevents leaks and guarantees reliable
filtration. |
| Average Airflow Velocity | 0.8 m/s | 0.65 m/s | Higher airflow capacity with lower resistance, boosting system
efficiency. |
| Motor | Waterproof | Non-waterproof | Enhanced safety and reliability in diverse environments. |
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
