In flammable and explosive environments such as petrochemical plants, coal mines, spray painting workshops, and dust workshops, ordinary fans can generate electrical sparks or mechanical friction sparks during operation that may ignite explosive mixtures, causing serious safety accidents. Explosion-proof fans ensure safe operation in hazardous environments through special design and certification.
GB 3836.1-2021: Explosive atmospheres - Part 1: Equipment for explosive atmospheres - General requirements
GB 3836.2-2021: Explosive atmospheres - Part 2: Equipment by flameproof enclosure (Ex d)
GB 3836.3-2021: Explosive atmospheres - Part 3: Equipment by increased safety (Ex e)
GB 12476-2023: Electrical equipment for combustible dust environments
Xinfeng Fan explosion-proof fans are all certified by the National Quality Supervision and Inspection Center for Explosion-Protected Electrical Products (CQST), with explosion-proof mark Ex d IIB T4 Gb / Ex tD A21 IP65 T80°C.
| Rating | Meaning | Applicable Environments |
|---|---|---|
| Ex d IIC | Can protect against hydrogen, acetylene | Chemical plants, gas stations |
| Ex d IIB | Can protect against ethylene, propane | Spray painting workshops, pharmaceutical plants |
| Ex d IIA | Can protect against gasoline, methane | Food factories, warehouses |
| Rating | Meaning | Applicable Environments |
|---|---|---|
| Ex tD A21 | IP6X dust protection, surface temperature ≤80°C | Flour mills, coal powder workshops |
| Ex tD A22 | IP6X dust protection, surface temperature ≤135°C | Plastic granule workshops |
Xinfeng Fan provides Ex d IIB T4 Gb and Ex tD A21 B20 T80°C certifications, covering 95%+ of industrial environments.
Housing made of HT250 gray cast iron or 304 stainless steel casting
Joining surface width ≥25mm, gap ≤0.15mm
Pressure test 1.5x working pressure, no deformation or leakage
YB3 series flameproof three-phase asynchronous motor
Protection grade IP55, insulation grade F
Temperature rise margin ≥15K, ensuring surface temperature does not exceed T4 group (135°C)
Impeller and housing insulation treatment, resistance value ≤10⁶Ω
Grounding terminal ≥M8, grounding resistance ≤0.1Ω
Cable entry device MT type explosion-proof sealing connector
Emergency stop button (IP66 protection)
Over-temperature protection (PT100 temperature sensor)
Vibration monitoring (amplitude ≥4.5mm shutdown)
| Environment | Explosion-Proof Rating | Xinfeng Configuration |
|---|---|---|
| Petrochemical | Ex d IIC T6 Gb | Resistant to benzene, toluene, hydrogen |
| Coal Mine Underground | Ex d I Mb | Mining intrinsic safety type, AT3 certification |
| Spray Painting Workshop | Ex tD A21 IP6X T80°C | Paint mist corrosion resistance |
| Dust Workshop | Ex tD A22 IP6X T135°C | Flour/plastic/metal dust |
| Wastewater Treatment | Ex d IIB T4 Gb | H2S corrosion resistance |
Determine explosive environment category (gas/dust)
Confirm gas/dust group and temperature group
Calculate required air volume and pressure
Select explosion-proof rating and material
Xinfeng provides explosion-proof fan technical solution
🏭 Xinfeng Fan has supplied 2,000+ explosion-proof fans to Sinopec, CNPC, Wanhua Chemical, and other enterprises with zero safety incidents.
| Parameter | Specification |
|---|---|
| Explosion-Proof Rating | Ex d IIB T4 Gb |
| Air Volume | 5,000-50,000 m³/h |
| Power | 2.2-30 kW |
| Material | Carbon steel anti-corrosion/304 stainless steel |
| Parameter | Specification |
|---|---|
| Explosion-Proof Rating | Ex d IIB T4 Gb |
| Air Volume | 3,000-30,000 m³/h |
| Power | 2.2-75 kW |
| Material | Carbon steel anti-corrosion/316L stainless steel |
| Parameter | Specification |
|---|---|
| Explosion-Proof Rating | Ex d IIB T4 Gb |
| Temperature Resistance | 280°C×30min |
| Air Volume | 5,000-50,000 m³/h |
| Material | Carbon steel + fireproof material |
| Advantage | Description |
|---|---|
| Full Product Line Explosion-Proof Certification | Certificates available |
| Flameproof Enclosure + Explosion-Proof Motor | Anti-static design |
| Safety Interlock | Emergency stop + over-temperature protection + vibration monitoring |
| Warranty | 2-year warranty, lifetime maintenance |
| Free Explosion-Proof Solution Consultation | Selected by Sinopec, CNPC, Wanhua Chemical |
Q: How much more do explosion-proof fans cost compared to ordinary fans?
A: Due to special design and certification, explosion-proof fans cost 2-3 times more than ordinary fans. However, considering safety value, the investment return ratio is extremely high.
Q: How long is the explosion-proof certification valid?
A: The explosion-proof certificate is valid long-term but requires regular inspection. Xinfeng provides annual explosion-proof performance testing services.
Q: Can explosion-proof fans be used in corrosive environments?
A: Yes, Xinfeng provides 316L stainless steel explosion-proof fans that meet both Ex d IIB T4 and corrosion-resistant requirements.
Q: What is the delivery time for Xinfeng explosion-proof fans?
A: Standard explosion-proof models 15-25 days, special certification models 30-45 days. Urgent orders can be expedited.
Guangdong Xinfeng Fan Co., Ltd.
| Item | Information |
|---|---|
| Phone | 400-XXX-XXXX |
| sales@gdxffj.com | |
| Website | www.gdxffj.com |
🛡️ Selection consultation → Solution design → Equipment supply → Installation & commissioning → Annual explosion-proof inspection
Production base: Guangdong Xinfang Co., Ltd
Address: No. 33, Chuangye Road, Deqing Industrial Park, Zhaoqing, Guangdong, China
Office address: Building 5, No. 10, Yongfeng Road, Yongshan village, Shiqi Town, Panyu District, Guangzhou, Guangdong, China
TEL: 0086-400-088-0118 EMAIL: wudi@xinfeng198.com
