WEG W22X Explosion-Proof & Flameproof Induction Motors
The WEG W22X Explosion-Proof Motor Series (featured model: W22Xdb 225S/M 37 kW 4-Pole) is engineered to deliver uncompromised safety and maximum operational reliability in explosive atmospheres containing flammable gases, vapors, or combustible dusts. Designed with a heavy-duty FC-200 cast iron flameproof enclosure, precision-machined flame paths, and robust terminal boxes, the W22X series safely confines any internal explosion, preventing the ignition of surrounding hazardous atmospheres. Certified under global explosion protection standardsāincluding ATEX, IECEx, UL, CSA, and Inmetroāthe W22X line covers power ratings from 0.12 kW up to 1000 kW in IEC frame sizes 71 to 500. Featuring high-efficiency IE2/IE3 ratings, Class H WISEĀ® insulation with VFD Corona Shielding for variable frequency inverter operation, and IP55/IP66 protection, W22X motors are the preferred choice for refineries, offshore oil platforms, chemical processing plants, grain silos, and gas compressor stations.
Technical Specifications
| Featured Model | W22Xdb 225S/M (37 kW / 50 HP, 4-Pole, 400V/690V, IEC 225 Frame, Ex db IIB/IIC T4) |
|---|---|
| Brand / Manufacturer | WEG |
| Product Series | WEG W22X & W22Xdb Flameproof / Explosion-Proof Series |
| Power Range Covered | 0.12 kW to 1000 kW (0.16 HP to 1350 HP) |
| Explosion Protection Class | Ex d / Ex db (Gas Group IIB / IIC), Ex tb / Ex tc (Dust Group IIIC), Temp Class T4 / T5 / T6 |
| Hazardous Area Classification | Zone 1 & Zone 2 (Gas Atmospheres); Zone 21 & Zone 22 (Combustible Dust) |
| Certifications & Compliance | ATEX, IECEx, UL (Class I Div 1 / Div 2), CSA, INMETRO, TR CU (EAC Ex) |
| Frame Sizes (IEC) | 71 to 500 (Heavy-Duty FC-200 Cast Iron Enclosure with Flameproof Joints) |
| Insulation & Protection | Class F / H Insulation with WEG WISEĀ® VFD Shielding; IP55 / IP56 / IP65 / IP66 |
Documentation & Resources
WEG W22X Power, Flameproof Marking & Frame Size Selection Matrix
Selection matrix for standard WEG 2-pole, 4-pole, and 6-pole explosion-proof induction motors for hazardous gas and dust environments (50 Hz / 60 Hz Direct-on-Line or VFD operation):
| Motor Power (kW / HP) | Poles / Speed | IEC Frame Size | Protection Marking | Typical WEG Model Code |
|---|---|---|---|---|
| 4.0 kW (5.5 HP) | 4-Pole (1500 RPM) | 112M | Ex db IIB T4 Gb / IP55 | W22Xdb 112M 4kW 4P Exd |
| 7.5 kW (10 HP) | 4-Pole (1500 RPM) | 132M | Ex db IIB/IIC T4 Gb / IP55 | W22Xdb 132M 7.5kW 4P Exd |
| 15 kW (20 HP) | 4-Pole (1500 RPM) | 160L | Ex db IIC T4 Gb / IP66 | W22Xdb 160L 15kW 4P Exd |
| 30 kW (40 HP) | 4-Pole (1500 RPM) | 200L | Ex db IIC T4 Gb / IP66 | W22Xdb 200L 30kW 4P Exd |
| 55 kW (75 HP) | 4-Pole (1500 RPM) | 250S/M | Ex db IIC T4 Gb / VFD Duty | W22Xdb 250S/M 55kW 4P Exd |
| 110 kW (150 HP) | 4-Pole (1500 RPM) | 315S/M | Ex db IIC T4 Gb / VFD Duty | W22Xdb 315S/M 110kW 4P Exd |
| 250 kW (335 HP) | 4-Pole (1500 RPM) | 355L/U | Ex db IIC T4 Gb / High Volt | W22Xdb 355L/U 250kW 4P Exd |
Hazardous Area Motor Modernization & Safety Retrofit Guide
Upgrade legacy non-certified drives or outdated Ex d motors to modern, high-efficiency WEG W22X explosion-proof motors with global certifications:
| Legacy Hazardous Area Motor Design | WEG W22X Explosion-Proof Upgrade | Key Safety & Operational Advantages |
|---|---|---|
| Legacy Non-IE Certified Ex d Motors | WEG W22X IE3 Premium Efficiency Flameproof Energy Saving & Cool Run | Lower operating temperature rise reduces thermal stress on winding insulation and minimizes ignition risks. |
| Standard Non-VFD Certified Ex Motors | WEG W22X VFD Inverter-Duty Certified Motors VFD Safe in Zone 1 | Certified for variable speed control with PTC/PT100 thermistor protection without invalidating Ex safety ratings. |
| Corrosive Offshore & Chemical Drives | WEG W22X Severe Duty Stainless/Epoxy Treated IP66 Corrosion Resistant | Epoxy painted FC-200 cast iron frame with stainless steel fasteners and VITON seals withstands saltwater and H2S gas environments. |
Expert Sourcing & Hazardous Area Application Engineering Notes
WEG W22X motors feature precision-machined flamepaths, labyrinth shaft seals, reinforced flameproof terminal boxes, and non-sparking external fans to ensure complete containment of any electrical arc or internal ignition. Equipped with WEG WISEĀ® insulation system, high-grade re-greasable bearings, insulated bearings for VFD operation above 280 frame, and integrated thermistors (PTC/PT100) in windings and bearing housings, these units deliver maximum plant safety and long service life. Our engineering team assists with ATEX/IECEx certificate verification, ambient temperature rating customization (-55Ā°C to +60Ā°C), and VFD drive parameter tuning for Zone 1 and Zone 2 applications.
Core Benchmark Model Standard Configurations
- W22Xdb 112M 4kW 4P Exd
- W22Xdb 132M 7.5kW 4P Exd
- W22Xdb 160L 15kW 4P Exd
- W22Xdb 180L 22kW 4P Exd
- W22Xdb 200L 30kW 4P Exd
- W22Xdb 225S/M 37kW 4P Exd
- W22Xdb 250S/M 55kW 4P Exd
- W22Xdb 315S/M 110kW 4P Exd
- WEG W22X ATEX IECEx Zone 1
- WEG W22X Gas Group IIC T4
- WEG W22X Dust Group IIIC IP66
- WEG W22X VFD Inverter Certified
