Industrial Explosion-proof Centrifugal Fan

In the production workshops of chemical plants, the paint mixing rooms of coating factories, and the gas stations of oil depots, the air may contain flammable and explosive gases or dust such as organic solvents, oil vapors, and coal dust. Once the concentration reaches the explosive limit, any spark - including static electricity generated by fan operation, sparks from motor faults, or friction sparks between impeller and casing - can trigger a devastating explosion. Our factory's Industrial explosion-proof centrifugal fan is specifically designed for ventilation in flammable and explosive environments, with explosion-proof motors, anti-static impellers, and spark-proof structures, ensuring safe operation in hazardous locations - essential safety equipment for chemical, petroleum, coating, and other industries.

The explosion-proof performance of the Industrial explosion-proof centrifugal fan is reflected in every detail. The motor is a dedicated explosion-proof motor with explosion-proof enclosure (Ex d) or increased safety (Ex e) type, certified to national explosion-proof standards, capable of containing internal explosions without propagating to the external environment, and with surface temperature controlled below the ignition temperature of the surrounding medium. The impeller is usually made of aluminum alloy or stainless steel to avoid spark generation from collision with the casing; for higher requirements, the impeller and casing inner surface can be treated with anti-static coating or copper inlay to prevent static electricity accumulation and friction sparks. The casing is manufactured from thickened steel plate with robust structure and tight joints, preventing gas leakage. All electrical components (junction boxes, cables, switches) are explosion-proof type, with cable entries sealed with explosion-proof glands. The fan is equipped with grounding terminals to ensure reliable grounding and eliminate static electricity. Our factory's Industrial explosion-proof centrifugal fan strictly follows national explosion-proof standards (GB 3836) in design and manufacturing, with each unit undergoing explosion-proof performance inspection and no-load running testing before shipping, ensuring safe and reliable operation in flammable and explosive environments. In the solvent recovery workshop of a large coating factory, air contains high concentrations of toluene and xylene vapors, classified as Zone 1 hazardous location. An explosion-proof centrifugal fan with Ex d IIB T4 rating is installed to extract solvent-laden air and send it to the recovery system. Its explosion-proof motor can contain internal arcs without external propagation; its aluminum alloy impeller avoids friction sparks; its anti-static treatment prevents static accumulation - ensuring safe operation 24/7 in high-concentration solvent vapor environments, protecting the lives of workshop personnel and the safety of factory property - this is the core value of Industrial explosion-proof centrifugal fans in hazardous location ventilation.

• Ventilation and exhaust in chemical plant production workshops and storage areas
• Paint mixing rooms, spraying workshops, and solvent recovery systems in coating factories
• Ventilation in oil depots, gas stations, and petroleum product storage areas
• Ventilation in coal preparation plants, coal silos, and coal conveying systems
• Ventilation in pharmaceutical factories' solvent workshops and chemical reagent warehouses
• Ventilation in printing plants' ink workshops and dry cleaning shops

Our factory has 25 years focused on industrial fan manufacturing, with explosion-proof fans as a key safety product line. The factory covers over 10,000 square meters with over 100 employees, possessing professional explosion-proof fan manufacturing capabilities and quality management systems, equipped with dynamic balancing machines, CNC laser cutting machines, and explosion-proof electrical testing equipment, with monthly production capacity of 5 million RMB. Our explosion-proof fans strictly follow national explosion-proof standards in design and manufacturing, with products widely applied in chemical, petroleum, coating, and other industries, recognized by customers for safety and reliability.

Explosion-proof centrifugal fans can be customized based on customer hazardous location classification and medium parameters. Explosion-proof rating selectable as Ex d IIB T4, Ex e IIB T4, or Ex tD A21 IP65 based on gas/dust type and zone. Motor brand and explosion-proof grade can be specified. Impeller material selectable as aluminum alloy or stainless steel; anti-static coating or copper inlay available for higher requirements. Casing material selectable as carbon steel or stainless steel. Inlet/outlet flange dimensions machined to customer ducts. Variable-frequency speed control with explosion-proof VFD available. MOQ is one unit; customization lead time is 10–15 working days.

The quality of explosion-proof fans directly relates to safety, so we enforce extremely strict manufacturing inspection. Explosion-proof motors are verified against explosion-proof certificates and nameplate parameters before warehousing. Impellers are inspected for material (aluminum alloy or stainless steel) and anti-static treatment. Welding is performed by certified welders, with casing welds undergoing kerosene leakage testing. Each impeller is dynamically balanced after assembly with accuracy no lower than Grade G6.3. Electrical connections are inspected for explosion-proof sealing and grounding reliability. After assembly, no-load running verifies current, vibration, noise, and motor surface temperature. Every product undergoes 100% inspection, accompanied by explosion-proof certificate copies and inspection records.

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