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CNWINNEX BT35-11-11.2 Explosion-Proof Stainless Steel Axial Fan: 67,892 m³/h High-Volume Airflow for Centralized Ventilation Power in Large Hazardous SpacesIn large refinery process areas, hazardous-material storage warehouses, and onshore terminals of offshore platforms, the central contradiction in ventilation systems is often not whether explosion-proof certification exists, but whether sufficient air volume can be moved through the hazardous area per unit of time. When spatial scale rises to thousands of square meters, ceiling heights exceed ten meters, or duct routes cross multiple fire compartments, the air-change rate that conventional small and medium fan sizes achieve only through multiple parallel units can be delivered by a single high-volume unit—reducing installation nodes, and with them, the explosion-proof interfaces and maintenance touchpoints at every node.
CNWINNEX BT35-11-6.3 Explosion-Proof Stainless Steel Axial Fan: 18,250 m³/h Medium-High Airflow for Reliable Ventilation Boundaries in Corrosive Hazardous WorkshopsIn the routine ventilation design of chemical workshops, hazardous-material warehouses, and oil and gas stations, equipment selection often faces an implicit contradiction: explosion-proof compliance answers whether a fan can be used at all, but the corrosion degradation of impellers and casings in carbon steel or aluminum alloy units under humid, mildly corrosive, or sulfur-bearing atmospheres steadily erodes the boundary of how long it remains usable. A fan that runs safely in a Zone 1 area for three years may still require premature replacement because pitting on the blades throws off dynamic balance and reduces airflow—a problem that explosion-proof certification alone does not address, but that material and process engineering must answer.
The CNWINNEX BT35-11-6.3 Explosion-Proof Stainless Steel Axial Fan is designed for precisely this contradiction: stainless steel casing and impeller confront corrosive gases and humid environments, ATEX Directive 2014/34/EU and EN 60079 series
CNWINNEX BT35-11-3.15 Explosion-Proof Stainless Steel Axial Fan: ATEX-Compliant High-Efficiency, Low-Noise VentilationIn the explosive hazardous areas of petrochemical plants, oil and gas stations, hazardous-material storage facilities, and offshore platforms, ventilation equipment is not merely a process accessory—it is a foundational line of defense for the working environment. Conventional fans often struggle to reconcile material durability with explosion-proof reliability when faced with high salt spray, corrosive gases, and explosive atmospheres. The CNWINNEX BT35-11-3.15 Explosion-Proof Stainless Steel Axial Fan is engineered precisely for the ventilation demands of Zone 1 and Zone 2 high-risk environments. The product addresses corrosion challenges through stainless steel construction, establishes its explosion-proof baseline on ATEX and EN 60079 series standards, and balances 3,076 m³/h airflow with low-noise operation within a compact frame.
CNWINNEX Explosion-Proof Compressor: Full Coverage of 9 Refrigerants and Precise Pressure Control for Uncompromised Safety BoundariesIn hazardous-area explosion-proof refrigeration systems, refrigerant selection is often dictated by a project's regional environmental regulations, thermal control requirements, and system design. As the "heart" of the system, a compressor's ability to be compatible with multiple refrigerants while maintaining absolute safety control under various pressure conditions is a key indicator of engineering maturity in explosion-proof equipment.
CNWINNEX EX-ART2 2-Cylinder Explosion-Proof Compressor: Compact Architecture and Robust Parameters for Precise Cooling in Confined Hazardous SpacesIn offshore platform analyzer rooms, small explosion-proof control cabins, or space-constrained electrical equipment rooms, explosion-proof HVAC equipment faces strict physical size limits and exceptionally high safety compliance requirements. As China’s only independently IECEx-certified explosion-proof compressor company, CNWINNEX’s affiliated company introduces the EX-ART2 series 2-cylinder explosion-proof compressors—engineered specifically for these "space-premium and high-risk" working conditions.
Centered on static positive-pressure protection (pxb) and integrated with an increased-safety junction box and intrinsically safe protection components, the series carries the marking Ex eb ib mb pxb IIC T4 Gb. Through a compact 2-cylinder structure and two size matrices, it provides a solid, compliant refrigeration heart for cooling capacity requirements ranging from 3.39kW to 11.2kW.- CNWINNEX EX-ART4 Explosion-Proof Compressor: A Modular Matrix and Wide-Voltage Range Customized for Global Hazardous-Area Thermal ControlIn hazardous-area thermal control systems, a compressor must not only deliver sufficient cooling capacity but also guarantee absolute explosion-proof reliability. As China’s only independently IECEx-certified explosion-proof compressor company, CNWINNEX’s affiliated company introduces the EX-ART4 series 4-cylinder explosion-proof compressors. Centered on static positive-pressure protection (pxb) and integrated with increased safety (eb), intrinsic safety (ib), and encapsulation (mb), this series provides a rock-solid safety foundation alongside a highly modular model design and broad electrical parameter matrix—delivering a precisely matched, highly robust core for global explosion-proof HVAC systems.
- CNWINNEX Explosion-Proof Compressor: Static Pressurization + Multi-Layer Intrinsic Safety, an IECEx-Certified “Compliant Heart”The safety of an explosion-proof air conditioner is never determined by the enclosure alone. As the core moving component of the refrigeration cycle, the compressor is both the center of energy conversion and one of the potential ignition sources that most requires systematic control in hazardous areas. CNWINNEX’s affiliated company is China’s only explosion-proof compressor company holding an independent IECEx certificate. The compressor uses static positive-pressure protection as its primary structure, combined with an increased-safety junction box, intrinsically safe sensing and protection components, and a certified solenoid valve—forming a clearly layered, independently traceable explosion-proof system. Marking: Ex eb ib mb pxb IIC T4 Gb; ambient temperature range: -25°C ≤ Tamb ≤ +60°C.
- CNWINNEX’s affiliated company is China’s only independently IECEx-certified explosion-proof compressor manufacturer. Certifed to IEC 60079-0/-2/-7/-11/-18, marking Ex eb ib mb pxb IIC T4 Gb, -25°C to +60°C. The compliant core inside CNWINNEX explosion-proof air conditioners.The compliance of an explosion-proof air conditioner begins with its most critical component. CNWINNEX’s affiliated company is China’s only explosion-proof compressor company holding an independent IECEx certificate—a qualification whose significance lies not in the document itself, but in the fact that it places the most critical moving part of an explosion-proof air conditioner within an independent, traceable, and verifiable international compliance framework. In oil and gas, chemical, offshore, and hazardous-material storage applications, the compressor is both the heart of the refrigeration cycle and a potential ignition source. The depth of a compressor’s explosion-proof compliance directly determines the safety margin and certification credibility of the complete unit in Zone 1 and Zone 2 hazardous areas.
CNWINNEX BT35-11-11.2 Explosion-Proof Stainless Steel Axial Fan: 67,892 m³/h High-Volume Airflow for Centralized Ventilation Power in Large Hazardous Spaces
In large refinery process areas, hazardous-material storage warehouses, and onshore terminals of offshore platforms, the central contradiction in ventilation systems is often not whether explosion-proof certification exists, but whether sufficient air volume can be moved through the hazardous area per unit of time. When spatial scale rises to thousands of square meters, ceiling heights exceed ten meters, or duct routes cross multiple fire compartments, the air-change rate that conventional small and medium fan sizes achieve only through multiple parallel units can be delivered by a single high-volume unit—reducing installation nodes, and with them, the explosion-proof interfaces and maintenance touchpoints at every node.
The CNWINNEX BT35-11-11.2 Explosion-Proof Stainless Steel Axial Fan is the largest blade-diameter specification in the BT35-11 series. At a 1,120mm blade diameter and 960 r/min speed, it delivers 67,892 m³/h airflow at 415 Pa total pressure with an 11kW power rating. Marking: Ex db ib mb IIC T4 Gb, suitable for Zone 1 / Zone 2 explosive gas atmospheres, with stainless steel construction confronting corrosive industrial atmospheres.
Core Advantages
The engineering significance of 67,892 m³/h for large-space air-change efficiency. Consider a chemical workshop of 2,000 m² with an 8 m ceiling—approximately 16,000 m³ of space volume. If the process requires 4 air changes per hour, the required airflow is roughly 64,000 m³/h. The single-unit airflow of the BT35-11-11.2 leaves margin above this baseline, meaning that in most large workshops, a single-unit or two-unit configuration satisfies the air-change requirement, avoiding the airflow-organisation disruption and installation-density issues associated with multiple smaller fans. The 415 Pa total pressure provides the necessary static-pressure reserve for medium-length duct systems, leaving adjustment room when duct routing changes.
The efficiency combination of 960 RPM low speed and large-diameter blades. A structural advantage of large fan sizes is that, at the same or greater airflow, the 960 r/min speed is far lower than the 1,450 or 2,900 r/min of smaller sizes. Lower speed directly reduces blade tip speed, airflow noise, and bearing wear. For ventilation systems in large hazardous spaces that must run continuously, lower speed translates into longer maintenance intervals and smoother operating behaviour.
The coverage breadth of IIC T4 Gb in large industrial settings. The variety of gas media potentially present in large refining and chemical units is far more complex than in small workshops. The IIC rating covers hydrogen and acetylene, T4 limits surface temperature to 135°C, and Gb protection level qualifies the fan for Zone 1 and Zone 2. This combination allows a single fan to adapt to the ventilation requirements of multiple release scenarios within a process area, reducing equipment-model fragmentation caused by gas-group differences.
Stainless steel construction as support for long-term continuous operation. The replacement cost of a large ventilation unit includes not only the equipment itself but also downtime, dismantling, reinstallation, and explosion-proof system re-verification. The BT35-11-11.2 uses stainless steel casing and impeller (304 / 316L optional) to slow corrosion in sulfur-bearing atmospheres, coastal salt spray, or humid process environments, maintaining blade aerodynamic efficiency and reducing the probability of unplanned downtime across the lifecycle.
Dimensions and installation considerations. At 1,210 × 830 mm, installation on the external wall or roof of a large hazardous space requires corresponding structural openings and load-bearing supports. It is recommended to confirm the structural load at the installation surface and the hazardous-area boundary demarcation during the selection stage.
Technical Specifications
Model BT35-11-11.2
Brand CNWINNEX
Blade diameter 1,120 mm
Speed 960 r/min
Airflow volume 67,892 m³/h
Total pressure 415 Pa
Power 11 kW
Power supply 380V / 3Ph / 50Hz (customizable)
Dimensions 1,210 × 830 mm
Material Stainless steel (304 / 316L optional)
Explosion-proof marking Ex db ib mb IIC T4 Gb
Applicable zones Zone 1 / Zone 2
Compliance ATEX Directive 2014/34/EU; EN 60079 series
Typical Applications
l Large refinery process areas and chemical workshops. General ventilation and emergency exhaust for process buildings, reaction workshops, or solvent storage areas at the multi-thousand-square-meter scale. High-volume single-unit configurations reduce installation nodes and duct-network complexity.
l Large hazardous-material storage warehouses. High-ceiling, high-volume chemical warehouses and liquid tank farm pump rooms. The 67,892 m³/h airflow supports effective air-change rates for large spaces.
l Onshore terminals of offshore platforms and coastal chemical plants. Stainless steel construction adapts to salt spray and high humidity, and the IIC rating covers complex gas media potentially involved in offshore oil and gas operations.
l Large power and new energy equipment rooms. High-capacity ventilation and heat dissipation for explosion-proof electrical equipment rooms, battery rooms, or energy storage cabins. Low-speed operation reduces noise and maintenance burden under continuous duty.
Request BT35-11-11.2 Selection Support
Please provide space volume and air-change requirements, hazardous-area boundaries, gas group, duct-system resistance calculations, and installation-surface structural conditions. The CNWINNEX engineering team will return an ATEX-compliant high-volume ventilation configuration.
Contact Us
Web: www.cnwinnex.com Email: info@cnwinnex.com WhatsApp: +86 193 5436 4613
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