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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 Explosion-Proof Split Wall-Mounted AC Passes IEC 60335-2-40:2022 Test Report and Achieves Australian SAA Certification, Expanding Its Compliance FootprintWe are pleased to announce that the CNWINNEX explosion-proof split wall-mounted air conditioner has successfully passed the TEST REPORT IEC 60335-2-40 after a 10-week operation testing period, and has concurrently obtained Australian SAA certification. With these milestones, CNWINNEX explosion-proof air conditioners now close the loop across three compliance dimensions—hazardous-area explosion protection, electrical safety, and Australian market access—meeting ATEX Directive 2014/34/EU and related compliance standards, and providing customers on global hazardous-area projects with a more definitive compliance foundation.
CNWINNEX BKT-26 Mobile Packaged Explosion-Proof Air Conditioner: 25kW Plug-and-Play Cooling for Temporary and Mobile Hazardous Work ZonesThermal control requirements in hazardous areas are not always fixed. Plant turnarounds, emergency repairs, confined-space operations, temporary hazardous-material storage, and temporary explosion-proof electrical rooms share a common profile: the work location moves, the deployment window is short, and explosion-proof compliance does not relax because the job is "temporary." Conventional fixed explosion-proof air conditioners struggle in these scenarios—long installation cycles, complex piping modifications, and equipment that cannot follow the work face. The CNWINNEX BKT-26 Mobile Packaged Explosion-Proof Air Conditioner is engineered to fill this gap: 25kW cooling capacity in a fully integrated monoblock, heavy-duty swivel casters with brakes, and dual lifting provisions (top lifting eyes and bottom forklift pockets) that let an Ex db ib mb IIC T4 Gb certified unit be moved, positioned, and commissioned as work demands shift.
CNWINNEX Rooftop Packaged Explosion-Proof Air Conditioner: 200kW All-in-One Thermal Control That Rethinks Installation for Marine & Offshore Hazardous AreasLarge-capacity climate control in hazardous areas has long carried a structural contradiction. Split explosion-proof systems distribute the compliance burden across indoor units, outdoor units, refrigerant piping, and on-site coordination—each interface a potential gap in the certification chain and a drag on project schedules. Conventional floor-standing or cabinet units, meanwhile, consume premium work area in spaces where every square meter already carries operational and safety value. The CNWINNEX Rooftop Packaged Explosion-Proof Air Conditioner resolves this by moving integration upstream: cooling, heating, humidification, steam heating, and the complete explosion-proof electrical control system are assembled and factory-tested in a single rooftop monoblock. On site, only power, water, and duct connections remain. With 200kW rated cooling and heating capacity and 36,000 m³/h airflow, it delivers centralized, uniform thermal control within an ATEX Zone 1/2 compliance envelope.
CNWINNEX Explosion-Proof Split Wall-Mounted Air Conditioner: Wide-Temperature Cooling from -7℃ to 55℃ for ATEX Zone 1 & 2 Hazardous SitesIn oil and gas stations, chemical plants, and high-temperature work zones on offshore platforms, the question is not whether an air conditioner can cool—it is whether it can keep cooling when the ambient temperature pushes past 55℃, while simultaneously meeting the non-negotiable compliance requirements of Zone 1 and Zone 2 hazardous areas. Safety and performance are not a trade-off. They are the baseline.
The CNWINNEX split wall-mounted high-temperature explosion-proof air conditioner is engineered for exactly this intersection. It delivers stable cooling across a -7℃ to 55℃ ambient range, operating reliably through both extreme heat and sub-zero cold. With explosion protection marking Ex db mb IIC T4 Gb, it is suitable for Zone 1 and Zone 2 explosive gas atmospheres and designed in strict compliance with ATEX Directive 2014/34/EU.
CNWINNEX Engineering Explosion-Proof AC Systems for 50°C OperationDesigning cooling equipment for 50°C ambient conditions compounds the challenges of explosion protection. Heat rejection becomes progressively more difficult as the temperature differential between the condenser and surrounding air shrinks. A unit rated for 35°C ambient may lose 30% or more of its cooling capacity at 50°C—assuming it continues operating at all. Material selection determines whether components survive sustained thermal stress: seals that remain flexible at moderate temperatures can harden and crack at 50°C, compromising both explosion protection and refrigerant containment; lubricants thin under heat, accelerating bearing wear; electronic control boards experience accelerated aging when junction temperatures climb.
CNWINNEX Explosion-Proof Screw Air-Cooled Chiller (Heat Pump) | Explosion-Proof Chiller for Petrochemical & Chemical IndustriesThe CNWINNEX explosion-proof screw air-cooled chiller (heat pump) is designed and manufactured in strict compliance with the EN 60079 series explosion protection standards and conforms to ATEX Directive 2014/34/EU, featuring reliable quality and superior explosion-proof performance. The unit is mainly suitable for the petroleum, chemical, electric power, military and pharmaceutical industries, and is applied in hazardous areas of Zone 1 and Zone 2 where explosive atmospheres formed by flammable gases or vapours of Group ⅡA, ⅡB, ⅡC and temperature classes T1~T4 mixed with air may exist. Explosion-proof marking: Ex db mb IIC T4 Gb, suitable for Zone 1 and Zone 2 explosive hazardous areas. With advanced twin screw compression technology, intelligent control system and reliable explosion-proof design, the unit provides efficient, stable and energy-saving chilled (or hot) water supply for high-hazard industrial sites.
CNWINNEX Explosion-Proof Compressor: Static Pressurization + Multi-Layer Intrinsic Safety, an IECEx-Certified “Compliant Heart”
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.
Structural Anatomy: How an Explosion-Proof Compressor Confines Ignition Sources Behind Multiple Lines of Defense
The explosion-proof logic of this compressor can be broken down layer by layer:
Static positive-pressure compressor body. The compressor adopts the static pressurization protection concept, maintaining a protective gas at positive pressure inside the enclosure to prevent external explosive gases from entering the equipment at the source. The compressor body achieves IP66 ingress protection, maintaining enclosure integrity under dust, moisture, and washdown exposure.
Increased-safety junction box. The junction box uses increased-safety (“e”) protection, also rated IP66. Terminals are arranged inside the box; the compressor windings and crankshaft are located within the compressor, and the temperature sensor is placed inside the compressor through the terminals in the junction box—electrical connections and the temperature-sensing path are completed within the increased-safety framework, reducing the probability of sparks or hazardous temperatures under normal operation.
Intrinsically safe sensing and protection components. The compressor is equipped with two low-pressure protection devices, one high-pressure protection device, and one temperature sensor, all intrinsically safe simple components powered by safety barriers located in the safe area, with corresponding intrinsic safety parameters specified in the certificate schedule. This means the energy in the sensing and protection circuits is restricted below the threshold capable of igniting an explosive atmosphere—incapable of ignition even under fault conditions. The low-pressure and high-pressure protection devices are connected in parallel with the compressor via pipelines, ensuring the pressure they sense remains consistent with the pressure inside the compressor, so protection does not lag due to pressure-tapping path deviations.
Certified solenoid valve. The solenoid valve adjusts cooling capacity and is controlled by a certified electromagnetic coil. Four-cylinder compressors can adjust cooling capacity to 100%, 75%, and 50%, while two-cylinder compressors can adjust to 100% and 50%. In hazardous-area applications with fluctuating loads, staged capacity control reduces the impact of frequent start-stop cycles on the compressor and better matches cooling output to actual thermal load.
Differentiated ingress protection ratings. In accordance with IEC 60529, the Ex “p” compressor enclosure and Ex “e” junction box are rated IP66; the Ex “i” low-pressure controller enclosure and high-low pressure controller enclosure are rated IP30. Different ratings correspond to different installation locations and environmental exposure—a rational balance between explosion-proof integrity and engineering economy, rather than simple parameter stacking.
Standards Matrix: A Certificate Backed by Five IEC 60079 Standards
The compressor’s IECEx certificate covers:
- IEC 60079-0:2017 — General requirements for equipment in explosive atmospheres;
- IEC 60079-2:2014 — Protection by pressurized enclosure “p”;
- IEC 60079-7:2017 — Protection by increased safety “e”;
- IEC 60079-11:2011 — Equipment protection by intrinsic safety “i”;
- IEC 60079-18:2017 — Protection by encapsulation “m”.
In the marking Ex eb ib mb pxb IIC T4 Gb, IIC covers the most hazardous gas groups, including hydrogen and acetylene; T4 corresponds to a maximum surface temperature not exceeding 135°C; and Gb qualifies the equipment for Zone 1 and Zone 2 explosive gas atmospheres. The stacking of four protection concepts on a single component carries a clear engineering implication: protection-layer redundancy—if a single layer degrades under sustained operation, thermal cycling, or vibration, the remaining mechanisms continue to form an effective safety barrier.
Practical Value for Complete Units and Projects
Independent traceability of core-component compliance. In hazardous-area project reviews, auditors frequently require separate traceability for critical components. The compressor’s independent IECEx certificate allows the compliance evidence chain of CNWINNEX explosion-proof air conditioners to extend from the complete unit down to the core moving component.
Capacity control matched to real loads. Staged adjustment at 100%/75%/50% (four-cylinder) and 100%/50% (two-cylinder) enables explosion-proof air conditioners to maintain reasonable efficiency and stable operation under part-load conditions, reducing start-stop frequency.
A clearly defined wide-temperature boundary. The -25°C to +60°C ambient range covers conditions from cold regions to high-temperature oil and gas stations, providing underlying support for complete-unit operation in desert, offshore, and extreme-climate applications.
Applications
As a core component, this explosion-proof compressor is integrated across CNWINNEX split wall-mounted, packaged, rooftop packaged, and mobile packaged explosion-proof air conditioner lines, serving oil and gas / petrochemical process units, chemical and hazardous-material storage, power industry explosion-proof electrical rooms, fixed-installation marine and offshore cabins, and temporary or fixed work spaces requiring Zone 1/2 thermal control.
Request Compressor IECEx Documentation and Explosion-Proof AC Selection Support To review the IECEx certificate and standards-compliance documentation for this explosion-proof compressor, or to consult on selection based on hazardous area classification, gas group, temperature class, and cooling load, please contact the CNWINNEX engineering team.
Contact Us Web: www.cnwinnex.com Email: info@cnwinnex.com WhatsApp: +86 193 5436 4613
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