In flammable and explosive environments such as petroleum, chemical, military, pharmaceutical, and warehousing industries, many high-performance precision instruments, electrical control devices, and VFD cabinets are not inherently explosion-proof, yet they must operate reliably within hazardous areas. How to resolve this contradiction?
CNWINNEX Explosion-Proof Pressurized Equipment Cabin is specifically designed to "make non-explosion-proof equipment safe for hazardous areas." We provide one-to-one customized pressurized enclosures based on your specific equipment dimensions, interfaces, cooling requirements, and operational needs. By placing your standard equipment inside our enclosure, advanced pressurization technology ensures the entire unit meets the requirements for hazardous area operation—preserving the original equipment's full performance while adding reliable explosion-proof p
Explosion-Proof Pressurized Equipment Cabin-Safely Adapting Non-Ex Equipment for Hazardous Areas
In flammable and explosive environments such as petroleum, chemical, military, pharmaceutical, and warehousing industries, many high-performance precision instruments, electrical control devices, and VFD cabinets are not inherently explosion-proof, yet they must operate reliably within hazardous areas. How to resolve this contradiction?
CNWINNEX Explosion-Proof Pressurized Equipment Cabin is specifically designed to "make non-explosion-proof equipment safe for hazardous areas." We provide one-to-one customized pressurized enclosures based on your specific equipment dimensions, interfaces, cooling requirements, and operational needs. By placing your standard equipment inside our enclosure, advanced pressurization technology ensures the entire unit meets the requirements for hazardous area operation—preserving the original equipment's full performance while adding reliable explosion-proof protection.
● One-to-One Custom Design, Perfectly Matched to Your Equipment
We understand that every piece of equipment has unique requirements. The CNWINNEX engineering team provides comprehensive custom design based on your equipment drawings, dimensions, weight, electrical interfaces, cooling needs, and operating habits. Whether it's a small analyzer or a large VFD cabinet, we create a perfectly fitted "safety shell."
● Pressurized Technology, Giving Non-Ex Equipment an Explosion-Proof Identity
Strictly compliant with ATEX and IECEx standards (Ex p/px, py). By continuously introducing protective gas (such as clean air or nitrogen) into the enclosure, a stable positive pressure is maintained, effectively preventing the ingress of an external explosive atmosphere. The system features automatic compensation, purge cycles, real-time pressure monitoring, and alarm interlocks, ensuring equipment inside operates safely under all conditions.
● Operational Convenience Without Compromising Performance
Based on daily operational requirements, we can customize observation windows, panel openings, and button interfaces, allowing personnel to read parameters and operate equipment without opening the enclosure door. Ventilation and cooling requirements are fully considered to ensure explosion-proof protection does not affect original equipment performance.
● Robust Protection, Suitable for Harsh Environments
The enclosure features high-strength steel construction with anti-corrosion coatings and an IP65 rating, capable of withstanding dust, sand, rain, snow, solar radiation, and extreme temperatures. Whether in scorching desert oil fields or humid coastal chemical plants, it provides stable and reliable protection for precision equipment inside.
● Intelligent Monitoring, Unattended Operation
Integrated with an advanced control system, it displays real-time key parameters such as internal pressure and temperature. Supports remote alarm transmission and DCS integration, enabling "unattended, remote monitoring" while significantly reducing manual inspection risks.
Technical Specifications & Application Scope
● Hazardous Area Classification: Suitable for Zone 1 and Zone 2 with IIA, IIB, IIC explosive gas atmospheres; and Zone 21 and Zone 22 with combustible dust atmospheres
● Temperature Class: T1 to T4
● Enclosure Rating: IP65 for both indoor and outdoor installation
● Target Industries: Petroleum, chemical, military, pharmaceutical, warehousing, and other flammable/explosive environments
● Applicable Equipment Types: Analytical instruments, online monitoring devices, VFD cabinets, control cabinets, distribution boxes, PLC cabinets, industrial computers, and other non-explosion-proof electrical equipment
Typical Applications
● Online Analyzer Shelters: Placing non-Ex gas analyzers and chromatographs in hazardous areas.
● VFD/Soft Starter Protection: Safely operating high-power variable frequency equipment in explosive environments.
● Temporary Work Sites: Rapid deployment of standard power distribution equipment into hazardous zones.
● Equipment Retrofit/Upgrade: Adding explosion-proof functionality to existing standard equipment.
CNWINNEX explosion-proof systems are widely deployed in oil & gas, petrochemicals, pharmaceuticals, ports & terminals, mining, power generation, offshore platforms, and other areas where flammable gases or dusts are present. Typical applications include control room climate control, hazardous area logistics and access management, video surveillance & security, pressurized analyzer shelters, robotic inspection, as well as custom explosion-proof enclosures and system integration.
An explosion-proof air conditioner is a specialized HVAC unit designed for hazardous environments where flammable gases, vapors, or combustible dusts are present (e.g., petrochemical plants, gas stations, paint booths, pharmaceutical labs).
The most critical difference from a standard air conditioner lies in “active ignition prevention.” Standard units generate tiny sparks during normal operation – such as when relays open/close, compressors start/stop, or circuits make/break. While safe in normal air, these sparks can be deadly in an explosive atmosphere.
CNWINNEX’s explosion-proof design is based on the T4 temperature class. For high-temperature regions such as the Middle East or areas with extreme summer heat, we offer custom units rated for ambient temperatures up to 60°C (140°F) , ensuring reliable operation without overload in harsh tropical climates. For cold regions, we offer custom units rated for ambient temperatures as low as -50°C (-58°F) , guaranteeing safe operation in extreme arctic conditions.
The explosion-proof rating of CNWINNEX air conditioners is:
Ex 2 G D Ex db ib mb IIB T4 Gb / Ex 2 G D Ex db ib mb IIC T4 Gb / Ex ib mb tb IIIC T130°C Db
●For Gas (G): Ex db ib mb IIC T4 Gb
Suitable for IIC gas groups (including hydrogen, acetylene, etc.), using flameproof (db), intrinsic safety (ib), and encapsulated (mb) combined protection. Temperature class T4 (max surface temperature ≤135°C), Equipment Protection Level Gb.
●For Dust (D): Ex ib mb tb IIIC T130°C Db
Suitable for IIIC conductive dusts, using intrinsic safety (ib), encapsulation (mb), and dust-tight (tb) protection. Maximum surface temperature 130°C, Equipment Protection Level Db.
CNWINNEX products comply with international explosion-proof certification standards such as ISO, CNEX, ATEX, IECEx, SAA, EAC, ensuring safe use in different countries and regions., and BV or DNV (for offshore applications) . Depending on the product type and zone classification, we offer various protection concepts including Ex d, Ex e, Ex ib, and Ex nA, with ingress protection up to IP66/IP67, ensuring safe and compliant operation in hazardous environments worldwide.
Absolutely. Explosion-proof Custom Engineering is our sixth core business. From non-standard Ex components (special material junction boxes, intrinsically safe sensors, etc.) to integrated Ex systems (skid-mounted control rooms, pressurized cabins, legacy equipment retrofitting), we provide full-process custom services covering conceptual design, 3D simulation, compliance certification, manufacturing, and delivery. Simply share your operating parameters and functional needs, and we will engineer a dedicated explosion-proof safety solution for you.
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