Winnex Air Explosion-Proof HVAC Unit for Pressurised Room

Product Overview

Within high-risk industries including petroleum, petrochemical processing and biopharmaceuticals, Zone 1 and Zone 2 hazardous gas classified areas require explosion-protected pressurized enclosures, commonly known as analyzer shelters. These enclosures act as safety containment spaces for instrument control rooms, on-site analytical laboratories and metering rooms. Stable internal pressurization, paired with precise temperature and humidity regulation, is essential to protect on-site personnel, precision analytical instruments and automation control systems.

Winnex Air explosion-proof HVAC unit dedicated for pressurized enclosures is a packaged unit. It delivers stable, certified explosion protection performance with compact footprint and neat appearance. Enclosure material options include SS304, SS316L stainless steel or powder-coated carbon steel, capable of resisting corrosive agents, high humidity and salt spray in harsh site conditions.

The unit integrates cooling, heating, dehumidification, ventilation and enclosure pressurization in one assembly. Factory pre-assembled and delivered as a complete package, with no additional ductwork required. Custom engineering is available to match site operating conditions for both fixed and skid-mounted pressurized room.

Core Advantages

●        Pressurization Safety Barrier, Compliant with Zone 1 & Zone 2 Hazardous Area Standards The unit maintains stable positive pressure inside the pressurized enclosure to prevent ingress of flammable and explosive gases. It meets hazardous area explosion protection requirements, safeguarding precision instruments, control systems and field operators. It serves as the core climate control equipment for explosion-proof analyzer shelters.

●        Intelligent Automation for 24/7 Unattended Continuous Operation

Power-fail auto-restart comes as standard. Once power is restored, the unit resumes pre-set operating parameters automatically without on-site manual intervention. An optional RS485 communication port enables remote monitoring via plant SCADA or central control system. Hardwired dry contact interfaces are reserved for fire alarm interlock, integrating seamlessly with modern plant safety systems.

●        High-Performance Heat Exchanger, Mitigate Common Limitations of Conventional Explosion-Proof Air Conditioners

The heat exchanger adopts high-performance internally grooved copper tubes fitted with hydrophilic aluminium or copper fins, fabricated using advanced mechanical tube expansion technology to maximise heat transfer efficiency. The compressor and key refrigeration components are optimally selected for explosion-protected environments. It addresses common drawbacks of traditional explosion-proof air conditioning units: insufficient cooling capacity, poor dehumidification performance and frequent cycling, lowering long-term maintenance costs and extending service life.

●        Integrated Packaged Design for Simplified Installation & Maintenance

Supplied as a complete standalone package, removing the need for complex on-site duct installation. A wide range of models and cooling capacities can accommodate pressurised enclosures of varying volumes. The modular internal layout provides easy access for inspection and servicing. Custom design and development are available for project-specific requirements.

Application Industries & Sites

Oil & gas, petrochemical, biopharmaceutical and other high-risk industries. Suitable for instrument control rooms, explosion-proof analyzer shelters, on-site analytical laboratories, metering rooms and skid-mounted pressurised enclosures located in Zone 1 and Zone 2 hazardous gas areas.