Explosion-protected equipment
for ATEX and IECEx zones

Danish distributor

With us, the alarm
stays silent

Most people don't expect to arrive at work and have to run for their lives. But that's what happens with the wrong equipment. We work with ATEX every day, and we always start by understanding the installation before recommending a product. Correctly certified, correctly specified. That is the only way we work.

Case study · Refinery

500 W of heat dissipation inside a sealed Ex d enclosure. Solved without compromising ATEX compliance.

HARDO was tasked with designing a complete Ex d switchgear system to control ventilation and heating at a refinery site. The system needed to power and control a fan, compressor, condenser and electric heater within an ATEX II 2G classified area. Total power dissipation exceeded 500 W. Inside sealed enclosures at ambient temperatures reaching 40°C, this would have pushed internal operating temperatures far beyond the 55°C limit for the installed components.

The solution was to distribute the controls across three separate Ex d enclosures interconnected by Ex e junction boxes, ensuring no single enclosure exceeded 140 W. The most temperature-sensitive components, including the frequency inverters, were positioned at the lowest point in the enclosures where temperatures are naturally lower. The result is a system that maintains stable operating temperatures regardless of weather conditions, in full compliance with ATEX and IEC 60079.