Explosion-proof enclosure system with a smaller footprint
R. Stahl Schaltgeräte
The EXpressure technology (photo) can safely dissipate explosion pressure in control boxes, power distribution boards and other enclosures via flow channels in multi-layer stainless-steel wire cloths. The controlled gas flow and heat absorption through special wire-cloth elements reduce the internal pressure increase that occurs after an explosion in the enclosure by several orders of magnitude compared to conventional Ex d enclosures, says the company. If explosion pressure increases of 7 to 12 bars have to be contained in a conventional flameproof enclosure, the maximum inner pressure in an EXpressure enclosure is less than 1 bar. While some enclosures may require a wall thickness of 10–20 mm, EXpressure enclosures achieve comparable protection with walls that are approximately 3 mm thick. Hall 11.1, Stand C45 — R. Stahl Schaltgeräte GmbH, Waldenburg, Germany