Pressurized enclosures (Exp)
The principle of this protection is to prevent the entry of an explosive atmosphere to inside of the enclosure by means of a protective non-combustible gas inside the enclosure maintained at a pressure higher than the pressure of the surrounding explosive atmosphere.
- Pressurized enclosures offer the optimum solution for many applications in hazardous areas in zones 1, 2 and 21, 22 - especially where, due to dimensions, internal equipment or operating conditions, a standardised explosion-proof (Ex e) or (Ex d) version cannot be used.
- The use of common industrial devices inside the enclosure allows faster and more affordable system design, installation and commissioning and greater design flexibility compared to other types of protection.
- They allow easy access to the built-in instruments and thus their maintenance.
- The continuous flow of clean, moisture-free air contributes to better heat and moisture dissipation from the inside of the enclosure, resulting in higher reliability and durability.
- If required, a certified active cooling or air conditioning system can be used.
- Compared to a explosion-proof distributors (Ex d), pressurized enclosures are generally a more cost-effective solution when larger dimmensions are required and also have a significantly lower weight.