Flammable gases, mists and dusts, together with oxygen, form explosive atmospheres. Ignition of such atmospheres may cause serious damage to personnel and equipment.
An explosive atmosphere occurs if the substance-air mixture lies within a certain concentration range, which is defined as Explosion Limits. Explosion limits depend on the ambient pressure and oxygen concentration of the air.
In order to avoid explosions and consequential dangers, the operator must incorporate effective explosion protection precautions into plant.
The principle of full explosion requires that explosion protection measures be taken in the following order:
Hazardous areas are classified into Zones, depending on the composition and presence of an explosive atmosphere. This enables both selection of suitable equipment and appropriate electrical installation.
Electrical apparatus for use in hazardous areas are assigned to various categories. The additional character G (gas) or D (dust) specifies whether the electrical apparatus may be installed in gas or dust hazardous areas.
The explosion proof equipment for Zone 1 and 2 we offer include:
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