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The fast door PRAP stackable model is specially designed to work 
under pressure or air depressions , being therefore indicated placement
in holes that are placed outward. Usual itsjust behind the doors of 
enclosure of the installation position . This model incorporates interior 
horizontal crosspieces for reinforcement which gives extreme rigidity and 
allows to reach the majority of existing sizes.

[themify_icon icon=”fa-file-pdf-o” label=”Datasheet ESP” link=”” ]