DICTATOR Door Checks Make Sure Hinged Fire Doors Are Reliably Closed
Often fire doors don’t close completely in spite of a closing device, possibly because a second door situated in a short distance to this door is closed. The air in this “interlock” functions as an air cushion and thus prevents the complete closing of the door. In case the second door is open, however, the fire door usually will close with a loud bang.
The DICTATOR door checks present the solution.