According to the approvals of the building authorities, all double-leaf fire and smoke protection doors have to be equipped with a door sequence selector. The DICTATOR door sequence selectors assure that both door leafs are closed by the installed overhead or floor closers in the correct order.

Only this guarantees that in the case of a fire both door leafs are completely closed and the fire cannot easily spread further.

In addition, the DICTATOR MK 90 pushing flap makes sure that double-leaf doors do not get jammed, when by accident the passive leaf is pushed open first, e.g. in panic situations.

But also the correct functioning of the door sequence controller is ensured only when the active leaf is opened at least to a certain angle. The MK 90 pushing flap makes sure of this.