Abstract: The invention relates to a bulkhead door arrangement for sealingly closing an opening which is located between two mutually adjacent spaces and through which a conveyor belt extends. The arrangement includes a vertically moveable door part provided with a sealing strip on the side thereof facing towards the conveyor belt. When the door arrangement is in its closed position, the door part presses the conveyor belt into abutment with a sealing strip provided in the bottom of the opening, and separate sealing devices abut the side edges of the conveyor belt.