They are generally used as the passage doors of cold conditioning process and storage areas in food sector and other sectors (health, chemistry etc.). The passage doors of these areas which are being cooled at potential temperatures of 0C° and above in accordance with the processing and storage conditions of the relevant products may require different qualities and properties on the basis of the production process. Solutions are generated according to the properties and needs of the production facility such as door net passage sizes, features regarding sliding side (right, left, upwards), type of the door (hinged, sliding, folding) and the current carrying system (monorail, conveyor). Doors produced with different alternatives of blade, doorframe and optional accessories that completely meet the needs of the user.