The Semi Automatic Doors System is a sliding door which is opened manually but closes automatically on its own with the help of an air cylinder mechanism. It does not require any electrical connection. Another feature of this door is that it closes softly on the last end making its closing very smooth and silent. The closing speed can be adjusted as per the traffic movement and opening size. The maximum door width possible for this system can be 1000mm and the maximum door weight 80kg. The door can be integrated with standard locks. An ideal application for these doors is rest room entrances, conference rooms etc. The system can be used for frameless glass as well as framed/wooden doors.