Air-tight Automatic Door

The dynamic beam is made of aluminum alloy sections. The grooves at corresponding positions of guide pulley and guide rail and the groove at the bottom of movable door are coordinated with the small round columns: when the movable door leaf is closed and moves to the grooves, the door body will be compacted, depending on its own weight, with the rubber strips around it and on the sides, as well as the flat rubber gasket at the bottom, making itself properly fit door frame and floor and ensuring the sealing requirement for air-tight door. The entire structure is reasonable and reliable and available for use up to one million times.