The guide rails of rolling shutter door are installed at two sides of the opening, the curtain sheet is clamped between the two guide rails, and transmission shaft is installed above the opening.
The rolling shutter door slats is connected with the transmission shaft through a spring, and the transmission shaft is driven by the rotation of door operator so as to make the curtain sheet rolled or set down along the outer diameter of the transmission shaft, realizing the effect of opening and closing. 
The owest side of the curtain sheet and two sides of the guide rail are equipped with dust/wind sealing strips. 
The door operator with a manual device may be adopted at the place where power failure occurs frequently, which can guarantee the door can be opened manually in the event of power failure.
This rolling shutter doors are applicable to indoor or outdoor installation.
As an experienced rolling shutter doors manufacturer, Xufeng door can provide high quality rolling shutter door with competitive pricing. 
If you interested in industrial rolling shutter door, please contact with us.