This product has functions of thermal insulation, windbreak, guarding against theft and etc. It is normally used for outside.

Door panel: made of 0.5mm bi-layer color steel filled with polyurethane foam ,the density fo the polyurethane foam is 43kg/sqm

Metal parts :made of 2.5mm hot-dip galvanized steel sheet ,against corrosion and rust .

Balancing system :the torsion spring is made of 602 silicomanganese ,more than 30000 times .

Falling prevention setting :peculiar chip type and blade type falling prevention setting .

Breakage prevention device for torsion spring .

Aluminum alloy door frame ,security lock ,additional door closer

Transmission :adopt the shaft-drive motor

Safety setting :install safety air bag at the bottom of the door leaves ,infrared monitor ,top limit switch .

Operation mode:adopt vertical lifting electric operatiion mode according to the actual operation space .