Fast opening and closing

Running speed comparation:

Sectional door: 0.3m/s; 

Traditonal roller shutter door: 0.06-0.08m/s;

So, sectional doors are four times the speed of a tradtional roller shutter door.  It opens and closed much faster. This bring several big benefits:

• Improve work efficiency:  Workers or forklifts will no need wait long time in front of the door. The material handling speed is higher by at least 3 times than tradional roll up doors; 

• Keep clean and hygiene: The fast running reduces the open time to only seconds in a cycle of passing the door. Thus much less outside air and dust will enter the room; 

• Keep temperature: Heat loss is reduced by large by reducing open time.

Thermal insulated

Door panel is sandwich structure. Total thickness: 40mm. Two surface layer is 0.326mm galvanized steel plate. Middle is filled with high density fire ratardant polyurethane foam. Foam Density: 12—14kg/m2. 

At the joint area, there is a special cold-bridge design, to avoid direct heat conduction through surface steel sheet. 

Thermal insulation ratio:   4.5W/m. h.

For this reason, such door is widely seen in cold rooms and warehouses