Structure:
All the slats are galvanized steel structure and plastic-sprayed. It's anti-corrosive. All of the reels are seamless steel tubes, so it's good hot-bend resisting.

Fire-resisting:
Class F4(3.0h). Examined by National (Tianjin) Fire Test Centre.

The Control system:
A. Two times slip down automatically when it receives the smoke alarm.
B. It will slip down first time when it gets the smoke alarm, second time when the thermal alarm; once the thermal alarm cancels, the slip down will stop.
Function A and B can be alternating in the same system, it works by users' selection.

Stop When Encountering Barriers:
The roller shutters will stop automatically when encountering barriers and persons during its shutting down. It will shut down automatically after barriers and persons leave.

Push any key to escape:
After the roller shutters have shut down when fire occurs, people only need to push any key in the key-box if there is someone have not left the fire place. Then, the shutters will open automatically. After several minutes, the roller shutters will automatically shut down. This can be realized repeatedly.

Mechanical System:
It realizes the slide down by the weight in manual control. According to the buyers' requirement, mechanical fuse thermal break device can be installed. When the temperature reached 70º C, it slides down automatically.

Safety device:
The chain protective device can be installed for safety operation.

Large span:
The largest doors in domestic market are 18 meters width, which were installed in ZhuHai International Airport and WuHan ZhongShong Plaza.