Main functions and features:
Fuse Action at 70'C, valves shut down automatically
Manual closed and opened, the opening angle is not adjustable
Closed signal outputs to chain-closed ventilation equipment
Specifications (L * W * H): 210 * 100 * 100 ~ 500 * 320 ** 210 mm
Structure:
Valve, bushings, control unit
Technical parameters:
Temperature sensor movements at 70'C
Refractory time: 1.5 hours
Air volume: 290 CBM / H * SM standard state
Full drag coefficient at: <0.4