Description：
The valve is kept to be opening, and it is fixed on the ventiduct of the aircondition system and the place where has the requirement of ventilation ,
when the temperature is over 70℃, the valve will close automatially, reposition manually.
 
Features:
Smoke sensor, close the valve manually
when it ireachs 70℃,fusing chip is working ,and  the vavel closes automatically.
The vane of valve is between 0°-90°, the volume can be adjusted in 6 levels.
Can input the close signal.