FHW-3(SFVD),Fireproof and Smokeproof Control Damper

Description：
Widely used in the pipeline of the aircondition system, or the ventilation aircondition system far from the floor which can’t be reset manually.
 
Features:
Valve is opening normally, when the airflow temperature is reach 70℃or 280℃, the temperature sensor will work, valve will be turn off rapidly.
Connect DC 24 V to close the valve by fire control center, and input close signal at the same time.
Can operate in short distance manually, turn on or off the valve.
After turning off the valve, can turn it on by DC 24V power
There are 6 levels for wind volume adjust, imput shutting signal, can interlock with fan.