1) Normally open. When the airflow temperature reaches 70℃, the fuse drives the valve close automatically. 2) Close the valve through DC24V. 3) Manual opening or reset. 4) Reset the valve to open the condition through DC24V after closing the valve....
Fire damper, fire and smoke dampers, smoke vent, exhaust fans, exhaust ducts, and louvers, etc; electric window opener, linear actuator window openers, chain type window openers, Hand-cranked window openers, and remote control panel, etc.