1.This release device consists of electromagnetic door stopper and fire proof system. It can keep the door opening in normal, In case of fire, self-closing function is activated, to achieve fail-secure. Normally, it’s powered by the city, does not take fire power resources.Usually just keep the fire channel open, In case of fire, can achieve the role of “smoking and fire stopper of fire doors, so as to ensure the safety of personnel and financial;
2. Only can be installed on the floor ;
3. Apply to wooden door and framed door .
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