Door closer is installed in a upper portion of way opening flatdoor fan, be applicable to the wood, steel evacuation door, firedoor and have a higher requirements place doors.

Its main role is to:
A, Ensure fire door at the state of emergency in the closed state;Protection of building the user''s life safety, prevent the spreadof fire and smoke.
B, Control door open, closed, protect users, door and doorhardware.
C, Ensure door lock device (mechanical lock, electric lock, etc.)work normally.
D, Energy-saving, sound proofing.