UL/cUL Listed UL listed as Fire Door Coordinator
The device evaluated in accordance with Standard UL 10C
This door coordinator is used on double doors when the inactive door needs to close before the active door which has equipped with or without overlapping astragal. It can prevent the active door from closing earlier than the inactive door, because the unit has an Active Door Hold Open Lever & Inactive Door Release Trigger as shown in attated file, this mechanism permits the active door to close and latch after the inactive door, thus both leaves can avoid collision each other.
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