Our DC250 mullion is easy install. This door hardware product is used on double doors when inactive door needs to close before active door.
Angle type coordinator
In the case of a fire breaking out, even if the door which should close afterwards, begins to close first, it will be held back by the regulator until the other door has closed. Then, the lever of the regulator will disengage, permitting the remaining door to close and thus the function of the fire door will be completely fulfilled.
IMPORTANT: Order items according to the specific number of pieces required, not by box or package. To avoid any potential extra costs for partial boxes try to order an item quantity that resolves to full boxes or packages.