Most fire-rated pairs of doors are equipped with either fire exit hardware (panic devices) or a lockset on the active leaf and automatic flush bolts on the inactive leaf.  The exception to this would be doors leading to unoccupied spaces such as electrical, mechanical, or boiler rooms.

大部分防火双门要么是配备消防出口硬件（紧急装置）要么就是在活动门扉上装锁具还有在固定门扉上装自动埋头螺栓。例外情况就是通向电气，机械或锅炉房这些闲置空间的门。

Automatic flush bolts are projected when the active door closes and engages the triggers, and when the active door opens the auto flush bolts retract.  This means that in order for the doors to close and latch, the inactive leaf with the automatic flush bolts has to close before the active leaf.  The same situation occurs when a pair of fire doors is equipped with an overlapping astragal – the proper leaf has to close first.

自动埋头螺栓的设计原理是，当活动门关闭的时候，接合触发器；当活动门打开的时候，自动埋头螺栓缩回。也就是说，为了门能阖上，带自动埋头螺栓的固定门扉必须在活动门之前关闭。同样的也发生在，当两扇防火门装备有重叠圈线时，对应的门必须先关上。

The function of a coordinator is to ensure that the leaves of a pair close in the proper sequence.  Two common types of coordinators are gravity coordinators which are mounted on the frame face (top right), and bar-type coordinators which are mounted on the underside of the frame head (bottom right).  If both leaves of the pair are opened and the active leaf begins to close first, the coordinator holds the active leaf open a few degrees to allow the inactive leaf to close first.  When the inactive leaf is in the closed position, it engages the release mechanism on the coordinator which then allows the active leaf to close.

协调器的功能就是保证门扉按正确顺序关上。有两种普通的协调器，一种是重力协调器，安装在帧面上（右上角），另一种是棒条协调器，安装在帧头（右下角）。如果两扇门扉都开着，当活动门扉开始先关上的时候，协调器会阻止，留下一定的角度，让固定门扉先关上。当固定门扉处于关闭状态，它会释放协调器的机械装置，让活动门关上。

Sound complicated?  It is!  Coordinators and automatic flush bolts can be a problematic application, so fire exit hardware is definitely preferred where possible.  If fire exit hardware can’t be used, holding the doors open with approved hold-open devices that release upon fire alarm can help by reducing the frequency of use.

听起来复杂？的确是的，协调器和自动埋头螺栓可能是有问题的应用设备，所以在可能用到的地方，安全出口硬件绝对是首选。如果不用安全出口硬件，用经认可的门开敞装置来敞开大门，触动火灾报警后可以帮助减少使用频率。

防火门中英文介绍