Fitted as a locking device on double-leaf door-sets on the passive door-leaf. (The passive door-leaf is the one normally not used for passage.)
Download our Guide OLDA Flush bolts 2019 v3
Manual flush bolt
Both release and locking of the passive door-leaf is made manually. All our manual flush bolts is operated by a lever-mechanism.
Automatic flush bolt
Release of passive door-leaf is done automatically, when the active door-leaf is opened, and the falling latch is released. Locking is obtained automatically when active door-leaf closes, when the falling latch is pushed in and thereby activates the bolt. Automatic flush bolts is often recommended where fire-proof demands exists.
Semi-automatic flush bolt
Release of passive door-leaf is done manually. Locking is obtained automatically when passive door-leaf closes. The bolt is constantly activated, which means that this flush bolt can only be fitted at the top of the passive door-leaf. Recommended as a complementary product where an automatic flush bolt is installed at the bottom of the passive door-leaf. This installation results in an easy made manual releasing sequence and a secure locking sequence in two steps, which also contributes to a smoother closing of the door-set.
How to choose the right type of flush bolt?
OLDA automatic and semi-automatic flush bolts are ordered and fitted according to the following:
The “passive” door-leaf is the one normally not used for passage.
If left door-leaf is passive:
Choose flush bolt type2 (“right”) for top fit and type1 (“left”) for bottom fit.
If right door-leaf is passive:
Choose type1 (“left”) flush bolt for top fit and type2 (“right”) flush bolt for bottom fit.