Function descriptionFunction description
FK 3-12 spring operating mechanismsFK 3-12 spring operating mechanisms
48-020-212EN0248-020-212EN02
The FK 3-12 third-generation spring operating mechanisms have been de-The FK 3-12 third-generation spring operating mechanisms have been de-
signed as an integrated series. All mechanisms have the same functional unitssigned as an integrated series. All mechanisms have the same functional units
and operate on the same principle. Dimensions and certain execution featuresand operate on the same principle. Dimensions and certain execution features
are dictated by the maximum closing energy for each model.are dictated by the maximum closing energy for each model.
Fonctional unitsFonctional units
70.23 70.21 70.2070.23 70.21 70.20
70.13 Manual 70.13 Manual