Dorma

The heavy-duty 8900 Series non-handed surface applied closer
with adjustable spring power and backcheck positioning adjustment.
The 8900 has intensity adjustable hydraulic backcheck
that will take effect at approximately 65º. The 8900 has two
independent, noncritical adjustment valves to control sweep and
latch closing speeds. The backcheck positioning valve maintains
an effective backcheck range on parallel arm applications. The
8916 will be available with field adjustable spring power from size
1 to 6 for barrier-free requirements.

Dorma Conversion Plate BP86C

use this plate with the 8616 to convert the old style 7601 and 7801. By using this plate you will not have to redrill holes