The GBLM iris dampers can be provided with actuators.
The GBLM iris dampers are used for smooth control of
the duct air pressure. The lever and the iris blade
mechanism allow changing the clear opening diameter
in infinitely variable steps.
The iris-type closure allows choking the air flow without
turbulence or in-duct noise.
The GBLM iris damper can be installed both in air supply
and air exhaust ducts. It also features two output ports
as an interface for an air flow meter. The full-clear opening
of the iris damper helps with cleaning internal surfaces of the ductwork
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