DAMPER GIVES BETTER PERFORMANCE AND LOWER PRESSURE DROP.
double wall air sealed DDI BiPlane louver damper has no equal where
total isolation by a louver style damper is required.
rigid blade structure and aerodynamically clean blade faces assure
predictable flutter control whether the linkage is parallel or opposed.
single set of shafts allows the number of blades to be minimized. Even
wide blades can be contained within the minimum duct space required by a
addition to eliminating the need for a second set of shafts, the wider
blades allowed can reduce the number of blades in the damper. The
smaller number of shafts substantially reduces the bearing and packing
maintenance and operating torque.
DDI BiPlane can advantageously replace some guillotine dampers. It
eliminates the need to continuously run a seal air fan in applications
where the damper is normally open. The savings in fan motor power
consumption will pay the entire cost of the Biplane double louver. In
addition, the BiPlane minimizes cooling of the duct gases and eliminates
air dilution when the damper is open.
sealing plane of the DDI BiPlane damper is barely thicker than the
blades themselves. This compact structure allows much more freedom
of duct design than a conventional double louver.