High percentage of open area in
DDI blade construction results in lower pressure drop.
Typical DDI BiPlane dampers in
ducts with 3500 ft.per min. velocities cause pressure drops of less than 0.1
inches water column.
The truss design of DDI BiPlane
lover blades maximizes rigidity as much as three times greater than stressed
skin airfoil blades.
DDI Biplane Louver dampers
require far less duct space than a conventional double louver.
DDI BiPlane louver can be
operated with rapid, massive temperature changes.
DDI BiPlane louver is available
with installed internal insulation.
Available in any weldable
Damper Linkage may be parallel
Damper may have independently
actuated operating sections with different linkage in each section.
The economy of a single
actuator instead of the two in a conventional double louver), allows the
addition of an independent actuator to the bottom blade in dust laden