DDI BiPlane Damper Construction

  • 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 material.

  • Damper Linkage may be parallel or opposed.

  • 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 horizontal ducts.