GD26 / GD27
Volume Control Damper
5½” Deep Airfoil Blade Parallel or Opposed Blade • Steel Control Damper
: 5½” x ⅞” x 16-GA galvanized steel hat channel
: Galvanized steel
: 22ga Double Skinned airfoil (equivalent to 16ga)
: Plated Solid Steel stub
: Heavy Duty Molded Acetal
: Neoprene on Blade edges
: In-jamb, plated steel bar and crank plate with pivots
Sleeve - Transition - Sideplate
Flange - Front, Rear, or Both
Blade Seal - Silicon
Jamb Seal - Stainless Steel
Actuators - Manual Quadrants, 120V, 24V, 230V or Pneumatic
Bearings - OIB or Stainless Steel
“A” width and “B” height are opening dimensions. Dampers are provided ¼” undercut.
Depending upon damper height, a variable width blade may be required, which will extend to a maximum of 3¼ from either the front or back of the damper If the exact dimensions of this variable blade is critical contact the factory.
Dampers more than one panel wide operated with one actuator must be jackshafted.
Dampers may be installed vertically or horizontally, but we do not recommend installation with the blades in the vertical position