GD26 / GD27
Volume Control Damper
5½” Deep Airfoil Blade Parallel or Opposed Blade • Steel Control Damper
STANDARD CONSTRUCTION
Frame
Blade
Blade Type
Axle materials
Bearings
Blade Seal
Linkage
Finish
: 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
: Mill
OPTIONS
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Exact Size
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Sleeve - Transition - Sideplate
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Flange - Front, Rear, or Both
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Blade Seal - Silicon
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Jamb Seal - Stainless Steel
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Jackshafting
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Actuators - Manual Quadrants, 120V, 24V, 230V or Pneumatic
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Bearings - OIB or Stainless Steel
DATA SHEETS
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Installation Instruction
NOTES
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Supplementry Information
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“A” width and “B” height are opening dimensions. Dampers are provided ¼” undercut.
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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.
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Dampers more than one panel wide operated with one actuator must be jackshafted.
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Dampers may be installed vertically or horizontally, but we do not recommend installation with the blades in the vertical position