GD1 / GD2
Volume Control Damper
Single Thickness Blade • Steel Control Damper
: 5½” x ⅞” x 16-GA galvanized steel hat channel
: Galvanized steel
: 16-GA galvanized steel, 6” nominal width
: Plated Solid Steel stub
: Heavy Duty Molded Acetal
: In-jamb, plated steel bar and crank plate with stainless
Blade Seal - Silicon / Neoprene
Sleeve - Transition - Sideplate
Flange Frame - Front, Rear or Both
Electric Actuators - For motorised application 230V, 120V or 24V
Bearings - OIB or Stainless Steel
Jamb Seal - Stainless Steel
“A” width and “B” height are opening dimensions. Dampers are provided approximately ¼” undersize.
Dampers shorter than 12” are single blade.
Maximum face velocity is 2000 fpm. Maximum differential pressure is 4 in.wg.
Multiple panel unites are shipped with the panels factory assembled, to a maximum of 48ft2. When jack shafting is designated, it will be installed. When it is desired to have the individual damper panels shipped loose, this must be clearly noted.
Dampers with multiple panels in both width and height require structural support (by others). It is recommended that large opening be divided with structural members such that dampers will span either the width or height of each opening between the structural members with a single panel.
The GD1/GD2 is designed to operate in a clean, dry environment. For proper operation, dampers must be installed square, plumb, and without racking.