This GMD-SP series control damper is made of steel. It measures 57 inch width, 57 inch height, 12¾ inch length. This control damper has one phase, 50/60 Hz, 57 inch diameter, and 3 Amps.
Technical Specs
ItemControl Damper
Number of Panels2
Overall Length12 3/4 in
For Duct ShapeSquare
Frame Material Thickness14 ga
Maximum Air Pressure4 in wg
Rough Opening Length55 in
Damper TypeDynamic
Nameplate Voltage24V DC, 240V AC
Closure Pressure Rating4 in wc
Closure Velocity Rating3,500 fpm
CounterbalancedNot Counterbalanced
Mounting PositionHorizontal, Vertical
Pressure Drop @ 1000 fpm (AMCA 5.2)0.15 in wg
Frame Less Flange54 sq in
Jamb Seal MaterialStainless Steel
StandardsNEC, OSHA
Maximum Temperature Rating122 Degrees F
Full Load Current3 A
Bushing MaterialBrass
Damper FinishPlain
Frame MaterialSteel
Frequency50/60 Hz
Damper ApplicationMotorized
Overall Height57 in
Rough Opening ShapeSquare
Overall Width57 in
Blade MaterialGalvanized Steel
Overall Diameter57 in
Rough Opening Width55 in
Maximum Air Velocity3,500 fpm
Rough Opening Diameter55 in
Blade OrientationParallel Blades
Blade TypeFlat Blade
Free Area18.8 sq ft
Switch ActionNormally Open
Flange TypeReversed Flange
Flange Width1 1/2 in
Airflow DirectionHorizontal, Vertical
Phase1
Includes MotorMotor Included
Axle MaterialPlated Steel
Blade Material Thickness16 ga
SeriesGMD-SP
Motor Bracket Extension10 1/4 in
Country of OriginUnited States
(subject to change)
Compliance and Restrictions
This item has been restricted from sale in the following Regions:
Quebec
.