Model AC-57

Control Damper
Aluminum Airfoil Blade

The AC-57 control damper employs fully symmetrical aluminum airfoil blades and a rugges aluminum hat channel frame to provide extremely low leakage and exceptional air performance in medium to high pressure and velocity applications.

Standard Construction

Frame: 5" x  1" (127 x 25) 6063-T5 aluminum hat channel 0.125" (3) thick. Low profile head and sill used on sizes less than 13" (330) high.
Blades: 6063-T5 0.070" (1.8) thick heavy duty, dual wall extruded aluminum airfoil. Parallel action.
Axles: 1/2" (13) diameter plated steel hex.
Linkage: Concealed in frame.
Bearings: Synthetic.
Control Shaft: 1/2" x 6" (13 x 152) round drive axle with outboard shaft support bracket and bearing supplied on all single section dampers for field installation. Factory installed 3/4" (19) diameter jackshaft on all multiple section dampers.
Minimum Size: 6" x 5" (152 x 127)
Maximum Size: Single Section: 60" x 74" (1524 x 1880)
                           Multiple Sections: Unlimited

AMCA Certified for Air Leakage and Air Performance
 

Ratings

Leakage class: 
1A - 3.0 cfm/ft² @ 1 in. wg. (0.015m³/s/m² @ 0.25 kPa)
1 - 4.0 cfm/ft² @ 1 in. wg. (0.020m³/s/m² @ 0.25 kPa)
1 - 8.0 cfm/ft² @ 4 in. wg. (0.041m³/s/m² @ 1.0 kPa)
1 - 11.3 cfm/ft² @ 8 in. wg. (0.057m³/s/m² @ 2.0 kPa)

Temperature: 
-25^oF to 180^oF (-32^oC to +83^oC) with synthetic bearings
-72^oF to 275^oF (-58^oC to +135^oC) with stainless bearings