Model AC-91

Industrial Control Damper
Airfoil Blade

AC-91 control damper employs double skin airfoil blades and a rugged flanged frame for automatic air control and manual balancing in medium to high pressure applications.

Standard Construction

Frame: 8" x 2" x 14 ga. (203 x 51 x 2) galvanized steel channel. 
Blades: 6" x 14 ga. (152 x 2.0) equivalent galvanized steel - airfoil. Parallel.
Axles: 1/2" (13) diameter plated steel hex.
Linkage: Concealed in frame.
Bearings: Stainless steel sleeve-type, pivot in bushing, press fit into frame.
Control Shaft: 1/2" x 6" (23 x 152) round drive axle with shaft support bracket and bearing mounted to damper frame with factory mounted/welded manual locking quadrant.
Lifting Lugs: 7/8" (22) diameter, one on each jamb of frame.
Minimum Size: 8" x 6" (203 x 152)
Maximum Size: Single Section: 48" x 96" (1219 x 2438)
                           Multiple Section: Unlimited

Ratings

Leakage: 4.2 cfm/ft² @ 2 in. wg. (0.02 m³/s/m² @ 0.5 kPa) with low leakage seals
                 6.4 cfm/ft² @ 4 in. wg. (0.03 m³/s/m² @ 1.0 kPa) with low leakage seals
                 17.8 cfm/ft² @ 8 in. wg. (0.09 m³/s/m² @ 2.0 kPa) with low leakage seals

Temperature: -25^oF to 250^oF (-32^oC to 121^oC) available up to 450^oF (232^oC) when required - consult with Pottorff