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Pottorff > Air Control and Backdraft Dampers > Air Control Dampers > Industrial > CD-81

Model CD-81

Industrial Control Damper
Triple-V Blade

CD-81 control damper employs a rugged channel frame and triple-V blades for automatic air control and manual balancing in medium to high pressure and velocity applications.

Standard Construction

Frame: 8" x 2" x 14 ga. (203 x 51 x 2.0) galvanized steel channel 

Blades: 6" x 16 ga. (152 x 1.5) galvanized steel - triple-V. 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 5" (13 x 127) round drive axle with shaft support bracket and bearing mounted to damper frame with factory mounted/welded manual locking quadrant.

Minimum Size:
One Blade: 6" x 6" (152 x 152)
Two Blades: 6" x 10" (152 x 254)

Maximum Size:
With Seals: 36" x 72" (914 x 1829)
Without Seals: 48" x 72" (1219 x 1829)                       

Ratings

Velocity:
3000 fpm (15.2 m/s) for Width (W) ≤ 36" (914)
2000 fpm (10.2 m/s) for Width (W) > 36" (914)

Leakage:
13.0 cfm/ft2 @ 10.0 in. wg. (0.07 m3/s/m2 @ 2.5 kPa) with low leakage seals
11.0 cfm/ft2 @ 7.0 in. wg. (0.06 m3/s/m2 @ 1.8 kPa) with low leakage seals
8.0 cfm/ft2 @ 4.0 in. wg. (0.04 m3/s/m2 @ 1.0 kPa) with low leakage seals

Temperature:
-65oF to 250oF (-54oC to 121oC) with no seals or with silicone seals
-10oF to 150oF (-23oC to 66oC) with PVC seals

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