Industrial Control Damper - Triple-V Parallel Blade - CD-81

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