Model CD-81R

Industrial Control Damper
Single Blade - Round

CD-81R control damper employs a rugged round channel frame and a single round blade for automatic air control and manual balancing in medium to high pressure and velocity applications.

Standard Construction

Frame: Galvanized steel channel.

Blades: Galvanized steel.

Axles: Plated steel.

Bearings: Bronze.

Control Shaft: 6" (152) long round drive axle.

Minimum Size:
4" Ø (122 Ø)

Maximum Size:
60" Ø (1524 Ø)

Ratings

Leakage:
54.0 cfm/ft² @ 10 in. wg. (0.28 m³/s/m² @ 2.5 kPa) 
50.0 cfm/ft² @ 8 in. wg. (0.26 m³/s/m² @ 2.0 kPa) 
35.0 cfm/ft² @ 4 in. wg. (0.18 m³/s/m² @ 1.0 kPa)
18.0 cfm/ft² @ 1 in. wg. (0.09 m³/s/m² @ 0.25 kPa) 

Temperature:
-25^oF to 250^oF (-32^oC to 121^oC)