Model AC-25R

Low Leakage Control Damper
Single Round Blade

AC-25R low leakage control damper employs a sturdy round frame and a single round blade for automatic air control and manual balancing in medium to high pressure and velocity applications.

Standard Construction

Frame: 12" x 20 ga. (305 x 1.0) galvanized steel.
Blades: 14 ga. (2.0) equivalent galvanized steel - round.
Axles: 1/2" (13) diameter plated steel.
Bearings: Synthetic.
Seals: Polyethylene blade edge seals.
Control Shaft: 1/2" x 3" (13 x 76) round drive axle. 
Minimum Size: 6" Ø (152 Ø)
Maximum Size: 24" Ø (610 Ø)

Ratings

Maximum Leakage: 5.5 cfm/ft² @ 10 in. wg. (0.028 m³/s/m² @ 2.5 kPa)
                                  5.0 cfm/ft² @ 8 in. wg. (0.026 m³/s/m² @ 2.0 kPa)
                                  3.3 cfm/ft² @ 4 in. wg. (0.017 m³/s/m² @ 1.0 kPa)
                                  1.5 cfm/ft² @ 1 in. wg. (0.008 m³/s/m² @ 0.25 kPa)
Temperature: -25^oF to 180^oF (-32^oC to 83^oC)