Blade Type - Air Balance

Tear-Drop

Air efficiency for your backdraft dampers. Tear-drop blades have a rounded edge and an off-center blade axle. These blades open with airflow and close on their own. Keep air moving efficiently in one direction.

Tear-drop blades are available for backdraft dampers.

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BID4

4" Deep Heavy Duty Teardrop Blade Formed Steel Backdraft Damper

BID4

Maximum Velocity (FPM): 2500 fpm
Max Static Pressure: 10 .in w.g. @ 1000 fpm
Pressure Drop: .67 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Tear-Drop
Blade Action: Parallel
Pressure Drop: .67 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2500 fpm (FPM)
Temperature Rating (°F): 180 °F

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BID8

4" Deep Aluminum Teardrop Blade Backdraft Damper

BID8

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 8 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum, Extruded Aluminum 6063 Alloy, or Galvanized Steel
Blade Type: Tear-Drop
Blade Action: Parallel
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -40 °F to 190 °F

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BID9

10" Deep Aluminum Teardrop Blade Backdraft Damper

BID9

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .075 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Tear-Drop
Blade Action: Parallel
Pressure Drop: .075 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -30 °F to 190 °F

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