Blade Type - Air Balance

True Round Straight

Tight closure for round ductwork. True round straight blades cover the opening for round dampers. These blades have minimal effect on the airstream, providing maximum air performance when the unit is fully open.

True round single thickness blades are available for round control dampers and round balancing dampers.

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RC

Class I True Round Combination Fire-Smoke Damper

RC250, RC350

Maximum Velocity (FPM): 3000 fpm

Material Options: Galvanized Steel
Blade Type: True Round Straight
Frame Shape: Round
Pressure Drop: .015 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Fire Resistance Rating (hrs): 1.5 hrs.
Temperature Rating (°F): 250 °F to 350 °F

RS

Class I True Round Smoke Damper

RS250, RS350

Maximum Velocity (FPM): 3000 fpm

Material Options: Galvanized Steel
Blade Type: True Round Straight
Frame Shape: Round
Pressure Drop: .02 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): 250 °F to 350 °F