The HCD-135 rectangular industrial control damper has a flanged frame with insulated airfoil blades.
Blade Type: Insulated Fabricated Airfoil
Pressure: Up to 8½ in. wg (2.1 kPa)
Velocity: Up to 4000 fpm (20.3 m/s)
Temperature: -40°F to 250°F (-40°C to 121°C)
