AVRD 33 is an ultra-low leakage steel butterfly control damper which has been designed for all types of round ductwork applications. Suitable for use in low to medium pressure and velocity commercial HVAC systems, the AVRD33 installs quickly and easily, saving money on installation costs.
Design features a sturdy beaded casing for superior rigidity, a 20 ga. equivalent laminated blade double Bolted/Riveted to the drive shaft for maximum strength, long life corrosion resistant synthetic / Nylon bearings and blade seals for low leakage requirements. The damper can be used for two position or modulating control using electric actuators and can also be used as a manual balancing Damper or when positive shut-off is required by utilizing an optional hand locking quadrant. A variety of options are available to meet specific installation requirements and electric actuators are available for factory or field mounting.
OPTIONAL CONSTRUCTION :
Frame : 24 ga. corrosion-resistant steel with stiffening beads.
Blades : 24 ga. corrosion-resistant steel. 90 degree rotation.
CCW to open.
Bearings : 12mm Nylon
Drive Shaft/Axle : 12mm. plated steel double bolted / Riveted
to blade. Axles extends approximately 6″ (152) beyond the frame.
Blade Seal : Cross-linked polyethylene.
