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Heavy gauge steel construction
Hinged removable door with hinges parallel to the longest dimension
Double deflection transition box mount spiral pipe grille
Square or rectangular for vertical mount only
inner dimension and outside dimension available * Available in continuous lengths with butt joints * Tamper proof screws * Standard Color
Volume Damper Low-Leak OBD 3000-0BDLL-40X40 Accessories Heavy gauge steel constructionh3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3.
