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Round ceiling radiation butterfly damper
Concealed mounting holes with mounting screws
UL listed and tested in accordance with UL Standard 555
Soft white
Stamped steel face with roll formed frame
Volume Damper Low-Leak OBD 3000-0BDLL-38X30 Step Down Ceiling Diffuser Round ceiling radiation butterfly damperh3. 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.
