Volume Damper Low-Leak OBD 3000-0BDLL-38X30 Step Down Ceiling Diffuser UL listed and tested in

UL listed and tested in accordance with UL Standard 555

850 Series Engineering/Performance Data

Extended sleeve (2751)

Nylon bushings on adj

Volume Damper Low-Leak OBD 3000-0BDLL-38X30 Step Down Ceiling Diffuser UL listed and tested inh3. 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.