Volume Damper Low-Leak OBD 3000-0BDLL-42X20 Residential Registers & Grilles Steel riveted and metal formed

Steel riveted and metal formed assembly

listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square Collar

Accessory to the 90 Series

Single deflection transition box mount spiral pipe grille

floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application

Volume Damper Low-Leak OBD 3000-0BDLL-42X20 Residential Registers & Grilles Steel riveted and metal formedh3. 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.