Volume Damper Low-Leak OBD 3000-0BDLL-66X28 Smoke-Fire Damper Note: Sizes listed are the

Note: Sizes listed are the duct or opening size the grille will fit into

Spiral pipe diameter must be 4” larger than Height of the duct opening

Center margins are mounted on the backside of the grille for a streamlined continuous look

12 & 14" * Mill finish

Spiral Diffuser Radius Flush Mount Diffuser Single Deflec

Volume Damper Low-Leak OBD 3000-0BDLL-66X28 Smoke-Fire Damper Note: Sizes listed are theh3. 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.