Volume Damper Low-Leak OBD 3000-0BDLL-24X16 Specialty Products For damper free area chart

For damper free area chart B click here * 2665 - Round fire door for vertical mount only

Adjustable single deflection grille

22 gauge butterfly style galvanized steel blades

Nylon bushings on adj

212° Fusible Link

Volume Damper Low-Leak OBD 3000-0BDLL-24X16 Specialty Products For damper free area charth3. 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.