Volume Damper Low-Leak OBD 3000-0BDLL-60X38 Step Down Ceiling Diffuser PERFORMANCE DATA FGAD Series Engineering/Performance

PERFORMANCE DATA FGAD Series Engineering/Performance Data

3/16” holes on 1/4” staggered centers Extruded aluminum frame with signature line marks Perforated material 58% free area Countersunk mounting holes for flush appearance with color matching Phillips posi- drive screws Rust resistant pre-coat with durable powder finish Soft White

904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 4" Duct Opening (front blades parallel to shortest dimension)

Countersunk mounting holes for flush appearance with stainless sheet metal screws

Volume Damper Low-Leak OBD 3000-0BDLL-60X38 Step Down Ceiling Diffuser PERFORMANCE DATA FGAD Series Engineering/Performanceh3. 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.