Volume Damper Low-Leak OBD 3000-0BDLL-70X40 Accessories with 54% free area

with 54% free area

Maximum dimension 60x60 single

linkage and handle enclosed in valve to assure trouble-free operation * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White Options * SCB41 - 4-way air pattern * SCB31 - 3-way air pattern * SCB41 O or SCB31 O - steel lever operated opposed blade damper * SCB42 or SCB32 - no damper * Tamper proof screws * Standard Color

Ceiling opening must be 4” larger in length and width than the nominal duct size

Install with louvers in up or down position for best duct concealment

Volume Damper Low-Leak OBD 3000-0BDLL-70X40 Accessories with 54% free areah3. 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.