Volume Damper Low-Leak OBD 3000-0BDLL-64X20 T-Bar Extruded aluminum surface mount frame

Extruded aluminum surface mount frame with signature line marks

linkage and handle enclosed in valve to assure trouble-free operation * Soft White Options * 955 O - steel opposed blade damper * Tamper proof screws * Standard Color or Designer Color Finish available on this product

Step down core designed for 4-way uniform air distribution

60% free area * Soft White Options * Countersunk screwholes with matching Phillips #8 x 1-1/2" oval Screws * 10 or 12 gauge steel * Tamper proof screws

Designed for large volume air delivery

Volume Damper Low-Leak OBD 3000-0BDLL-64X20 T-Bar Extruded aluminum surface mount frameh3. 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.