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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
Standard Features Double deflection surface mount grille with adjustable airfoil blades Front blades parallel to longest dimension
Powder coat finish
Square or rectangular ceiling radiation butterfly damper
904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 20" Duct Opening (front blades parallel to shortest dimension)
Volume Damper Low-Leak OBD 3000-0BDLL-60X30 Accessories linkage and handle enclosed inh3. 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.
