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Double deflection radius mount spiral pipe grille with adjustable blades
Stainless steel
UL listed and tested in accordance with UL Standard 555C
available 4" through 40" round (2549)
Volume Damper Low-Leak OBD 3000-0BDLL-20X16 Accessories Double deflection radius mount spiralh3. 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.
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