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Ships within 48 hours · Estimated delivery Nov 5 - Nov 10
For evaporative coolers or central blower systems
Tool Operated Opposed Blade Damper
Louvers designed with rolled rib for maximum strength and rigidity
Spiral pipe diameter must be 4” larger than the width of the grille
All steel construction
Volume Damper Low-Leak OBD 3000-0BDLL-38X32 Commercial For evaporative coolers or centralh3. 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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