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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
NGD - Narrow ceiling grid dimples for 9/16" T-Rails
Delivers supply air in a 360°air pattern
* 3100 Series - Face and By-Pass dampers * Sleeve variations * 12 gauge galvaneal construction * Flat head and sill frame construction * Extended square operating shaft (extending 7-1/2" beyond the air control frame) * Round operating shaft (1/2" diameter) * Oil impregnated bronze bushings * Spring closed or spring open dampers * Outside mounting flange * Direct mount damper motors * Fractional and odd sizes available
Recommended Minimum Sleeve Thickness for Fire Dampers
Volume Damper Low-Leak OBD 3000-0BDLL-48X24 Residential Registers & Grilles NGD - Narrow ceiling gridh3. 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.
