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Square or rectangular ceiling radiation butterfly damper
HVL Series Engineering/Performance Data
3-way register with stiffened 1/2" fan shaped louvers for silent operation
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 16" Duct Opening (front blades parallel to shortest dimension)
Spiral pipe diameter must be 4” larger than Height of the duct opening
Parallel Blade Volume Damper 3000P-24X38 T-Bar Square or rectangular ceiling radiationh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee 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. Options * 3000 PLL Low Leak Air Control
