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Performance Data With Opposed Blade Damper
HVL Series Engineering/Performance Data
Spiral pipe diameter must be 4” larger than the width of the grille
T-Bar hinged 2 Cone Step Down Diffuser with Round Collar
904 - Double Deflection Adjustable Aluminum Blade Grille For a 34" x 18" Duct Opening (front blades parallel to shortest dimension)
Opposed Blade Volume Damper 3000-0BD-60X46 Commercial Performance Data With Opposed Bladeh3. 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.
