Mechanical · M-495Q2

Rectangular Duct Damper and Connection Detail

Materials

Metal (misc.)

Elements

Connections / Plates

Connections

Welded Connection

About this detail

This isometric and sectional detail shows a forty-five degree rectangular duct connection with a branch runout and an internal damper. The twenty-two gauge damper blade features a V-groove and is operated by a half-inch control rod secured with straps, rivets, or tack welds. The blade connects to a half-inch spring-loaded end, maintaining a quarter-inch clearance on all sides from the duct liner or wall. Blade quantities scale with duct depth, utilizing one blade up to twelve inches, two up to twenty inches, and three up to thirty inches. A locking quadrant is mounted externally on the duct to control the damper position.

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