Model CD-42

Control Damper
Triple-V Opposed Blade

CD42 control damper employs a triple-V blade and a rugged hat channel frame for automatic air control and manual balancing in medium pressure and velocity applications.

Standard Construction

Frame: 5" x  1" (127 x 25) galvanized steel hat channel with interlocking corner gusset. Equivalent to 13 gauge (2.4) channel frame. Low profile head and sill used on sizes less than 13" (330) high.

Blades: 6" x 16 gauge (152 x 1.5) galvanized steel - triple-V. Opposed action.

Axles: 1/2" (13) diameter plated steel hex.

Linkage: Concealed in frame.

Bearings: Synthetic.

Control Shaft: 1/2" x 6" (13 x 152) round drive axle with outboard shaft support bracket and bearing supplied on all single section dampers for field installation. Factory installed jackshaft supplied with all multiple section dampers: 1/2" (13) diameter for W>48" (1219) or H>72" (1829), 3/4" (19) diameter for W>96" (2438).

Minimum Size: 6" x 5" (152 x 127)

Maximum Size:
Single Section: 48" x 72" (1219 x 1829)
Multiple Sections: Unlimited

Ratings

Leakage (with seals):
8.0 cfm/ft² @ 4 in. wg. (0.04m³/s/m² @ 1.00 kPa)
4.0 cfm/ft² @ 1 in. wg. (0.02m³/s/m² @ 0.25 kPa)

Temperature: -25^oF to 180^oF (-32^oC to +83^oC)