Standard Construction
Frame: 4" x 1" x 0.081" (102 x 25 x 2) top/bottom and
4" x 1-1/8" x 0.081" (102 x 29 x 2) jambs, extruded aluminum channel.
Blades: 6" (152) heavy gauge, dual wall thermally insulated and broken extruded aluminum - airfoil. Opposed.
Axles: 1/2" (13) diameter plated steel hex.
Linkage: Concealed in frame.
Bearings: Synthetic.
Seals: Silicone - blade edge and jambs. Mechanically fastened.
Control Shaft: 1/2" x 6" (13 x 152) round drive axle with outboard shaft support bracket and bearing supplied for field installation. Factory installed 3/4" (19) diameter jackshaft on all multiple section dampers more than 2 sections wide.
Minimum Size: 6" x 12.5" (152 x 318)
Maximum Size:
Single Section: 60" x 72" (1524 x 1829)
Multiple Section: Unlimited
Ratings
Temperature: -70oF to 212oF (-57oC to 100oC)
Leakage Class: 1A and 1 (see table on product sheet)