Standard Construction
Frames: 8" x 2" x 14 ga (203 x 51 x 2) galvanized steel channel.
Blades: 0.080" (2) thick extruded aluminum airfoil. Parallel action.
Axles: 3/4" (19) diameter plated steel.
Linkage: 3/16" x 3/4" (4.7 x 19) plated steel tie bars and 3/8" (10) stainless steel pins concealed in frame.
Bearings: Stainless steel sleeve bearing, press fit into frame.
Control Shaft: 3/4" x 10 (19 x 254) round drive shaft with shaft support bracket and bearing mouned to damper frame with factory mounted/welded manual locking quadrant.
Lifting Lugs: 7/8" (22) diameter, one on each jamb of frame.
Minimum Size: 8" x 10" (203 x 254)
Maximum Size:
Single Section: 60" x 96" (1524 x 2438)
Multiple Sections: Unlimited
Ratings
-40oF to 450oF (-40oC to 232oC)
-40oF to 400oF (-40oC to 204oC) Low Leakage Seals