Standard Toothed (geared) wheel volume control damper is the toothed wheels instead of the conventional linkage mechanism to operate the blades. The advantages of toothed wheel over the linkage mechanism is limited not only with the neat appearance it provides but also the more free area achieved by placing the gears outside the air stream.
Extruded Aerofoil type aluminium blades while allowing a laminar flow across the blade depth also prevent the air from producing turbulence. Thus pressure exerted by the air on duct wall due to turbulence is considerably reduced.
Manufacturing Process
Frames and blades of toothed volume control damper are extruded aluminium alloy and are mill finished
Concealed gear train n high grade nylon construction
The frame and blade have a typical wall thickness of 1/16” (16 gauge) and 1/21” (18 gauge) respectively
