SKC-C Series Constant Air Volume Dampers For Circular Duct greatly facilitate the balancing of ventilation systems. Those dampers maintain constant air volume at varying pressures caused by connection and disconnection of system parts, clogging of filters and ducts, wind effects, window opening, etc.
SKC-C is a self-adjustable damper, independent of external energy sources. It is preset by the installer to maintain a specific air volume in cfm or m3/h. The damper will then auto-adjust itself to maintain the desired volume of air while performing within a pressure range between 0.2 and 4 in.w.g. (between 50 and 1,000 Pa).
Adjustment is based on the balance of forces on the blade between the air pressure and the reactive forces that exert a spring and an inflatable damper.
The adjustment knob has a graduated rate scale allowing for quick and easy adjustment of the desired air flow. It is located on the outside of the damper, making it easier to adjust the air volume after installation.