Greenheck Fan - WD-323

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Contents

I GREENHECK WD 323 For Use With Models CW amp CWB Centrifugal Sidewall Exhaust Fans Special Purpose BACKDRAFT DAMPER Application and Design The WD 323 series is a vertically mounted backdraft damper that is designed for use with Models CW amp CWB centrifugal sidewall exhaust fans to allow horizontal airflow and prevent reverse airflow The damper is opened by air pressure differential and gravity and closed by springs Optional motor pack converts to motorized operation Standard Construction Frame 0 063 in 1 6mm extruded aluminum Blades 0 025 in 64mm roll formed aluminum Axles 3 i6 in 4 8mm diameter plated steel full length Bearings Synthetic sleeve type Linkage 0 064 in 1 6mm aluminum tie bar Spring assisted to close bl ...