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Triangle brand Optional Back Draft Damper for Agricultural Exhuast Fans (Bolt On)
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IWS SERIES AUTOMATIC SHUTTERS

◆ May be used with belt or direct drive fans
◆ Opens automatically when fan is turned on and closes when air flow stops
◆ Frames are heavy-gauge galvanized steel with powder coat finish
◆ Extruded aluminum shutter blades attach with bronze bushings and steel fasteners.
     This eliminates rust and corrosion, permitting continuous, smooth operation without lubrication
◆ Available for all PFG fans, Standard on SLW series fans
 
 
INDUSTRIAL WALL SHUTTERS
Model No. For Fan Size Outside Dimension Inside Dimension Depth Ship Wt.
IWS 36 36" 42⅜ X 42⅜ 40" X 40" 4" 39
IWS 42 42" 48⅜ X 48⅜ 46" X 46" 4" 44
IWS 45 48" 51⅜ X 51⅜ 49" X 49" 4" 49


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