The Model FGS is a FIBERGLASS rear flanged vertical mount automatic exhaust shutter for areas where corrosion is a known problem. It is designed to allow horizontal airflow in one direction and to prevent reverse airflow while providing protection from environmental elements when the airflow stops. The blades open with airflow and close by gravity when the fan shuts down. Ideal for direct-drive or belt-driven exhaust fans. Do not use with vane axial or tube axial fans.
Frame: 3" deep x 1-1/2" flanged Fiberglass pultrusion with integrated weather stripping for strength and weather protection.
Blades: Fiberglass pultrusion.
Tie Rod: Center mounted Stainless Steel for uniform opening and closing.
Bushings: 304 Stainless Steel screws, pins, rivets, and bushings.
Mounting holes: 9/32" x 1/2" slotted.
Sizes (see chart on submittal dwg. for std. sizes):
Minimum: 10" W x 10" H
Maximum: 60" W x 60" H
2500 FPM Maximum Velocity.
1" wg Maximum Pressure.
180 degree Maximum Temperature.
Motor pack (Model MTR-556 or MTR-885 - see submittal dwg.)
Gusset plate (up to 24") attached to the back of the shutter.
Manual pull chain operator.
Custom sizes available in whole inch increments.
We recommend mounting the shutter at least 1/3 the fan diameter away from the fan blade.