The Model 304SS is a STAINLESS STEEL rear flanged vertical mount automatic exhaust shutter. 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: 2" deep x 1-1/2" flange x .039 min. gauge 304 Stainless Steel with integrated weather stripping for strength and weather protection.
Blades: .016 gauge 304 Stainless Steel with a S.S. reinforcement rod for added strength.
Tie Rod: Center mounted Stainless Steel for uniform opening and closing.
Bushings: 304 Stainless Steel rods, 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: 36" W x 36" H
2500 FPM Maximum Velocity.
1" wg Maximum Pressure.
180 degree Maximum Temperature.
Custom sizes available in whole inch increments.
We recommend mounting the shutter at least 1/3 the fan diameter away from the fan blade.