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Order Code YR-SHUT-POSC or SOPC "Size"
Unit of Measure



N/A 6 in8 in10 in12 in14 in16 in18 in20 in22 in24 in


N/A 6 in8 in10 in12 in14 in


N/A 432 ºF222 ºC


N/A Aluminum Stainless Steel


N/A Power-Open/Spring-Close Spring-Close/Power-Open

Available as

N/A Normally Closed Normally Open



  • Heavy-duty extruded aluminum and stainless steel construction for long, corrosion-resistant life.
  • Dampers have been tested to 250,000 cycles.
  • Opposed blade damper distributes air evenly over face of grille for better control and less noise and turbulence.
  • Special windings and heavy-duty steel gearing on the factory-installed motor provide for long life and easy spring close or open operation. Cross pin drive on the motor shaft provides positive direct drive to damper without a coupling or setscrews, allowing for quick and easy motor change.
  • Unique individual nylon blade bushings for smoother and quieter operation that will withstand temperatures of 432 ºF/ 222 ºF.
  • Mounting plate provided for slip-in installation in the side of the duct.