Back Draft Dampers

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  • Designed to automatically prevent air recirculation in fans.  Includes blade and perimeter seals for low leakage when closed. Completely stops fan wheel rotation.
  • Near zero system effect over a wide range of operation. Gravity style backdraft dampers typically add 0.5 to 1.0 inches pressure drop to the fan at comparable air flow rates.
  • Blades rotate on sealed bearings and align with the local slipstream for near zero loss in fan performance.
  • Fits a wide range of fan sizes and types from 10 to 60 inches.
  • Static pressures up 12 inches w.g.
  • Can use custom adaptors to fit any fan inlet or duct configuration.
  • Mounts with 4 connection points.
  • 6063-T5 Aluminum frame and blade construction, mill finish is the standard, 304 stainless steel joiners, Santoprene blade seals, HDPE plastic bearing seats, sealed bearings.