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ALUMINUM SPRING BKDRFT DAMPER, FOR 28 IN FAN, FOR 28 IN NOMINAL DUCT DIA, SINGLE PANEL

ALUMINUM SPRING BKDRFT DAMPER, FOR 28 IN FAN, FOR 28 IN NOMINAL DUCT DIA, SINGLE PANEL

DAYTON

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Available only while supplies last. Quantities may be limited. The Item is FINAL SALE.
ALUMINUM SPRING BKDRFT DAMPER, FOR 28 IN FAN, FOR 28 IN NOMINAL DUCT DIA, SINGLE PANEL

ALUMINUM SPRING BKDRFT DAMPER, FOR 28 IN FAN, FOR 28 IN NOMINAL DUCT DIA, SINGLE PANEL

DAYTON

Web Price If you have a User ID, sign in to view your account pricing. Your price may be different from the price displayed. : $110.92 / EACH

EHC: EHC :

Compliance and Restrictions

  • None

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https://catalogue.grainger.ca/?hybris=true
  • Item # WWG3HHL7
  • Mfr. Model # 3HHL7
  • UNSPSC # 40101504
  • CATALOGUE PAGE # 1859
  • Shipping Weight 7.4 lbs

Product Details

This 411 series manual damper includes pre-punched conduit hole knock-out, felted edges for quiet operation, is made of galvanized steel, and it measures 27¾ inch width, 27¾ inch height, 4½ inch length. This manual damper is ceiling/wall mountable.

Technical Specs

  • ItemManual Damper
  • For Nominal Duct Diameter28 in
  • Number of Panels1
  • Overall Height27 3/4 in
  • Rough Opening ShapeSquare
  • For Duct ShapeSquare
  • Overall Width27 3/4 in
  • Overall Length4 1/2 in
  • Rough Opening Length28 in
  • Rough Opening Width28 in
  • Damper TypeDynamic
  • Blade TypeFlat Blade
  • Closure TypeSpring
  • Closure Velocity Rating2,000 fpm
  • Switch ActionNormally Closed
  • IncludesPre-Punched Conduit Hole Knock-Out, Felted Edges for Quiet Operation
  • Flange TypeNone
  • Airflow DirectionHorizontal, Vertical
  • Series411
  • Bushing MaterialNylon
  • Damper FinishMill Finish
  • Damper Application Backdraft
  • Frame Material Galvanized Steel
  • Maximum Air Velocity 2,000 fpm
  • Rough Opening Diameter 28 in
  • Fits Fan Diameter 28 in
  • Free Area 4.9 sq ft
  • Frame Material Thickness 20 ga
  • Frame Depth 2 in
  • Maximum Pressure 1 in wc
  • Blade Material Aluminum
  • Single Acting/Double Acting Single Acting
  • Maximum Ambient Temperature 180 Degrees F
  • Blade Orientation Parallel Blades
  • Frame Less Flange 27.75 sq in
  • Counterbalanced Not Counterbalanced
  • Mounting Location Ceiling, Wall
  • Blade Seal Material Felt
  • Opening Type Motorized
  • Mounting Position Horizontal, Vertical
  • Blade Material Thickness 26 ga
  • Minimum Ambient Temperature -40 Degrees F
  • Country of Origin United States (subject to change)

Compliance and Restrictions

  • None

SDS Document Not Found

For assistance please contact the SDS Coordinator by email at productcompliance@grainger.ca

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