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PRESSURE RELIEF DAMPERS

Rectangular Pressure Relief Dampers (DD Series)

Rectangular Pressure Relief Damper (DD Series)

DuroZone Pressure Relief Dampers are used to relieve duct systems of pressure build up created as zones are satisfied and zone dampers travel to a closed position. The DuroZone Pressure Relief Dampers do this in a simple and reliable fashion; based on barometric/static pressure in the duct system.

A weighted arm is attached to a damper blade. This weight is set to keep the damper closed when the system is off or all zones are calling. When pressure builds up in the duct system due to satisfied zones, the pressure opens the damper blade and "bypasses" to an unconditioned area or back to the return air duct.

DuroZone Pressure Relief Dampers are available in both rectangular and round configurations.

  • Plated Steel Counterbalance Rod and Weight
  • Sintered Bronze Oil Impregnated Bushings
  • Thumb Screws For Easy Adjustment
  • Extruded Aluminum Frame
  • Aluminum Blade
  • Hardware and Brackets For Either Flush or In Line Mounting
Rectangular Pressure Relief Dampers
Item No. Description and Dimensions (Width x Height) Bypass @ 1200 fpm
35063

DD 12" x 8" 

 700 CFM
35064

DD 18" x 8" 

 1100 CFM
35068 DD 20" x 10" 1600 CFM
35069 DD 20" x 12" 1900 CFM
 
Round Pressure Relief Dampers (DDRD Series)

Round Pressure Relief Damper (DDRD Series)
  • Plated Steel Counterbalance Rod and Weight
  • Sintered Bronze Oil Impregnated Bushings
  • Thumb Screws For Easy Adjustment
  • Galvanized Steel Construction
  • Ability to Mount Counterbalance Rod on Either Side
 
Round Pressure Relief Dampers
Item No. Description and Diameter (In Inches) Bypass @ 1200 fpm
35070 DDRD- 8 400 CFM
35071 DDRD-10 650 CFM
35072 DDRD-12 950 CFM
35073 DDRD-14 1300 CFM
35074 DDRD-16 1700 CFM

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