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Retrozone and Flexdamper are trademarks of Retrozone inc.

 Free Standard Shipping on Orders $25+ Continental USA only

  Shipping to Alaska, Hawaii, and International shipping to Canada extra. Please place the order and factory will advise of additional shipping amounts prior to shipping. 

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Expedited shipping available. Please call for pricing. 

 Round Dampers no Motor


Available Sizes: 3” to 10", 12", 14", 16", and 18" diameter

Have your own motors? 


Retrozone Round Dampers are available with no motors installed.  Whether you want to add motors later, or have your own motors,  now you can have our best-in-industry damper cans for your installation. These dampers feature the finest construction and parts in the industry, and will not crack, come apart, have blades fall off or leak through seams like lesser quality dampers.


Many accessories are available under “Damper Accessories” including manual adjustment handles!


Check these features: 


*Heavy 22 gauge construction with 18 gauge blades. 

*Welded, leak proof seams-not riveted. 

*Durodyne commercial 1/2 inch drive shafts 

*Durodyne Bronze Bearings with anti rattle washers

*Bolted on blades with 3/16 hardware-Blades will not vibrate off!




Specifications: 


3 inch damper is 5.5 inches long with 4 inch long drive shaft


Dampers  4 to 12 inches in diameter = 9 inches long

Dampers 14 to 18 inches in diameter = 12 inches long 

Features offset shafts allowing room for most motors


Need an anti-rotation bracket (often supplied with new motors)? Available under Damper accessories. 

Includes pre-cut urethane blade seals; shipped loose


Standard 1/2 inch commercial drive shaft is 2 inches long. 

Optional 3 1/2 inch drive shaft is  3.5 inches long

Optional locking quadrant handle can be added for manual balancing dampers.

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