Fantech

RSK 4 Backdraft Damper

4" Back-draft damper for circular duct, single

Item #: 411112

• Designed for circular ducts
• Made from galvanized sheet metal for corrosion resistance
• Spring-loaded butterfly blades ensures one-direction flow
• Damper blades formed from aluminum H14
• Stainless steel torsion spring
• 24 GA, G90 galvanized steel casing
• EPBM synthetic rubber gasket
• 3/32” diameter brass central rod

Technical parameters

Dimensions and weights
Weight 0.6 lb
Images Performance - RSK 4 Backdraft Damper - Fantech
Model Dia. Length

RSK 4

4

3 1/4

RSK 5

5

3 1/8

RSK 6

6

3 1/8

RSK 8

8

3 1/8

RSK 10

10

3

RSK 12

12

3

Dimensions are in inches.