Round Opposed Blade Sealed Damper
This damper design is similar to the non-sealed style damper. To keep leakage to a minimum we have installed spring Stainless Steel in the side jambs and seal the blades with BES vinyl blade seals.


Other materials include:
Stainless Steel or Aluminum with some S.S. Hardware


Options:
Nylon Bearings
Sleeves
Quadrants-Galvanized or Stainless Steel
Electric Actuators

See Spec Sheet (pdf format)