De Dietrich 83681532 Flue damper 12 sections

This is a flue damper with 12 sections, catalogue article 336.274.001, manufacturer code 83681532, from De Dietrich. It belongs to the flues and air ducts category. Parts of this type are installed in the flue gas path between the boiler and the chimney. Their primary function is to control the flow of combustion products: they can be used to regulate draft or to close off the flue automatically when the burner is off, reducing standby heat loss. The 12 sections likely refer to a multi-blade or multi-segment design that provides a larger sealing area or allows for variable opening, but the exact arrangement depends on the specific construction. When selecting a flue damper, key parameters include the flue diameter, the operating temperature class (to withstand flue gas temperatures), the sealing method, and whether the damper is manual or motor‑actuated. In room‑sealed or condensing systems, the damper must also be compatible with the condensate drainage route and should not obstruct the necessary siphon seal. During replacement, ensure the damper’s mounting flange matches the existing flue connection, and verify that any actuator (if present) works with the burner control voltage. A faulty damper that fails to open or close fully can cause flue gas spillage, poor combustion, or increased heat loss, so proper sizing and seal integrity are essential.