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Install Types for aluminum control dampers.

Square-to-Round
transition

Square to Round transition damper

MINIMUM DUCT DIAMETER:
4” (102 mm)


MAXIMUM DUCT DIAMETER:
58” (1474 mm)


MAXIMUM SECTION SIZE
25 ft² (2.3 m²)


MAXIMUM FINISHED OD:
62”w x 62”h (1575 mm x 1575 mm)

  • Transition pieces are a minimum of 18 ga. galvanized steel, when dampers are ordered as standard or with ET, SC, or ECT Options.
  • Transition pieces are 304 stainless steel, when dampers are ordered with MR or SW Options.
  • Sealant must be used between transition pieces and damper flanges.
  • Dampers are built 4" (102 mm) larger than specified duct diameter. (Dampers are fabricated square.)
  • Finished transition diameter is ¼" (6.35 mm) less than specified duct diameter, providing clearance for mating duct which slides over round transition. This ensures free movement of damper blades.
  • Always provide duct diameter dimension when ordering.

TAMCO Square to Round Install Type for Control Dampers