QF Transition Rectangular to Round

Transitions Rectangle to Round are for transitioning round ductwork to rectangular ductwork, or can be used as a hood.
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Quick Fit Transitions Rectangle to Round are for transitioning round ductwork to rectangular ductwork, or can be used as a hood.

Transitions Rectangle to Round are manufactured as follows:

  • Using standard duty gauge galvanized or stainless-steel metal
  • Standard length is equal to the B side dimension of the rectangle. Length must be at least 75% of B or it will be Square to Square
  • Round ends (D) come in diameters sizes of 3 to 24 inches. Diameters of more than 24 inches come standard with Angle Flanged ends
  • Rectangle ends come with Flanged ends
NOTES:
  1. At temperatures ranging between 390° F and 480° F, the zinc-iron alloy layers in the galvanized steel will continue to provide a high level of protection from corrosion. However, there may be some peeling, changes in mechanical properties, and reduction in the corrosion protection. Recommended maximum service temperature is 390° F.
  2. For 304 SS metal, bluing may occur at temperatures of 800° F and above.
  3. Rock River Silicone Sealant and Red Devil HVAC/R High Temperature Silicone Sealant are not able to be painted.
Item Material Compliance/Rating
QF Transition Rectangular to Round Galvanized ASTM A653 with a G-90 Rating
304 SS Finish meets ASTM A240
316 SS Finish meets ASTM A240
3M Scotch Seal Metal Sealant 2084 Acetone blend AAMA Specification 801.1
Rock River Silicone Sealant 100% Silicone ASTM C920 Class 25
TT-S-00230C Class A and TT-S-001543A
FDA No. 421 CFR 117.2600, conforms to FDA requirements
Red Devil HVAC/R High Temperature Silicone Sealant Silicone ASTM C920 Class 25
TT-S-00230C Class A and TT-S-001543A
CEBTP 432.6 140-2
Mil Spec 46106A
CGSB 19C9-9B
DIN 18540 Part 2
OREX 150031-2
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