QF Branch

Quick-Fit Duct Branches, also known as wyes or laterals are added typically to accommodate an additional line or lines into the main one. Quick-Fit Branches are standard 30° with a 45° option. QF branches come in galvanized or 304SS metal.
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Quick-Fit Duct Branches, also known as wyes or laterals are added typically to accommodate an additional line or lines into the main one. Quick-Fit Branches are standard 30° with a 45° option.

QF Branches are manufactured as follows:

  • In galvanized or stainless-steel metal up to 24 inches in Diameter with standard 20 to 22 gauge and an optional 18 gauge. Galvanized only also has an optional 16 gauge
  • The Longitudinal seam is tapped, spot welded, and caulked
  • They are laser welded with QF rolled ends, which allows for quick connections to other QF components
  • Collars are located on the exterior side of each port of which are considered as air flow non-directional and have a laser welded longitudinal seam
  • A raised lap seam and spot weld are used for attaching the collar to the body and no caulking is used
  • Diameters can surpass 24 inches, though only with Flanged ends and a manufactured Galvanized standard 18 gauge with an optional 16 gauge or a standard 18 gauge Stainless Steel metal

Branches with 12 or 14 gauge galvanized metal are available in the XD product line.

  • In Sizes 25 inches and larger, Branches are manufactured with Angle Flange (ANGFL) ends instead of Rolled Edge ends.
  • Standard QF ends can be changed to Raw with a defined ID dimension (RawID), Raw with a defined OD dimension (RawOD), No Fitting or just a raw end (NoFit), Flexible hose adapter (RawFlex), Flat Flange (FFL), Angle Flange (ANGFL), or Van Stone (VanStone).
Size (A dim)
in.
Galvanized
ga.
304SS
ga.
Approx. Weight
lbs.
OD
in.
ID
in.
Rolled Edge
nom. in.
3 22 22 2.32 3.07 3.00 0.2
4 22[18] 22 3.00 3.89 3.82 0.2
5 22[18] 22 3.75 4.91 4.84 0.2
6 22[18] 22 4.25 5.93 5.86 0.3
7 22[18] 22[18] 5.00 6.94 6.87 0.3
8 22[18,16] 22[18] 6.00 7.93 7.86 0.3
9 22[18,16] 22[18] 7.25 8.92 8.85 0.3
10 22[18,16] 22[18] 8.50 9.93 9.86 0.3
11 22[18,16] 22[18] 9.25 10.92 10.85 0.3
12 22[18,16] 22[18] 10.75 11.99 11.92 0.4
13 20[18,16] 20[18] 11.40 13.00 12.92 0.4
14 20[18,16] 20[18] 13.50 13.99 13.91 0.4
15 20[18,16] 20[18] 15.60 14.99 14.91 0.4
16 20[18,16] 20[18] 17.56 16.00 15.92 0.4
17 20[18,16] 20[18] 19.00 17.00 16.92 0.4
18 20[18,16] 20[18] 21.00 17.99 17.91 0.4
19 20[18,16] 20[18] 25.00 19.05 18.93 0.4
20 20[18,16] 20[18] 30.00 20.00 19.92 0.4
21 20[18,16] 20[18] 35.00 21.02 20.94 0.4
22 20[18,16] 20[18] 39.50 22.01 21.93 0.4
23 20[18,16] 20[18] 47.00 23.01 22.93 0.4
24 20[18,16] 20[18] 53.50 23.98 23.90 0.4
25 18[16] 18 63.00 N/A N/A ANGFL
26 18[16] 18 74.00 26.07 25.94 ANGFL
27 18[16] 18 81.00 N/A N/A ANGFL
28 18[16] 18 98.00 28.07 27.94 ANGFL
29 18[16] 18 107.00 N/A N/A ANGFL
30 18[16] 18 117.05 30.06 29.94 ANGFL
31 18[16] 18 121.00 N/A N/A ANGFL
32 18[16] 18 125.94 32.06 31.94 ANGFL
33 18[16] 18 130.00 N/A N/A ANGFL
34 18[16] 18 134.83 33.93 33.06 ANGFL
35 18[16] 18 138.00 N/A N/A ANGFL
36 18[16] 18 142.78 36.06 35.93 ANGFL
37 18[16] 18 148.00 N/A N/A ANGFL
38 18[16] 18 153.47 38.08 37.94 ANGFL
39 18[16] 18 158.00 N/A N/A ANGFL
40 18[16] 18 162.81 40.08 39.94 ANGFL
Galvanized Gauge Metal Thickness
Gauge Inches Millimeters
22 0.0366 0.85
20 0.0396 1.01
18 0.0516 1.31
16 0.0635 1.61
Stainless Gauge Metal Thickness
Gauge Inches Millimeters
22 0.031 0.79
20 0.0375 0.95
18 0.048 1.23
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 Branch 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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