QF T-Branch
QF T-Branches are added to accommodate an additional line which goes into the main one at a 90° angle. T-Branches are manufactured with QF rolled ends and come in galvanized or 304SS metal. T-Branches over 24 inches come in Flanged only.
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Quick-Fit Duct T-Branches, are added to accommodate an additional line which goes into the main one at a 90° angle. T’s are more commonly used in positive systems where the air is being pushed.
QF T-Branches are manufactured as follows:
- In galvanized or stainless-steel metal up to 24 inches with a standard 20 to 22 gauge and an optional 18 gauge. Galvanized only also have an optional 16 gauge
- 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, 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:
- 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.
- For 304 SS metal, bluing may occur at temperatures of 800° F and above.
- Rock River Silicone Sealant and Red Devil HVAC/R High Temperature Silicone Sealant are not able to be painted.
| Item | Material | Compliance/Rating |
|---|---|---|
| QF T-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 |