QF Elbow
Standard QF and Long Radius Elbows are available in standard bend angles of 90°, 60°, 45°, and 30° bends. Elbows from 3 to 7 inches in diameter are press formed; elbows greater than 8-inch diameter are segmented elbows. QF Elbows come in galvanized and 304SS.
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Quick-Fit ducting elbows, also known as bends or bend segments, are used to change the airflow direction in lines of ductwork. Standard QF and Long Radius elbows are available in bend angles of 90°, 60°, 45°, and 30°.
QF Elbows are manufactured as follows:
- In galvanized or 304 stainless steel, and standard metal thickness is 20 to 24-gauge
- 3 to 7-inch diameters are press formed, having formed halves stitch-welded together along with rolled ends, and have a bend radius of 1.0 Center Line Radius (CLR)
- 8-inch diameter and larger are gored as segmented elbows with a lock form standing seam every 15 degrees, and have a bend radius of 1.5CLR.
- 3 to 6-inch diameters in Stainless Steel are tubed
- Custom bend radii are available from 0.75CLR to 3.5CLR
- Ends come Standard QF and can be changed to Raw ID (RAWID), Raw OD (RAWOD), No Fitting (NF), Hose Adapter (RAWFLEX), Flat Flange (FFL), Angle Flange (ANGFL), or Van Stone (VANSTONE)
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 in. |
CLR Std. |
Galvanized | 304 SS | Weight (lbs.) | OD in. |
ID in. |
Rolled Edge nom. in. |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ga. | Style | Tangent (in.) | ga. | Style | Tangent (in.) | 30° | 45° | 60° | 90° | |||||
| 3 | 1 | 24 | P | 2.00 | 14 | T | 2 | 0.38 | 0.90 | 0.65 | 0.90 | 3.07 | 3.00 | 0.2 |
| 4 | 1 | 24 | P | 1.32 | 14 | T | 2 | 0.45 | 1.00 | 0.80 | 1.00 | 3.89 | 3.82 | 0.2 |
| 5 | 1 | 24 | P | 1.32 | 14 | T | 2 | 0.65 | 0.70 | 1.15 | 1.20 | 4.91 | 4.84 | 0.2 |
| 6 | 1 | 24 | P | 1.32 | 14 | T | 2 | 0.85 | 1.05 | 1.35 | 1.50 | 5.93 | 5.86 | 0.2 |
| 7 | 1 | 24 | P | 1.32 | 22 | S | 2 | 1.20 | 1.30 | 1.65 | 2.20 | 6.94 | 6.87 | 0.2 |
| 8 | 1.5 | 22[18] | S | 2.00 | 22 | S | 2 | 2.80 | 3.70 | 4.40 | 6.10 | 7.93 | 7.86 | 0.3 |
| 9 | 1.5 | 22[18] | S | 2.00 | 22 | S | 2 | 3.60 | 4.80 | 5.50 | 7.60 | 8.92 | 8.85 | 0.3 |
| 10 | 1.5 | 22[18] | S | 2.00 | 22 | S | 2 | 4.30 | 5.31 | 6.70 | 9.00 | 9.93 | 9.86 | 0.3 |
| 11 | 1.5 | 22[18] | S | 2.00 | 22 | S | 2 | 4.75 | 6.05 | 7.50 | 10.50 | 10.92 | 10.85 | 0.3 |
| 12 | 1.5 | 22[18] | S | 2.00 | 22 | S | 2 | 5.55 | 7.30 | 8.96 | 12.40 | 11.99 | 11.92 | 0.3 |
| 13 | 1.5 | 20[18] | S | 2.00 | 20 | S | 2 | 7.10 | 9.25 | 12.25 | 14.26 | 13.00 | 12.92 | 0.4 |
| 14 | 1.5 | 20[18] | S | 2.00 | 20 | S | 2 | 8.53 | 11.48 | 13.70 | 19.00 | 13.99 | 13.91 | 0.4 |
| 15 | 1.5 | 20[18] | S | 2.00 | 20 | S | 2 | 9.00 | 12.06 | 16.00 | 21.25 | 14.99 | 14.91 | 0.4 |
| 16 | 1.5 | 20[18] | S | 2.00 | 20 | S | 2 | 10.30 | 13.80 | 18.83 | 24.00 | 16.00 | 15.92 | 0.4 |
| 17 | 1.5 | 20[18] | S | 2.00 | 20 | S | 2 | 11.07 | 15.25 | 19.20 | 27.50 | 17.00 | 16.92 | 0.4 |
| 18 | 1.5 | 20[18] | S | 2.00 | 20 | S | 2 | 12.14 | 17.80 | 20.81 | 30.90 | 17.99 | 17.91 | 0.4 |
| 20 | 1.5 | 20[18] | S | 2.00 | 20 | S | 2 | 14.73 | 20.04 | 25.35 | 35.97 | 20.00 | 19.92 | 0.4 |
| 22 | 1.5 | 20[18] | S | 2.00 | 20 | S | 2 | 17.90 | 23.90 | 30.28 | 43.06 | 22.01 | 21.93 | 0.4 |
| 24 | 1.5 | 20[18] | S | 2.00 | 20 | S | 2 | 22.70 | 28.00 | 42.50 | 55.50 | 23.98 | 23.90 | 0.4 |
Galvanized Gauge Metal Thickness
| Gauge | Inches | Millimeters |
|---|---|---|
| 24 | 0.0276 | 0.70 |
| 22 | 0.0366 | 0.85 |
| 20 | 0.0396 | 1.01 |
| 18 | 0.0516 | 1.31 |
Stainless Gauge Metal Thickness
| Gauge | Inches | Millimeters |
|---|---|---|
| 22 | 0.0310 | 0.79 |
| 20 | 0.0375 | 0.95 |
| 14 | 0.0781 | 1.98 |
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 Elbow | 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 |