QF Bleed-in Valve
QF Bleed-in Valves are used to adjust airflow to balance system by introducing ambient air. They are manufactured in 3 to 24” diameters, 22, and 20 ga. Galv. or 304SS, with an optional 18 ga. Galv., all in 11” lengths.
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Quick Fit Bleed-in Valves are used to adjust airflow to balance system by introducing ambient air.
QF Bleed-in Valves are manufactured as follows
- In 3 to 24 inch diameters, with a standard 22, and 20 gauge Galvanized or 304SS Stainless Steel, and an optional 18 gauge Galvanize, all in 11 inch lengths
- The longitudinal seam is solid laser welded for strength, to reduce leakage
- Collars are located on the exterior side of each port and considered as air flow non-directional. A raised lap seam and spot weld are used for attaching the collar to the body and no caulking is used
- All Bleed In Valves are manfactured in 11 inch lengths
- 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. |
Galvanized
ga. |
304SS
ga. |
Weight
lbs. |
# of Slots | OD
in. |
ID
in. |
Rolled Edge
nom.in. |
|---|---|---|---|---|---|---|---|
| 3 | 22 | 22 | 3.75 | 4 | 3.07 | 3.00 | 0.2 |
| 4 | 22[18] | 22[20] | 4.00 | 4 | 3.89 | 3.82 | 0.2 |
| 5 | 22[18] | 22[20] | 4.25 | 6 | 4.91 | 4.84 | 0.2 |
| 6 | 22[18] | 22[20] | 4.50 | 6 | 5.93 | 5.86 | 0.2 |
| 7 | 22[18] | 22[20] | 4.75 | 8 | 6.94 | 6.87 | 0.3 |
| 8 | 22[18] | 22[20] | 5.00 | 8 | 7.93 | 7.86 | 0.3 |
| 9 | 22[18] | 22[20] | 5.25 | 10 | 8.92 | 8.85 | 0.3 |
| 10 | 22[18] | 22[20] | 5.50 | 10 | 9.93 | 9.86 | 0.3 |
| 11 | 22[18] | 22[20] | 5.75 | 10 | 10.92 | 10.85 | 0.3 |
| 12 | 22[18] | 22[20] | 6.25 | 12 | 11.99 | 11.92 | 0.4 |
| 13 | 20[18] | 20 | 6.75 | 12 | 13.00 | 12.92 | 0.4 |
| 14 | 20[18] | 20 | 7.50 | 14 | 13.99 | 13.91 | 0.4 |
| 15 | 20[18] | 20 | 8.25 | 14 | 14.99 | 14.91 | 0.4 |
| 16 | 20[18] | 20 | 10.00 | 16 | 16.00 | 15.92 | 0.4 |
| 17 | 20[18] | 20 | 11.75 | 16 | 17.00 | 16.92 | 0.4 |
| 18 | 20[18] | 20 | 13.50 | 18 | 17.99 | 17.91 | 0.4 |
| 20 | 20[18] | 20 | 15.00 | 20 | 20.00 | 19.92 | 0.4 |
| 22 | 20[18] | 20 | 18.00 | 22 | 22.01 | 21.93 | 0.4 |
| 24 | 20[18] | 20 | 22.00 | 24 | 23.98 | 23.90 | 0.4 |
Galvanized Gauge Metal Thickness
| Gauge | Inches | Millimeters |
|---|---|---|
| 22 | 0.0366 | .85 |
| 20 | 0.0396 | 1.01 |
| 18 | 0.0516 | 1.31 |
Stainless Gauge Metal Thickness
| Gauge | Inches | Millimeters |
|---|---|---|
| 22 | 0.031 | 0.79 |
| 20 | 0.0375 | 0.95 |
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.
| Item | Material | Compliance/Rating |
|---|---|---|
| QF Bleed-In Valve | Galvanized | ASTM A653 with a G-90 Rating |
| 304 SS | Finish meets ASTM A240 | |
| 316 SS | Finish meets ASTM A240 |