QF Duct Clamp
QF Clamps are used as an easy and quick way to connect QF Pipe and other QF fittings together. Clamps come with an internal seal and a cotter pin to lock the clamp in the closed position. Clamps are made from galvanized or 304SS, and come with nitrile seals (silicone and ePTFE optional).
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Quick Fit (QF) Clamp is a quick and easy way to connect QF Pipe and other QF fittings together. The standard clamps come with a Nitrile (buna-n) seal. QF Clamps with silicone and ePTFE seals are available in applications where nitrile seals are unacceptable. QF Clamps are also supplied with a cotter pin to lock the clamp in the closed position.
QF Clamps are manufactured as follows:
- In Galvanized or 304SS Stainless Steel with like material for the cotter pins
- 3 to 6 inches diameters come with a small cotter pin and a 3/8 inch wide Nitrile Seal
- 7 to 12 inches diameters come with a large cotter pin and a 1/2 inch wide Nitrile Seal
- 12 to 24 inches diameters come with a large cotter pin and a 5/8 inch wide Nitrile Seal
| Size in. |
Galvanized ga. |
304SS ga. |
Weight lbs. |
||||
|---|---|---|---|---|---|---|---|
| 3 | 20 | 22 | 0.26 | ||||
| 4 | 20 | 22 | 0.28 | ||||
| 5 | 20 | 22 | 0.31 | ||||
| 6 | 20 | 22 | 0.33 | ||||
| 7 | 18 | 20 | 0.54 | ||||
| 8 | 18 | 20 | 0.59 | ||||
| 9 | 18 | 20 | 0.63 | ||||
| 10 | 18 | 20 | 0.68 | ||||
| 11 | 18 | 20 | 0.70 | ||||
| 12 | 16 | 18 | 1.32 | ||||
| 13 | 16 | 18 | 1.38 | ||||
| 14 | 16 | 18 | 1.48 | ||||
| 15 | 16 | 18 | 1.53 | ||||
| 16 | 16 | 18 | 1.60 | ||||
| 17 | 16 | 18 | 1.67 | ||||
| 18 | 16 | 18 | 1.77 | ||||
| 19 | 16 | 18 | 1.85 | ||||
| 20 | 16 | 18 | 1.92 | ||||
| 21 | 16 | 18 | 1.95 | ||||
| 22 | 16 | 18 | 2.04 | ||||
| 23 | 16 | 18 | 2.10 | ||||
| 24 | 16 | 18 | 2.20 | ||||
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 Clamp | Galvanized | ASTM A653 with a G-90 Rating |
| 304 SS | Finish meets ASTM 240 | |
| Gaskets | Nitrile | ASTM D1056 2B2 |