QF Reducer

QF Reducers provide easy transition from one size of duct pipe or fitting to a smaller size. They are manufactured in 3 to 40" diameters with galvanized or 304SS metal.
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Quick Fit Reducers provide easy transition from one size of duct pipe or fitting to a smaller size.

QF Reducers are manufactured as follows:

  • In Diameter sizes of 3 to 24 inches with a standard 22 and 20 or optional 18 and 16 gauge Galvanized, also with a standard 22 and 20 or an optional 18 gauge 304SS Stainless Steel metal. Ends come Standard QF (Rolled Edge)
  • Diameter sizes of 25 to 40 inches are available with a standard 18 or optional 18 gauge Galvanized, also with a standard 18 gauge 304SS Stainless Steel metal
  • Longitudinal seam is lapped, spot welded and caulked
  • Collars have a solid laser welded longitudinal seam

Reducers in thicker gauged Galvanized metal are available in the XD line.

  • Length in inches = A-B+6 for Reducers with QF or RAW ends with a 7 inch minimum.
  • Length in inches = A-B+8 for Reducers with (ANGFL) or (FFL) ends with a 9 inch minimum.
  • Sizes larger then 24 inches come with Angle Flanged Ends (ANGFL)
  • 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.
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 0.2
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 0.3
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 96.00 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 0.0500 1.270
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 304SS 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 Reducer Galvanized ASTM A653 with a G-90 Rating
304SS 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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