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Zero- Length Reducer Flanges (Standard)

Adapt two different-size knife-edge flanges that need to be bolted together.

Reducer Flange Features:

  • All small flanges have blind tapped bolt holes — most large flanges have through-holes (where the two flanges have similar diameters, both are tapped)
  • Part numbers ending with the letter "T" represent double-tapped flanges
ISO Standard KJLC flanges & gaskets are compatible with ISO3669-2017, but more importantly are compliant to the stricter requirements of E2734/E2734M – 10.

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Ordering Table

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 Notes: 
1.
Due to space constraints, it is recommended to use the Twelve point bolt set (Part: TBS31224225).
Flange Selection Guide
With a variety of flanges to choose from, the Flange Selection Guide is designed to help you find one to meet your vacuum requirements. Shop Now!
Can't find the flange you need or want a custom configuration? Please call us at +1 412 387 9200 or email international@lesker.com with your inquiry.

Accessories Table

Description For Per Package Manual
VacuCADSM
Part Number Price In Stock Add Item
Description For Per Package Manual
VacuCADSM
Part Number Price In Stock Add Item
Gasket, Copper, DN16CF (1.33" OD) Flange , 0.837" OD, 0.640" ID, (10) Per Package All 1-1/3" (DN16CF) Flanges 10
(please log in)
GA-0133
$21.05 In Stock
Gasket, Copper, DN25 (2.125" OD) Flange, 1.291" OD, 1.010" ID, (10) Per Package All 2-1/8" (DN25CF) Flanges 10
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GA-0212
$24.05 In Stock
Gasket, Copper, DN35CF-DN40CF (2.75" OD) Flange, 1.895" OD, 1.451" ID, (10) Per Package All 2-3/4" (DN35-DN40CF) Flanges 10
(please log in)
GA-0275
$27.35 In Stock
Gasket, Copper, DN35CF-DN40CF (2.75" OD) Flange, Large Bore, 1.895" OD, 1.528" ID, (10) Per Package All 2-3/4" (DN35-DN40CF) Flanges 10
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GA-0275LB
$27.35 In Stock
Gasket, Copper, DN50CF (3.375" OD) Flange, 2.425" OD, 2.010" ID, (10) Per Package All 3-3/8" (DN50CF) Flanges 10
(please log in)
GA-0337
$31.10 In Stock
Gasket, Copper, DN63CF (4.50" OD) Flange, 3.243" OD, 2.506" ID, (10) Per Package All 4-1/2" (DN63CF) Flanges 10
(please log in)
GA-0450
$37.20 In Stock
Gasket, Copper, DN75CF (4.625" OD) Flange, 3.598" OD x 3.010" ID, (10) Per Package All 4-5/8" (DN75CF) Flanges 10
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GA-0462
$44.25 In Stock
Gasket, Copper, DN100CF (6.00" OD) Flange, 4.743" OD,4.006" ID, (10) Per Package All 6" (DN100CF) Flanges 10
(please log in)
GA-0600
$55.30 In Stock
Gasket, Copper, DN125CF (6.75" OD) Flange, 5.567" OD x 5.010" ID, (10) Per Package All 6-3/4" (DN125CF) Flanges 10
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GA-0675
$66.35 In Stock
Gasket, Copper, DN160CF (8.00" OD) Flange, 6.743" OD, 6.007" ID, (10) Per Package All 8" (DN160CF) Flanges 10
(please log in)
GA-0800
$78.40 In Stock
Gasket, Copper, DN200CF (10.00" OD) Flange, 8.743" OD, 8.007" ID, (10) Per Package All 10" (DN200CF) Flanges 10
(please log in)
GA-1000
$96.50 In Stock
Gasket, Copper, DN250CF (12.00" OD) Flange, 10.743" OD x 10.007" ID, (1) Per Package All 12"(DN250) CF Flanges 1
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GA-1200
$61.35 In Stock
Gasket, Copper, DN275CF (13.25" OD) Flange, 11.590" OD, 10.845" ID, (1) Per Package All 13-1/4" CF Flanges 1
(please log in)
GA-1325
$54.30 In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 1/4-28 x 1.38" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 2-3/4" (DN35-DN40CF) Larger CF Flange 25
(please log in)
HBS25028138
$30.50 In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 1.75" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 3-3/8" (DN50CF) Larger CF Flange 25
(please log in)
HBS31224175
$39.20 In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.00" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 4-1/2" (DN63CF) Larger CF Flange 25
(please log in)
HBS31224200
$33.20 In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.00" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 4-5/8" (DN75CF) Larger CF Flange 25
(please log in)
HBS31224200
$33.20 In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 6" (DN100CF) Larger CF Flange 25
(please log in)
HBS31224225
$39.20 In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 6-3/4" (DN125CF) Larger CF Flange 25
(please log in)
HBS31224225
$39.20 In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 8" (DN160CF) Larger CF Flange 25
(please log in)
HBS31224225
$39.20 In Stock
Hex,bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.50" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 10" (DN200CF) Larger CF Flange 32
(please log in)
HBS31224250
$30.05 In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 3.00" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 13-1/4" Larger CF Flange 25
N/A
HBS31224300
$50.25 In Stock
Socket Head Cap Screws, Stainless Steel, (25) 8-32 x 0.50" Long Socket Head Cap Screws 1-1/3" (DN16CF) Smaller CF Flange 25
N/A
SBK832050S4-25
$13.50 In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 1/4-28 x 0.875" Long Hex Bolts & (25) Flat Washers 2-1/8" (DN25CF) Smaller CF Flange 25
(please log in)
HBK25028088
$15.60 In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 1/4-28 x 0.875" Long Hex Bolts & (25) Flat Washers 2-3/4" (DN35-DN40CF) Smaller CF Flange 25
(please log in)
HBK25028088
$15.60 In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 3-3/8" (DN50CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10 In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 4-1/2" (DN63CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10 In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 4-5/8" (DN75CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10 In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 6" (DN100CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10 In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 8" (DN160CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10 In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 10" (DN200CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10 In Stock
Gasket Removal Tool, For All Conflat (CF) Flange Sizes All CF Flanges 1
N/A
VZGRT
$38.20 In Stock
Thread Lubricant, 4 Ounce Tube All CF Flanges 1
N/A
VZTL-4OZ
P.O.R. In Stock
Twelve Pont Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Long 12-point Bolts, (25) Hex Nuts, & (50) Flat Washers 6" (DN100CF) Larger CF Flange 25
N/A
TBS31224225
$41.25 In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (32) 5/16-24 x 2.50" Long Hex Bolts, (32) Hex Nuts, & (64) Flat Washers 12"(DN250) Through-hole CF Flanges 32
(please log in)
HBT31224250
$43.25 In Stock
Gasket Clips, For All Conflat (CF) Flange Sizes, (10) Per Package All CF Flanges 10 Download PDF
N/A
VGC0275S
P.O.R. In Stock
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Contact Us - Zero- Length Reducer Flanges (Standard)