KF Flanges and Fittings

KF fittings compliant to the Small Flange (Kleinflansch) or the KF Standard DIN 28403, ISO 2681. These KF fittings are typically used in low, medium and high vacuum applications, down to 10-8 Torr. All KF fittings have a common 15-degree tapered flange with sizes interchangeably measured in NW or DN denominations, depending on the manufacturer.

Duniway Stockroom Corporation

KF Clamps, Aluminum, With Wing Nut

KF clamps, for making a mechanical connection between two quick flanges. The name KF is adopted by ISO and DIN Standards.

The abbreviation KF stands for the German "Klein Flansche", (Small Flange), it is also called Quick Flange, (QF), NW, and DN Flange. The clamp size indicates the nominal internal diameter of the mating tube.

Clamp SizeClamp MaterialMfg. P/N.Encole P/N.Price
KF16AluminumK16F-CP172A1000$8.00each
KF25AluminumKF25-CP172A1001$10.20each
KF40AluminumKF40-CP172A1002$12.50each
KF50AluminumKF50-CP172A1003$18.00each
Duniway Stockroom Corporation

KF Flange Half Nipples in 304 Stainless Steel

KF half nipples, made of 304 Stainless Steel

Nominal SizeTube O.D.LengthMaterialMfg. P/N.Encole P/N.Price
KF160.750 inch1.150 inchAISI 304KF16-HM178A1000$16.00each
KF251.000 inch2.030 inchAISI 304KF25-HM178A1001$18.75each
KF401.500 inch2.400 inchAISI 304KF40-HM178A1002$22.25each
KF502.000 inch3.150 inchAISI 304KF50-HM178A1003$33.00each
Duniway Stockroom Corporation

KF Flange Full Nipples, Aluminum

These KF nipples are designed to hold ultra-high vacuum, (UHV) with a metal seal, or a high vacuum, (HV) with an O-ring. In a typical application the O-ring is mounted on a centering ring aligning the flanges and holding the O-ring in place.

Nominal SizeTube O.D.LengthMaterialMfg. P/N.Encole P/N.Price
KF160.750 inch2.300 inchAluminumKF16-NP179A1000$45.40each
KF251.000 inch4.060 inchAluminumKF25-NP179A1001$51.28each
KF401.500 inch4.800 inchAluminumKF40-NP179A1002$63.80each
KF502.000 inch6.300 inchAluminumKF50-NP179A1003$77.90each
Nor-Cal Products, Inc.

KF Centering Rings, With Viton O-Ring

KF centering rings, include both the centering ring and a Viton O-ring. These centering rings are used in HV applications to align and seal two mating KF flanges.

Centering ring material is Aluminum.

Nominal SizeCentering Ring MaterialO-Ring MaterialMfg. P/N.Encole P/N.Price
KF10AluminumVitonNW-10-CR-AV174A1000$8.25each
KF16AluminumVitonNW-16-CR-AV174A1001$10.00each
KF25AluminumVitonNW-25-CR-AV174A1002$11.50each
KF40AluminumVitonNW-10-CR-AV174A1003$14.50each
KF50AluminumVitonNW-50-CR-AV174A1004$16.50each

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