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40″, 1000mm, KF 25 (NW 25) Flange Vacuum Bellow,Stainless Steel Vacuum Fitting

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KF (also referred to as NW) assemblies consist of two Flanges, a Center-Ring and an aluminum Clamp. Clamps are assembled with wing nuts to insure ease of use over time without tools. A uniform application of pressure on the clamp insures a vacuum seal. The mating flange surfaces compress the O-Ring, which is held in place by a metal centering ring, to generate the vacuum seal.

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The KF Vacuum Hose Couplings are available in the following sizes: NW 16, NW 25, NW 40, and NW 50.

The KF 25, NW 25 Vacuum Hoses are available in the following lengths: 250 mm, 500 mm, 750 mm, 1000 mm, 1500 mm, and 2000 mm.

The Flexible KF-25 Hose Couplings (Also known as Flexible Bellows) are made out of 304 Stainless Steel.


  • A: 1.57 in / 40 mm
  • B: 39.37 in / 750 mm
  • 0.2 mm wall

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