Blank with Bore KF-40 - Bore Size 1.5 inch, ISO-KF Flange Size NW-40, Stainless Steel (Sold as One Each)
These Blank Weld with Bore KF-40 - Bore Size 1.5 inch follow ISO-KF standards and have a flange size of NW-40. They are commonly used to build foreline vacuum plumbing and process systems. They are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel.
Blank Weld with Bore
ISO-KF Flange Size: NW-40
Common Dimensions: Bore Size 1.5 inch, A = 55 mm, B = 46.20 mm, C = 35.58 mm, D = 38.35 mm, E = 5.10 mm