Half Nipple Long Weld Stub KF-40, Vacuum Fittings, 1-1/2 inch OD tube, ISO-KF Flange Size NW-40, Stainless Steel (Sold as One Item)
These KF-40, 1-1/2 inch OD tube, Half Nipple Long Weld Stub fittings 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.
Half Nipple Long Weld Stub
ISO-KF Flange Size: NW-40
Common Dimensions: A= 55 mm, B= 41.20 mm, C= 34.90 mm, D= 38.10 mm (1.5 in.), E= 101 mm (4 in.)