Weld Socket Flange KF-40 Vacuum Fittings, ISO-KF Flange Size NW-40, for 1 1/2 inch OD tubing. (Sold as One Each)
These KF-40 Weld Socket Flange 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.
Weld Socket Flange
ISO-KF Flange Size: NW-40
For Tubing OD 1 1/2 inch
Common Dimensions: A = 2.166"(55mm), B = 1.618"(41.10mm),
C = 1.52"(38.60mm), D = 1.75"(44.50mm), E = 0.50" (12.70mm)
