Centering Ring O-Ring Viton Replacement, KF-50 Vacuum Fittings, ISO-KF Flange Size NW-50, Viton®
These KF-50 vacuum fitting Viton® O-ring replacements are designed for ISO-KF standards with a size of NW-50. 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 Viton®. Viton® is well known for its excellent resistance to heat (400°F/200°C) and to aggressive fuels and chemicals. Viton® is a registered trademark of DuPont Performance Elastomers.
KF-50 Viton® O-Ring Replacement
ISO-KF Flange Size: NW-50
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