Centering Ring KF-20 DN20 Vacuum Fittings, ISO-KF Flange Size NW-20, Stainless Steel & Viton O-Ring
These KF-20 DN20 Centering Ring vacuum fittings follow ISO-KF standards and have a flange size of DN-20. 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. The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are NW-10, NW-16, NW-20, NW-25, NW-32, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel with Viton O-Ring.
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.For exact meausurements see below and middle graphic.
DN20 KF 20 Measurements:
A: 27 mm
B: 20 mm
C: 8 mm
D: 4 mm