KF flanges are ISO-standardized vacuum fittings that provide a vacuum seal by compressing a rubber O-ring between two mating surfaces. Also referred to as NW, QF, or DN flanges, KF flanges are ideal for quickly assembling vacuum systems thanks to their ease of use, maintenance, and reusability.
What is KF connection?
The Small Flange or KF standard (DIN 28403, ISO 2861) is the standard connection for vacuum pipes up to the nominal diameter of DN50 used in low, fine and high vacuum. The connection between two flanges is shown in the figure. Functional Principle. A seal is positioned between the two flanges.
What size is KF16?
Dimensions
| KF16/30mm | Tube OD: 3/4″, Flange OD: 1.18″ |
|---|---|
| KF25/40mm | Tube OD: 1″, Flange OD: 1.57″ |
| KF40/55mm | Tube OD: 1-1/2″, Flange OD: 2.16″ |
| KF50/75mm | Tube OD: 2″, Flange OD: 2.95″ |
What does NW flange stand for?
The ISO standard quick release flange is known by the names Quick Flange (QF), Klein Flansche (KF, German which translates to “Small flange” in English) or NW, sometimes also as DN. Standard sizes are indicated by the nominal inner diameter in millimeters for flanges 10 through 50 mm in diameter.
What is a KF 16 fitting?
Description. These KF-16 Weld Socket Flange fittings follow ISO-KF standards and have a flange size of NW-16. 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.
How do CF flanges work?
CF (ConFlat) flanges use an oxygen-free high thermal conductivity copper gasket and knife-edge flange to achieve an ultrahigh vacuum seal. Each face of the two mating CF flanges has a knife edge, which cuts into the softer metal gasket, providing an extremely leak-tight, metal-to-metal seal.
