What is a KF flange?
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 is an ISO F flange?
An ISO-K and ISO-F compound consists of two symmetrical flanges and one O-ring seal, which is positioned and supported with an inner centering ring and also supported by an outer ring. The required contact pressure for sealing, is created with double claw clamps (Figure 3.9) or screws (Figure 3-13).
How does a KF flange work?
KF flanges are made with a chamfered back surface that are attached with a circular clamp and an elastomeric o-ring (AS568 specification) that is mounted in a metal centering ring. Some sizes share their flange dimensions with their respective larger neighbor and use the same clamp size.
What is NW in piping?
An NW long flange for vacuum piping. [Features]Glass blanking flange.
What is ConFlat flange?
The CF flange (originally called ConFlat) is a sexless design where both flanges are identical. The seal mechanism is a knife-edge that is machined below the flange’s flat surface. As the bolts of a flange-pair are tightened, the knife-edges make annular grooves on each side of a soft metal gasket.
What size is KF40?
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 class 300 flange mean?
The concept of flange ratings likes clearly. A Class 300 flange can handle more pressure than a Class 150 flange, because a Class 300 flange are constructed with more metal and can withstand more pressure.