What is ConFlat flange?

ConFlat (CF) fittings are flanges which utilize metal seals to attain vacuum conditions. The combination of a stainless-steel knife-edge flange and a copper gasket (OFHC) makes for a nearly impenetrable vacuum barrier. For the seal, the integrity of the knife-edge on the stainless-steel flange is vital.

How does a ConFlat flange work?

CF (Conflat) 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. Deformation of the metal gasket fills small defects in the flange, allowing Conflat flanges operate down to 10−13 Torr (10−11 Pa) pressure.

What is a ConFlat fitting?

ConFlat (CF) fittings are flanges that use –metal seals to achieve vacuum conditions. The combination of a copper gasket (OFHC) and a stainless steel knife-edge flange makes for an almost impenetrable vacuum barrier.

What is NW flange?

NW (also known as KF & QF) NW Vacuum Flanges and Fittings are quick release and are great in rough vacuum to high vacuum applications. NW Fittings are quick and easy to use and assemble into a vacuum system. Sizes range from 10 mm (NW1o) to 50 mm (NW50). Seals are reusable and bakeable to 150C with Viton o-ring seals.

What is the difference between KF and NW flanges?

Each vacuum seal is made by compression of an O‐ring on a centring ring between mating flanges. The seal is made in seconds by finger‐closure of a wing nut on the all‐metal hinged swing clamp….Klein Flange (DN/NW/KF ISO‐KF)

What is a Kwik flange?

KF HV flanges (Figure 1) are a sexless design—made from 304L or 316L stainless, aluminum, or brass. The seal is a rubber/ elastomeric o-ring mounted in a centering ring, which aligns the flanges and holds the o-ring in position.

What is a knife edge seal?

Knife-edge seals require precision machining. The CF knife-edge utilizes a sealing ridge with the knife-edge normal to the gasket, the outer side of the detail is inclined at 70 degrees. The gasket is captured on its outer diameter in counterbore details on the opposing CF flanges.

What is KF flanges?

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 an ASA flange?

Home / ASA Flanges and Fittings. ASA (ANSI) vacuum flanges provide a complete range of fittings to mount with tubing sized from 1 to 12 inches in diameter. The flange system consists of two flanges, a sealing ring, and bolt fasteners to compress the seal between the two flanges.

What is knife edge in flange?

The CF flange (also commonly referred to as the Varian trade-marked Conflat) uses a knife edge that cuts into a soft metal gasket (usually copper) to provide a leak-tight metal-to-metal seal.

What is a Conflat flange?

The CF (ConFlat) flange is the most widely used for high vacuum and UHV applications. Many gauges, instruments, accessories and feedthroughs are available on this flange system.

What is the size of the flange table?

Flange Table Nominal Size 15mm (½ inch) Diameter Bolt Number Diameter Diameter Diameter Height Thicknessofflange BSEN1092 of circle of of Diameter of raised of raised of Grey Copper Cast and Ductile iron

What are the dimensions of the CF flanges?

They are 21/8″ (1″ diameter tube), 33/8″ (2″), 45/8″ (3″), 63/4″ (5″). For other dimensions, see the ordering tables on this site. CF flanges (with identical O.D.s up to 10″ inclusive) from different (reputable) manufacturers will almost certainly seal.

What is the size of a Conflat tube?

They are 21/8″ (1″ diameter tube), 33/8″ (2″), 45/8″ (3″), 63/4″ (5″). For other dimensions, see the ordering tables on this site. CF flanges (with identical O.D.s up to 10″ inclusive) from different (reputable) manufacturers will almost certainly seal. The vacuum equipment industry adheres to the de-facto ConFlat standard.