Choosing the right high vacuum fittings is important if you want to protect your investment. The wrong type of fitting can cause a lot of problems in your manufacturing process. Here are a few tips to help you select the right flanges for your application.
ASA flanges
ASA flanges are fittings that have been developed to fit a range of tubing sizes from one inch to twelve inches in diameter. These flanges are designed to withstand vacuum pressures of up to 150 PSI. They are used to connect vacuum chamber fittings, pumps, and other components. They are similar to electrical connectors, but are detachable and are designed for the high-pressure application.
ASA flanges are made from specially treated 304 stainless steel. They are available in smooth and non-bored versions. They can be welded onto tubing ranging from one inch to twelve inches in diameter. Their vacuum performance is 10 to -7 Torr.
ASA flanges have a smooth face, which helps ensure that the O-ring is kept firmly in place when the flanges are used. The flanges are made from specially treated stainless steel and have an O-ring groove machined into the flanges.
KF flanges are also known as Klein Flansche or sexless flanges. They are manufactured from stainless steel, 316LN, and 304. They have a 15-degree angle on the backside of the flange. These flanges are also available in the Quick Flange (QF) style. They are also interchangeable with the NW flange.
CF flanges
CF flanges are ideal for high-fittings. They are manufactured using robust materials for increased durability. They are available in various bore sizes for a wide range of vacuum tube diameters. They can be found in both fixed and rotatable designs. They are able to withstand high temperatures and pressures.
They are available in sizes from DN40 to DN100. They are also available in through-bolt holes, which can accommodate metric bolts. They are made from corrosive-resistant stainless steel. They are also available in bimetal designs. They feature titanium or stainless steel flange faces, which make them ideal for UHV applications.
For optimal sealing, CF flanges feature a knife edge system. This design ensures that both flanges are sealing the vacuum chamber. They are designed to operate down to 10-13 Torr, or about 10-11 Pa. CF flanges are sexless, which is important for applications that require a leak-tight seal.
They are also designed to be self-centering. They are available in several sizes, from 1.33″ to 16.5″ in OD. They can be installed with hex nuts, stainless steel bolts, or untapped holes. If you are looking for a CF flange for your vacuum application, it is important to know the different types. You will also need to know the application that you are looking for.
Wheeler flanges
CF (Conflat) vacuum flanges are a type of flange for high fittings. They are commonly used for ultra-systems. These flanges are designed to bind two pipes together. They are made from stainless steel and are available in several different sizes. They can be manufactured in either fixed or rotatable versions. They are available in widths from one inch to sixteen inches.
ConFlat flanges are available with various seals. The flanges are designed with a knife edge that creates a leak-tight seal. The knife edge is recessed in a groove in each flange. This allows the flange to be self-centering. These flanges can also be made with a clearance bolt hole for easier connection. The seals can also be made from metallic rings.
Quick Flanges (QF) are also available. They are ISO-standard quick-release flanges. These flanges are typically used for connecting pumps to a system. They are usually fastened to pipe clamps. ISO large flanges (LF) are also available.

ISO flanges
Known as the ISO Large Flange standard (LF), these fittings are often used in the process and industrial systems. They are manufactured in stainless steel to meet ISO specifications and are a fast and simple way to build vacuum plumbing.
While there are many varieties of ISO flanges, they generally fall into two categories: those that are fixed and those that are clamped. Fixed ISO flanges have a set of through-bore holes, while clamped ISO flanges use a grooved ring to insert wall clamps. Regardless of the flange type, all are manufactured with no weld prep.
These types of fittings are popular for industrial applications, where they are commonly used to close off unused ports. The ISO flanges most important features are their clamping capabilities and their sealing performance. They are also rated to work with components from other manufacturers. Some of the most common types of ISO flanges are those that use a centering ring to make the seal.
These types of fittings have a sealing capacity of up to 2×10-8 torr, whereas flanges that use clamps have a capacity of up to 1×10-8 torr. The ISO large flange standard is the larger version of the KF (QF) flanges. These fittings are manufactured to ISO specifications and are compatible with other brands.
XHV flanges
XHV flanges for high fittings offer superior materials to meet the demanding needs of your system. Materials like titanium and aluminum offer reduced outgassing rates and magnetic fields. They also offer increased material strength and ductility in cryogenic temperatures.
Bimetal CF, which you can read about here, flanges that have aluminum or titanium sealing faces explosion welded to an aluminum body. These fittings are available in industry-standard sizes. The sealing faces are also available in butt weld. The fittings are compatible with standard VCR(r) hardware.
VaCFix(r) tension chains provide fast, reliable assembly of flange components. They are non-magnetic and work well for tension-sensitive flange components. These chains are also perfect for quick mounting of KF and conical ISO flanges in the UHV range.
These flanges provide a unique, airtight seal without the need for rotatable flanges. They are also interchangeable with CF flanges. They can be mounted in any angular position. These components have been tested at different temperatures, and have been proven to be suitable for UHV and low-magnetism applications.
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