ISO Elbows
ISO elbows have an ISO-K (ISO-LF) flange on each end and accommodate turns or alignment considerations in vacuum system design. Available bend options within the ISO elbow line include 45°, 90° radius, and 90° mitered.
ISO-K 45° elbows
The 45° elbow turns an ISO-K (ISO-LF) line by 45°.
- ISO-K 45° Elbow: ISO 63, 80, 100 and 160
ISO-K 90° elbows: radius or mitered
Both 90° styles use the same ISO-LF flanges, materials, and sizes. The difference is the body. A radius elbow has a smooth curved bend. A mitered elbow joins straight tube sections at an angle, which gives a shorter flange-to-centerline dimension at every size, for example, 4.13 inches against 6.25 inches at ISO 100.
- ISO-K 90° Radius Elbow: ISO 63, 80, 100, 160, 200 and 250
- ISO-K 90° Mitered Elbow: ISO 63, 80, 100, 160, 200 and 250
For KF lines, including long-radius elbows and 180° returns, see KF Elbows. To view every flange type, see Vacuum Elbows.
Complete the ISO connection
Each ISO-K flange on an elbow needs a centering ring, an O-ring, and clamps. Order claw clamps and bolt rings from ISO Clamps & Fasteners, and centering rings and O-rings from ISO Hardware & Seals.
Frequently Asked Questions: ISO Elbows
An ISO elbow is a vacuum fitting with an ISO-K flange on each end that turns a line 45° or 90°. ANCORP ISO elbows have 304L stainless ISO-LF flanges on a 304 stainless steel body.
ANCORP ISO elbows are rated to 1×10⁻⁸ Torr and are bakeable to 200 °C.
Each ISO-K flange needs a centering ring with an O-ring and a set of claw clamps or a bolt ring. Find them in ISO Hardware & Seals and ISO Clamps & Fasteners.