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High-Vacuum (HV) ISO Flanges/Hardware

Two Blank ISO KF/LF flanges Show Flanges for Two Blank ISO KF/LF flanges
Flanges
Two ISO centering rings in different sizes Show Centering Rings for Two ISO centering rings in different sizes
Centering Rings
Hinged and double claw KF flange vacuum clamps Show Clamps for Hinged and double claw KF flange vacuum clamps
Clamps
ISO Flanges, KF Flanges, LF Flanges and Hardware, drawing

ISO Flanges, KF Flanges, LF Flanges

ISO-KF Flanges and LF Flanges

AGP offers a large line of ISO flanges in the KF, LF Flange style.  Fittings and hardware are designed to incorporate the industry standard "hinged or claw" clamp with centering ring sealing principle.  This is the standard high vacuum sealing method used throughout the industrial and scientific vacuum communities.  ISO flanges as well as mounting hardware is available to meet the demands of high vacuum environments.

ISO Flanges are rated for 150ºC and High Vacuum to 1x10-8 Torr.

What is the difference between KF flanges and LF ISO flanges?

  • KF flanges have a tapered edge and require a Hinged Clamp to tighten the flange to the centering ring, ultimately making the vacuum seal.
  • LF flanges have groves in the top that accommodate the use of Claw Clamps and bolts to tighten the flange to the centering ring , ultimately making the vacuum seal.

Both styles of ISO flange require the use of a centering ring with a Viton O-ring.

ISO Flange Dimensions, Size and Style

Accu-Glass Products, Inc., offers an expansive line of ISO flanges (KF and LF flanges) in various sizes and styles. KF flange dimensions range from NW16 to NW50, while ISO flange dimensions range from NW63 to NW200.

Our range of products include numerous KF and LF flanged parts from conical reducers, nipples, elbows and couplings to all supporting mounting hardware including hinged clamps, claw clamps and centering rings.

View detailed drawings of each style on the detail page for that vacuum product.