ISO (QF/LF, KF, NW/ISO-K) Flanges & Fittings

ISO-QF (Quick Flange) and LF (Large Flange) flanges are part of the same family of ISO standard elastomer sealed vacuum components. ANCORP ISO flanges and fittings are manufactured in accordance with ISO (International Standard Organization) 2861 standards and tolerances. These flanges are an economical, convenient, and simplified means of constructing custom high vacuum systems.

ISO flanges provide a complete range of fittings to mount with tubing sized 1/2 inch up to 20 inches in diameter. The flange system consists of two sexless, 360° rotatable flanges, a centering ring for alignment and support of the sealing ring, and a fastener to compress the seal between the two flanges. ISO-QF and LF sealing components are similar, however, their fastening methods differ. ISO-QF flanges are sealed using quick flanges whereas the ISO-LF/LFB flanges are sealed using claw clamps and bolt kits, respectively. ANCORP offers a complete line of flanges, fittings, valves, traps, and accessories with ISO connections that can be used to create a complete vacuum system or pumping line.