Allectra CF UHV components use the internationally accepted copper gasket flange system. They are standardised by ISO 3669-2 for the sizes DN10 TO DN400 and are compatible with the Varian Conflat® and CF or FC types and other manufacturers for sizes up to and including DN200CF. As the ISO 3669-2 standard was published in 2007, older flanges larger than DN200 might not fit to to actual flanges.
KF types are compatible with Klein Flange types and conform to ISO 1609.
ISO-K and ISO-F types are compatible with LF (Large Flange) types and conform to ISO 2861.