Fittings & Flanges
Del-Seal CF™ Metal Seal Flanges
Del-Seal™ CF flanges are 100% Conflat® compatible metal-seal flanges suitable for the most demanding UHV applications. Del-Seal™ CF metal seal flanges are available in a wide range of sizes that can accommodate 1/8" to 14" tube diameters. For tube sizes above 14 inches and up to 24 inches in diameter, MDC wire seal flanges are recommended.
Del-Seal™ CF Fittings
Wire Seal Flanges
An .080 inch cross-section diameter OFE copper wire gasket is compressed between male and female mating flanges. The beveled geometry of the sealing surfaces confine the flow of the crushed gasket material, causing it to fill minor imperfections in the seal area. See the wire seal flange cross-section diagram at the bottom of the previous page. Applications for the use of wire-seal flanges include bell jars, vacuum furnaces and a variety of other ultrahigh vacuum enclosures. As with Del-Seal™ CF flanges, these too can be used with elastomer gaskets for high vacuum applications.
Nonrotatable and Rotatable Flanges
Del-Seal™ CF metal seal flanges are fitted with either clearance or threaded fastening bolt holes. Clearance holes are commonly referred to as through holes and threaded holes are commonly referred to as tapped holes. Tapped holes provide threads through the entire thickness of a flange. Exceptions to this include reducer flanges and cubes which are fitted with blind tapped holes. Blind tapped holes are drilled only part way through a flange and do not break through. Blind tapped holes are typically used where drilling through a component is not possible or desirable, like the direct tapping of a chamber wall, where breaking through would provide a leak path through the vacuum walls.