Connection type fitting VALCO

medical

Valco fittings for chromatography are typically compression fittings, in which a ferrule is compressed onto the tube as a nut is tightened. They offer the best stability and reliability for high pressure applications in GC, HPLC, and UHPLC. Internal nuts are for use with all standard Valco internal fittings and most valves, with sizes for tubing from 1/32" to 1/4" OD. These specialty nuts are radiused to facilitate a tight bend as the tube exits the fitting, helping to prevent kinks in very thin wall tubing. Available in 1/16" and 1/8" stainless and 1/16" hex and fingertight PEEK versions. Valco metal ferrules are available for tubing ODs from 1/32" to 1/4", in a variety of corrosion-resistant alloys. Valco polymeric ferrules are available in a full range of materials, including some hard-to-find composites such as graphite-filled polyimide. Internal fittings provide the smallest possible fitting volume. But there are situations, such as when you're using graphite ferrules which tend to become lodged in internal details, when an external fitting might be more desirable. A typical situation of that nature is the connection of a fused silica capillary to a valve. Our unique internal to external reducer/adapter permits the 1/32" nut to be tightened without affecting the 1/16" connection.