FAQ

When should I use a 0.8 mm ID inlet seal, and when should I use a larger ID?

01 Aug 2025

The 0.8 mm ID inlet seal is used for all single-capillary column installations—whether the column is 0.25 mm, 0.32 mm, or 0.53 mm ID. The 1.2 mm ID inlet seal is used for a dual-column installation with 0.25 mm and 0.32 mm column IDs. A 116’’ ID opening inlet seal is used for the installation of two 0.53 mm ID columns or a micropacked column.

Note: Most single-column installation fittings (i.e., nuts) do not work with dual-column installations or dual-hole ferrules. For these applications, a kit such as cat.# 27185 or 20645 may be needed (e.g., with Agilent injection ports) in addition to a different inlet seal.

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  • Restek Corporation

    Restek is a leading provider of chromatography columns, accessories, and certified reference materials. Trust Restek for reliable, high-quality analytical solutions.

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