Ferrule Selection Guide

Ferrules are available in a variety of different materials, shapes and sizes depending on their use, the instrument and the size of the capillary column being used. Probably the most important but difficult aspect of choosing a ferrule is the selection of the material type. The table below will help you choose the appropriate ferrule material for your application.

Name / Material	Graphite	Graphite-Vespel	ClickTek	SilTite Metal

Campability	GC	GC-MS	GC*	GC, GC-MS
Wrench needed for installation	Yes	Yes	No	Yes
Time required for replacement	Long	Long	Short	Long
Temperature limit	450 °C	325 °C	350 °C	N/A
Removal of the ferrule from column possible	Yes	No	No	No
Oxygen permeability of material	Yes	No	No	No
Ferrule debris generation	Often	No	No	No
Over-/undertightening possible	Yes	Yes	No	No
Re-tightening needed	No	Yes	No	No

*Only available for specific models

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