1/16" GC Ferrule, 0.9 mm ID, long, 85% Vespel / 15% Graphite, 10 pc/PAK

Vespel/Graphite GC ferrules are made from a high quality polyimide/graphite blend. They seal with minimal torque and can be reused and repositioned along capillary columns if they are not overcompressed in the fitting. Due to slight shrinkage at high temperatures, they must be tightened after initial temperature cycles to avoid leaks.
Two types of Vespel/Graphite are commonly used, one with 40% graphite and one with 15% graphite. They are ideal for GC/MS interface applications as they are non-porous to oxygen. The inclusion of graphite increases high temperature tolerance and reduces sticking and shrinkage.
Trajan offers both Vespel/Graphite blends, a 60/40 blend and an 85/15 blend. The 85/15 maintains high hardness and a long service life. The 60/40 blend is softer, with improved wear resistance and reduced friction. These ferrules require less force to be compressed and form a seal.
Both blends have an upper temperature limit of 400 C.