23
✶
For technical support, call
800-356-1688, ext. 4
(814-353-1300, ext. 4)
or call your local
Reducing Ferrules
Fitting
Ferrule
Fits Column
Vespel
®
/
Size
ID
ID
qty.
Graphite Graphite
1
/
8
"
0.4mm
0.25mm
5-pk.
20205
20254
1
/
8
"
0.5mm
0.32mm
5-pk.
20205
20255
1
/
8
"
0.8mm
0.53mm
5-pk.
20206
20215
1
/
4
"
0.4mm
0.25mm
5-pk.
20203
—
1
/
4
"
0.5mm
0.32mm
5-pk.
20203
20257
1
/
4
"
0.8mm
0.45/0.53mm
5-pk.
20204
20217
Blank Ferrules—For
1
/
16
-Inch Fittings
Fitting
Ferrule
Vespel
®
/
Size
ID
qty.
Graphite
1
/
16
"
no hole
10-pk.
20240
Ferrule
Fits Column
Graphite
Graphite
ID
ID
2-pk.
10-pk.
0.4mm
0.18–0.25mm
20280
20281
0.5mm
0.28/0.32mm
20282
20283
0.8mm
0.45/0.50& 0.53mm
20284
20285
Graphite Ferrules forM4 Fittings for GCQ Thermo Finnigan 8000*& TRACE
™
2000
Encapsulated Ferrules—For
1
/
16
-InchCompression Fittings
• Will not deform and stick in fittings.
• Reusable.
• Less torque needed to seal ferrule.
• Restek’s unique blend of graphite provides low fragmentation and outgassing.
Ferrule ID
Fits Column ID
qty.
cat.#
0.4mm
0.25mm
10-pk.
21036
0.5mm
0.28/0.32mm
10-pk.
21037
0.8mm
0.45/0.53mm
10-pk.
21038
HOT
tech
tip
Choosing theRight Ferrule
Although graphite andVespel
®
/graphite
ferrules each have advantages and dis-
advantages, the choice of ferrule com-
position is largelyapersonal preference.
Graphite ferrules are soft, easy to seal,
stable to 450°C, and contain no binders
that might off-gas.Vespel
®
/graphite fer-
rules work better for vacuum and high-
pressure applications (e.g., GC/MS)
because they will not allow oxygen to
permeate into the system, whereas
graphite ferrules will. In addition,
Vespel
®
/graphite ferrules do not frag-
ment, which also makes them ideal for
GC/MS use. Because Vespel
®
/graphite
ferrules aremade from a hardermateri-
al, theymight require retightening after
several temperature cycles.
Teflon
®
Ferrules
• Upper temperature limit 250°C.
• 100%Teflon
®
; completely inert.
• One-piece design requires no back ferrule.
Fitting
Ferrule
Size
ID
qty.
cat.#
1
/
16
"
1
/
16
"
10-pk.
21122
1
/
16
"
0.4mm
10-pk.
21123
1
/
16
"
0.5mm
10-pk.
21124
1
/
16
"
0.8mm
10-pk.
21125
1
/
8
"
1
/
8
"
10-pk.
21126
3
/
16
"
3
/
16
"
10-pk.
21127
1
/
4
"
1
/
4
"
10-pk.
21128
