24
InAgilent split/splitless injection ports, it can be diffi-
cult tomake andmaintain a good seal with a conven-
tionalmetal inlet disk. Themetal-to-metal seal dictates
that the analyst apply considerable torque to the reduc-
ing nut, and, based on our testing, this does not ensure
a leak-tight seal. Over the course of oven temperature
cycling,metal seals are prone to leaks, which ultimate-
ly can degrade the capillary column, and cause other
analytical difficulties.
Our Vespel
®
Ring Inlet Seal greatly improves injection port performance—it seals even
after repeated temperature cycles andwithout retightening the reducing nut! This seal fea-
tures aVespel
®
ring embedded into its face. This softVespel
®
ringwill not harm the critical
seal on the injector body, and is outside the sample flow path. Tests using a high sensitivi-
ty helium leak detector indicate the Vespel
®
Ring Inlet Seal seals equally effectively at
torques of 5lb. or 60lb. (Figure 1).
Why trust ametal-to-metal seal when you canmake leak-tight seals quickly and easily—
andmore reliably—with theRestekVespel
®
Ring Inlet Seal?Use the stainless steel seal for
analysis of unreactive compounds. To reduce breakdown and adsorption of active com-
pounds, use thegold-platedor Silcosteel
®
-treated seals.Thegold surfaceoffers better inert-
ness than standard stainless steel; Silcosteel
®
treatment provides inertness similar to that of
fused silica capillary columns.
Vespel
®
Ring Inlet Seals for Agilent 5890/6890/6850GCs
0.8mm IDVespel
®
Ring Inlet Seal (washers included)
2-pk.
10-pk.
Gold-Plated
21562
21563
Silcosteel
®
21564
21565
Stainless Steel
21560
21561
1.2mm IDVespel
®
Ring Inlet Seal (washers included)
2-pk.
10-pk.
Gold-Plated
21568
21569
Silcosteel
®
21570
21571
Stainless Steel
21566
21567
Vespel
®
ring
minimizes leaks
Re-Threading Tool
• Repair worn or damaged threads.
• Multiple uses (injection ports, fittings, etc.).
• Built-in guide to prevent cross-threading.
Description
qty.
cat.#
Re-threading Tool for
1
/
4
" compression fitting
for Agilent split/splitless injection ports
ea.
23018
1)Worn& damaged threads can
allow oxygen into the sys-
tem—compromising analyti-
cal results and destroying
columns.
2)Screw the tool completely
onto the injection port in a
clockwise direction.
3)Unscrew the tool and inspect
the threads, repeat as neces-
sary, and, when done, wipe
threads with methanol to
remove any debris.
1
2
3
Achieve a better seal!
• Easy-to-use, patent-pending designmakes a better seal, easily.
• Prevents oxygen from damaging your columns.
• Reduceswear on the injection port body.
Vespel
®
Ring Inlet Seals for Agilent 5890/6890 and 6850GCs
Figure 1
TheVespel
®
Ring Inlet Seal achieves
leak-tight seals even at low torque, reduc-
ing the chance of leaks.
Leak Rate (Log
10
atm cc/sec.)
0 10 20
30
40
0.01
1E-3
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
1E-10
50
60
Vespel
®
Ring Inlet Seal
stainless steel
original equipment
inlet seal
Torque (in. lbs.)
